Current issue

• 2015 Vol.5 No.10 Published:30 October 2015

  Effects of Photosynthetic Characteristics and Yield of‘Jinza No.34’with Different Plant Patterns 2015, 5 (10):  1-5.  DOI: 10.11923/j.issn.2095-4050.cjas15030008 Abstract + ( 1523 )   PDF ( 1284KB )   ( 1150 ) In order to explore the cropping pattern which is suitable for mechanized cultivation of dwarf denseresistant sorghum‘Jinza No.34’, by a field experiment, the effects of cultivation pattern with different line spacing on plant height, LAI, photosynthetic characteristics, average biomass, yield and yield components of ‘Jinza No.34’were studied. The results showed that there was a downtrend of plant height, LAI, photosynthetic characteristics, average biomass and yield at jointing and heading stages with the increase of line spacing and the decrease of row spacing. Wide-narrow row of 60 cm: 40 cm planting pattern could significantly improve the plant height compared with equal row on heading stage, enhance LAI and photosynthetic characteristics at jointing and heading stages, and increase average biomass at heading and maturity stages. The number of branch, 1000-grain weight and yield were significantly increased by 60 cm: 40 cm planting pattern and the average yield increased by 3.36%-18.81% compared with equal row. The results showed that there was a close relationship between line spacing planting and main agronomic characters, photosynthetic characteristics and yield of sorghum. Wide-narrow row planting could increase photosynthetic characteristics of‘Jinza No.34’, promote its growth and development, and achieve high-yield.

  Effects of Two Kinds of Plant Growth Regulator on Sorghum Growth, Yield and Quality 白文斌＊,,,,,,,, and 2015, 5 (10):  6-10.  DOI: 10.11923/j.issn.2095-4050.cjas15010029 Abstract + ( 1920 )   PDF ( 1350KB )   ( 942 ) By spraying different doses of sorghum chlormequat and ethephon solution, field experiments were designed to ascertain the effect of chlormequat and ethephon solution on sorghum growth, yield and quality. The experiments were conducted with two factors in four levels in a randomized block design with three replications, spraying the regulators at the jointing stage (July 5, 2014). Ethephon and chlormequat, each had six concentration gradients. Ethylene dilutions were 100 times, 200 times, 400 times, 800 times, 1000 times and water control; cycocel dilutions were 100 times, 250 times, 400 times, 550 times, 700 times and water control. Results showed that the main role of two kinds of growth regulators was to inhibit the biosynthesis of gibberellin and control elongation growth of plants. The plant dwarfing effect of ethephon (heading stage) increased by 29.32%, 34.58%, 21.80%, 21.8%, 2.18% compared with the control; while that of ethephon (maturity stage) increased by 21.07%, 22.16%, 19.77%, 18.63%, 12.11% compared with the control. Dwarfing effect of chlormequat (heading stage) increased by 5.43%, 13.18%, 3.10%, 3.88%, 8.53% compared with the control; while that of chlormequat (maturity stage) increased by 9.94%, 29.19%, 13.64%, 18.01% , 14.91% compared with the control. Spraying different concentrations of ethephon, CCC on sorghum had a certain impact on grain quality. Spraying ethephon diluted 200 times had the most obvious improvement in grain quality, chlormequat diluted 250 times had significant effect. Dwarfing effect of ethephon spraying was more significant than that of chlormequat, but in improving sorghum photosynthetic parameters, chlorophyll content and the yield, the two regulators had no obvious difference. In the production, spraying ethephon and chlormequat at jointing stage can effectively control the sorghum plant height, yield achieve densification increase.

  Study on Adaptability of Mungbean Varieties After Winter Wheat in South of Shanxi 2015, 5 (10):  11-17.  DOI: 10.11923/j.issn.2095-4050.cjas15040007 Abstract + ( 1567 )   PDF ( 1251KB )   ( 806 ) In order to screen the superior Mungbean varieties which are suitable for multiple cropping in wheat stubble in the south of Shanxi, twenty-six varieties from Hebei, Shandong, Henan, Shannxi, Shanxi and other provinces were introduced successively, and the screening test was carried out for 3 years. Through the surveying of phenophase, resistance, yield and comprehensive agronomic traits, the differences of the varieties and the yield variation between different years were analyzed. The results showed that the seedling emerging days of different varieties were mainly consistent, which were 5-6 d. The growth period of different varieties was different, the biggest difference was 13 d. Comprehensive resistance of early maturity varieties was better than that of late varieties. The yield of the varieties reached significant or extremely significant difference in a year. The meteorological factors between different years could cause big difference of the annual yield. The yield was up to 2140.53 kg/hm2 in 2013 when the temperature, water, sunlight well met the growth requirements of Mungbean. There were also great differences of the agronomic and economic traits of different varieties. According to the selection criteria and combined with the comprehensive performance of all varieties in 3 years, five varieties including‘Jilv 7’‘Jilv 8’‘Jilv 9’‘Baolv 942’and‘Heizhenzhu’, which had high yield, early maturity, good comprehensive traits, stable performance between different years and were suitable for the local production, should be recommended as planting varieties in wheat stubble in the south of Shanxi.

  Study on the Relationship between Different Sowing Dates and Density in The Yield of Jindamai(pi) 2 2015, 5 (10):  18-21.  DOI: 10.11923/j.issn.2095-4050.cjas15070001 Abstract + ( 1598 )   PDF ( 1275KB )   ( 958 ) In order to explore the best comprehensive high yield cultivation techniques of‘Jindamai2’in the local ecological environment, and provide scientific theory basis for planting this variety with high yield and high efficiency, the study on the relationship between yield and different seeding times and seeding densities of this variety was conducted. The results showed that in the sowing amount range of 60.0 kg/hm2 to 120.0 kg/hm2,the yield increased along with the sowing quantity increase,theamplituderangedfrom 6186.98to6573.66kg/hm2;on the contrary, when the sowing quantity was further increased, the yield reduced. Sowing date from September 30th to October 5th could result in higher yield, the amplitude ranged from 6600.33 to 6693.67 kg/hm2, and when sowing date was further delayed, the yield reduced. Suitable sowing date and sowing quantity were crucial to gain high yield of the barley variety‘Jindamai2’.

  Technical Protocol of Cotton-wheat Relay Intercropping 2015, 5 (10):  22-26.  DOI: 10.11923/j.issn.2095-4050.cjas15030020 Abstract + ( 1770 )   PDF ( 1253KB )   ( 2187 ) The aims were to normalize the wheat-cotton relay intercropping planting, solve the contradiction of contending soil between food stuff and cotton, stabilize cotton production and achieve good quality and high yield as well as efficiency of grain and cotton. By summarizing years of experiences of the wheat-cotton relay intercropping cultivation, and screening published research results, the cultivation techniques were combined, optimized and verified through field tests. Based on the technology standardization requirements, wheat-cotton relay intercropping cultivating techniques were elaborated in varieties selection, sowing techniques, waterfertilizer management, plant pruning and topping, chemical control, disease as well as pest control etc, to solve the conflict of contending for water, fertilizer, shading light during symbiotic period. The double cropping cotton could open bolls early and intensively by making full use of time, space, light energy and land resources, which was beneficial to improve the quality and production of grain and cotton, and to achieve synchronized growth of grain and cotton. The regulation was made to provide convenience for farmers with field management operation, which was an effective way to solve the contradiction of contending soil between food stuff and cotton, to stabilize the cotton production, to achieve the double harvest of wheat and enhance the economic income of farmers.

  Analysis of Genetic Analysis on Combining Ability and Applied Evaluation of Five Early Maturing Maize Inbred Lines in Heilongjiang 2015, 5 (10):  27-32.  DOI: 10.11923/j.issn.2095-4050.cjas15010025 Abstract + ( 1132 )   PDF ( 1345KB )   ( 859 ) The paper aims to know genetic affinity about early maturing maize inbred lines of Heilongjiang, reasonably and accurately divide heterosis groups and build model of heterosis. 5 main early maturing corn inbred lines of Heilongjiang Province were selected using NC-Ⅱ design. Combining ability analysis showed that 7 main agronomic traits of 5 main early maturing corn inbred lines had significant difference, genetic index analysis of corn cross combination showed that the ear diameter trait of the cross combination with He344 as female parent had a positive TH (transgressive heterosis), showing powerful heterosis and a positive MH (middle parent heterosis). These results indicated that the effective use of the main early maturing corn inbred lines had very important theoretical and practical value for the corn breeding in Heilongjiang Province or early maturing spring corn region in China. Models of early maturing maize heterosis of Heilongjiang were: heterosis models of Lancaster groups × Tangsipingtou groups, Lancaster groups×Reid groups, Lancaster groups×Hybrid selection groups. The results provided theoretical basis and practice for the efficient use of early maturing maize of Heilongjiang.

  Study on 35% carbendazim and azoxystrobin Suspension Concentrates 2015, 5 (10):  33-37.  DOI: 10.11923/j.issn.2095-4050.cjas14030003 Abstract + ( 1436 )   PDF ( 1172KB )   ( 924 ) In order to study the better formula of 35% carbendazim and azoxystrobin suspension concentrates, the formula was developed with the method of wet milling, and the surfactant selection was conducted with the orthogonal design. The results showed that the most reasonable composition consisted of carbendazim 30.0%, azoxystrobin 5.0%, NNO 2.0%, 600#4.0%, BY140 3.0%, xanthan gum 0.1%, glycol 2.0%, octanol 0.5% and water, and the experimental results showed that the suspension rate of this product was over 98% , the decomposition rate of the active ingredient was less than 3% at (54±2)℃ with 14 days, the characteristics conformed to the requirements for the product, the field effect was 92.76% when used as 1500 g/hm2 to control powdery mildew of strawberry.

  Efficient nitrogen application strategy of hybrid rice in Chongqing winter paddy field 2015, 5 (10):  38-43.  DOI: 10.11923/j.issn.2095-4050.cjas14110020 Abstract + ( 1180 )   PDF ( 1324KB )   ( 966 ) [The study aims to improve per unit yield and nitrogen use efficiency in southwest hilly and mountain area winter paddy fields represented by Chongqing and achieve the target of high yield and high efficiency in regional rice production and an environmental friendly production process. The author selected‘Yuxiang 203’ as material, took the method of field trial and studied the effects of fertilizer application amount and methods on accumulation and distribution of biological yield, nitrogen use efficiency and rice yield in heading to mature stage. The results showed that, rice biological yield, nitrogen accumulation quantity and grain yield increased with the increase of nitrogen application rate. Use nitrogen fertilizer as heading fertilizer was conducive to accumulation and rational distribution of biological yield, when the nitrogen rate was 10 kg/666.7 m2, base N fertilizer and jointing N fertilizer proportion was 5:5, the output percent and transportation percent of stemsheath store matter were higher, which were 56.59% and 48.59% , respectively. Use nitrogen fertilizer as heading fertilizer was conducive to increase agronomy utilization efficiency and apparent utilization efficiency, the nitrogen application ration varied with nitrogen application. Use nitrogen fertilizer as heading fertilizer was conducive to increase plain number of grains per ear, seed setting rate and thousand grain weight, and achieved large panicle and high production. Giving consideration to both grain yield and nitrogen utilization, efficient nitrogen application strategy of hybrid rice in Chongqing winter paddy field was as follows: the nitrogen rate was 10 kg/666.7 m2, the proportion of the base N fertilizer and jointing N fertilizer was 6:4 or 5:5, actual grain yield was 9910.68-9940.62 kg/hm2, the average grain yield was 9925.65 kg/hm2.

  A Case Study on Agricultural Cleaner Production Technology Practice and Ecological Compensation Policies in Xianning City 2015, 5 (10):  44-49.  DOI: 10.11923/j.issn.2095-4050.cjas14120032 Abstract + ( 1207 )   PDF ( 1236KB )   ( 1006 ) Agricultural cleaner production is an inevitable choice for controlling agricultural non-point source pollution, protecting water environment and curbing the deterioration of ecological environment. It is also a necessary choice for saving energy, increasing production and promoting the modern agriculture and sustainable development of society. Through researching and practicing the ecological compensation policy and agricultural cleaner production technology in Xianning City, four organic planting patterns were summed up which were sweet-scented Osmanthus and tea intercropping, pig-biogas-vegetable circulation mode, leisure and tourism organic orchard and grape ecological planting. These stereo planting patterns provided reference for the establishment of Chinese agro-ecological compensation regulations and policies.

  Investigation on Fertilization in Protected Vegetable Cultivation in Yangzhou 2015, 5 (10):  50-55.  DOI: 10.11923/j.issn.2095-4050.cjas15010027 Abstract + ( 1042 )   PDF ( 1222KB )   ( 899 ) In order to understand the fertilization status of protected vegetable cultivation in Yangzhou, a survey was conducted on the scale, vegetable species and fertilization status in protected vegetable cultivation of Yangzhou in 2013, and soil samples were collected in typical vegetable zones. The results showed that corporation and corporation cooperative were the general models in the vegetable zones, and green vegetable, watermelon, tomato and pepper were common species. Furthermore, fertilization in fifteen vegetable zones showed that the combined application of compound fertilizer and organic fertilizer was conducted, and the application of compound fertilizer accounted for a larger part. Compared to the soil in field, nutrients in soil of the protected vegetable cultivation zones were higher, especially available P with an average of 66.1 mg/kg and available K with an average of 127.6 mg/kg, which were 300% and 30.8% higher than that of soil in field, respectively. Based on the investigation, soil status and fertilization structures were understood in the protected vegetable cultivation, and the strategies were suggested for proper fertilization in vegetable zones in Yangzhou.

  Status and temporal-spatial variation of organic matter of cultivated soils in Hangzhou region 江校尧 and 2015, 5 (10):  56-59.  DOI: 10.11923/j.issn.2095-4050.cjas15030016 Abstract + ( 1153 )   PDF ( 1217KB )   ( 852 ) In order to understand the status of organic matter in the cultivated soil in Hangzhou, variation characteristics of organic matter content of whole cultivated soil was analyzed using soil test data recently obtained from soil fertility survey. The results showed that the level of organic matter of cultivated soil in Hangzhou was mainly medium, organic matter of most cultivated soil belonged to the level of 20-40 g/kg, and about 1/4 (27.00%) soil had a low level of organic matter. Average content of organic matter followed the order of water net plain > hills and valley plain > coastal plain. Organic matter of paddy soil decreased since the second national soil survey, while the average content of organic matter in upland increased. It was concluded that soil organic matter in Hangzhou varied greatly. Input of organic fertilizers to paddy field should be increased to prevent further decline of soil organic matter, and more attention should be paid to improve organic matter of cultivated soil in the coastal plain.

  application research on Chitosan an fulvic acid compound with film-former in seed coating agent 2015, 5 (10):  60-63.  DOI: 10.11923/j.issn.2095-4050.2014-xb0687 Abstract + ( 1104 )   PDF ( 1307KB )   ( 1169 ) A new natural high molecular material, including chitosan and fulvic acid, was used to improve the film-forming ratio and active ingredient release rate of seed coating in the present study. Degree of uniformity, falling off rate, germination rate and film forming ability of seed coating, which used new natural high molecular material, were tested by classic normal methods. The results showed that 1.0% chitosan and 3.0% fulvic acid was the best dosage of the new film-forming agent in this research. The physical-chemical indexes of new high molecular agent were better than that of one single composition film-forming agent. Besides, the new high molecular agent had more stability application performance because the compounding high molecular film-forming agent had a synergistic effect.

  Research Progress of Tobacco Continuous Cropping Obstacles and Prevention Technology 2015, 5 (10):  64-69.  DOI: 10.11923/j.issn.2095-4050.cjas15040010 Abstract + ( 1227 )   PDF ( 1351KB )   ( 1009 ) Tobacco continuous cropping obstacle was the phenomenon that tobacco plants showed plant growth retardation, stunting, yield and quality reduction, and soil borne diseases damage aggravation under the continuous cropping. The tobacco continuous cropping obstacle was generally divided into two types: the specific continuous cropping obstacle and the non- specific continuous cropping obstacle, both with two characteristics as specificity and durability. It was generally accepted that the continuous cropping obstacle of tobacco was mainly caused by biological factors, namely the rhizosphere micro- ecological environment imbalances, which occurred due to many reasons, including the beneficial bacteria species and amounts decrease in continuous cropping soil; harmful fungi and nematodes increase during the long-term continuous cropping; the accumulation of self- toxic substances from the same plant in long period planting; a large number of consumption of single nutrient from the continuous cropping of same plant, and so on. Commonly, the method used to prevent and cure continuous cropping obstacle included soil disinfection, resistance breeding and biological control. The biological control had strong specificity and durable recovery, and was environmentally friendly, which had become the research hotspot in the field. To strengthen the research on the mechanism of continuous cropping obstacle of tobacco in order to reduce and avoid the loss caused by continuous cropping had important economic and social significances for the development of Chinese and even the global tobacco industry. On the basis of comprehensive understanding of the research progress in the related fields both at home and abroad, the authors proposed the research focus combining with the industry development in the future, and hoped to provide theoretical basis and references for the prevention of tobacco continuous cropping obstacle.

  Application Research of Different Foliar Fertilizers on Cucumber 2015, 5 (10):  70-74.  DOI: 10.11923/j.issn.2095-4050.cjas15010018 Abstract + ( 1176 )   PDF ( 1332KB )   ( 963 ) In order to develop a better foliar fertilizer on vegetables, the effect of two kind of home-made foliar fertilizers（T1 and T2） and two commercial foliar fertilizers（T3 and T4） on the SPAD, stem diameters, yield and quality of pot cucumber was evaluated in this paper. The results showed that foliar fertilizers could increase the chlorophyll content (SPAD) and the stem diameter to delay aging compared with the CK group, but the difference was not extremely significant. Foliar fertilizers could also significantly increase the yield from 53.89%-159.30% and improved the commodity value by increasing of single fruit weight, compared with other treatments, the yield of home-made foliar fertilizer 2(T2) was the largest, the single fruit weight of T4 was the largest, T2 as follows, they increased by 19.94% and 19.55% than that of CK. Spring foliar fertilizers can also increase the content of soluble sugar, organic acid, soluble protein, amino acid and vitamin C of cucumber, so the quality was improved, the quality of T1 and T2 were better than T3 and T4. Home-made foliar fertilizer 2(T2) was better than other two commercial foliar fertilizers combined with yield, quality and commodity value, which is a new kind of foliar fertilizer on vegetables.

  Effects of Irrigating Roots by Fermentation Broth of Cabbage Leaves on Tomato Yield and Quality Ji Xuejing,Yang Rui,Jiang Rong,Wang Jianli,Wang Shaohui and Zhao Fukuan 2015, 5 (10):  75-78.  DOI: 10.11923/j.issn.2095-4050.cjas14110005 Abstract + ( 1199 )   PDF ( 1269KB )   ( 809 ) Vegetable waste not only pollute the environment, but also resulted in a waste of resources. Application of biogas technology can gain high quality energy and solve environmental pollution problem. In order to explore a new method of the application of vegetable waste, the author used the biogas fermentation broth of vegetable waste (cabbage leaves) and irrigated at different concentrations to tomato roots. Effects of biogas fermentation broth on tomato yield and quality were analyzed. Results showed that biogas fermentation broth increased the yield and the content of Vitamin C in tomato fruits. The yield of treatment G5 (the percentage of biogas fermentation broth was 80%) increased 64.25% than that of control. The content of Vitamin C of treatment G3 (the percentage of biogas fermentation broth is 40%) increased 37.60% than that of control.

  Control Techniques of Wine Grape Pest in Sichuan Tibetan Areas 陈晓娟,张鸿,刘伟,王剑 and 卢代华 2015, 5 (10):  79-83.  DOI: 10.11923/j.issn.2095-4050.cjas15020011 Abstract + ( 1173 )   PDF ( 1227KB )   ( 928 ) Wine grape industry developed rapidly in Western Sichuan Plateau in recent year, but the wine grape pests occurred seriously and affected the healthy and orderly development of wine grape industry. To control the pests of wine grape in Sichuan, preliminary investigation identified that wine grape pests in Sichuan Tibetan included Plasmopara viticola, Uncinula necator, virus, short- beard mites, aphids，lygus bugs，clearwing moth, scarab beetles, longicorn beetles, bird, wasp, etc.. And the main species were P. viticola, U. necator, sparrows and wasp. Their damage characteristics were investigated. Poor ventilation and high humidity in vineyard was found to be the main cause of high incidence of P. viticola and U. necator. The control techniques such as reducing the number of pathogens in vineyard, increasing the vineyard ventilation and light, bagging, setting sweet and sour liquid trap were proposed and applied. And rational use of pesticides such as stone sulfur mixture, bordeaux mixture, difenoconazole azole and dimethomorph were proposed.

  Studies on the Extraction Conditions of Lycopene from carrot 2015, 5 (10):  84-87.  DOI: 10.11923/j.issn.2095-4050.cjas15050002 Abstract + ( 1029 )   PDF ( 1314KB )   ( 871 ) Lycopene is a kind of functional natural colorants,it has many physiological function,antioxidation,anti-cancerr,enhancing immune ability and so on.The extraction of lycopene with organic solvents at the varied temperature,time and solid to liquid ratio was investigated.The optimized process conditions of extraction of lycopene from fresh carrot was the extraction effect with ethyl acetatewas the best, so ethyl acetatewas selected as the extraction solvent.The optimum extraction technology for lycopene was that liquid-to-solid ratio of 2:1(ml/g), extraction time of 100min, extraction temperature of 35℃.The method had advantages of low cost,high efficiency and easy to automatization,thus having broad industrialized application prospects.

  Development of D Ggenome-specific Marker in Oat 2015, 5 (10):  88-92.  DOI: 10.11923/j.issn.2095-4050.cjas15050012 Abstract + ( 1145 )   PDF ( 1685KB )   ( 904 ) The research aims to improve the efficiency of molecular breeding and develop D- Genome-specific markers in oat. Firstly, random amplified polymorphic DNA (RAPD) analysis was performed on 9 oat varieties with 300 random 10-based primers. A repetitive sequence of 1287 bp, named OPAB011287 was identified in the D genome of oat. BLAST search revealed that the sequence of OPAB011287 was highly homologous to a part of a retrotransposon. Based on the sequence of OPAB011287, a pair of sequence- characterized amplified region primers (SCAR) was designed which was more convenient and stable. And the results showed that SCAR marker was specific to target oat with D genome, which provided a powerful tool for oat marker assisted breeding and the better service for the breeding of oat.

  Comparison of Methods for Total RNA Extraction from Rosa rugosa. 2015, 5 (10):  93-96.  DOI: 10.11923/j.issn.2095-4050.cjas15010014 Abstract + ( 1318 )   PDF ( 1338KB )   ( 951 ) To select the suitable method for total RNA extraction from the style of Rosa rugosa, and provide foundation for related genetic engineering research, total RNA was extracted with three methods, including modified CTAB, Trizol and EASY spin Plus Plant RNA Kit. And the purity, concentration and completeness were compared by nucleic acid protein detector and gel electrophoresis. The effectiveness of gene amplification of reverse transcription product was checked by RT- PCR reaction. The results showed that the purity, concentration and completeness of total RNA extracted by modified CTAB and EASY spin Plus Plant RNA Kit were higher than that by Trizol. But the bands of total RNA extracted by modified CTAB had serious degradation and the Kit was clear. And the 28S was two times as bright as 18S. The reverse transcription of cDNA obtained for RT-PCR could clearly amplify specificity band. These results demonstrate that the RNA isolated by EASY spin Plus Plant RNA Kit is of sufficient quality and can satisfy subsequent molecular study for Rosa rugosa.

  The Correction of Spring Maize MODIS LAI product Base on the Logisitic Model 2015, 5 (10):  97-102.  DOI: 10.11923/j.issn.2095-4050.cjas15010008 Abstract + ( 1143 )   PDF ( 1372KB )   ( 1022 ) Leaf area index is a key indicator of leaf area change of crop population,and also,an important parameter for studying crop photosynthesis,transpiration,and biomass formation,etc．Base on the Logisitic model, in combination with the field experiment data of leaf area index and developmental stages data of spring maizein Liaoning Province in 2011-2013, the regression model was constructed for the revised MODIS LAI products. The growth of the maize divided into two stages using the anthesis stage, The paper built the Logisitic model to simulate the whole growth period of spring maize, and constructed the various correction model of the MODIS LAI product. The Logisitic LAI was highly significant correlation with the MODIS LAI product, especially for quadratic polynomial model, whose determination coefficient reached to 0.975. Using the field experiment data in 2013, the correction model was tested, the error of MODIS LAI product was depressed from 45% to 10%.

  Analysis on the Change Features of Main External Meteorological Factors Influencing the Solar Greenhouse Production in winter in Shouguang City 2015, 5 (10):  103-108.  DOI: 10.11923/j.issn.2095-4050.cjas15050005 Abstract + ( 1051 )   PDF ( 1397KB )   ( 932 ) This paper aims to provide scientific basis about meteorological theory for the sustainable development of the production in solar greenhouse in Shouguang City. Through statistic analysis on several external meteorological factors such as the winter air temperature from 1959 to 2014, sunshine duration, wind speed, weather conditions and so on that influence the solar greenhouse production in Shouguang City, it was found that the air temperature was obvious on an increasing trend, and low temperature days were decreasing. It indicated that the cold degree was reducing in winter in Shouguang City, and the abnormal mild months and the years with mild winter frequently occurred, which provided sufficient heat resources for the development of solar greenhouse. The wind speed in winter was on a decreasing trend, which reduced the heat transfer coefficient on the surface of greenhouse and reduced the loss of heat in the greenhouse when the heat inside and outside exchanged. The decrease of sunshine duration and sunny days in winter in Shouguang City and the increase of cloudy days and foggy days were adverse factors for the development of solar greenhouse production, but the decrease of snowing days and increase of temperature made up the diverse effect caused to solar greenhouse production by the decrease of sunshine duration. By comprehensive analysis, the weather conditions for developing the solar greenhouse production in winter in Shouguang City were relatively good.

  The design and application of forest regulation system based on GIS 2015, 5 (10):  109-112.  DOI: 10.11923/j.issn.2095-4050.cjas15050006 Abstract + ( 996 )   PDF ( 2060KB )   ( 746 ) In order to effectively prevent deforestation and enhance forest regulation and promote Chinese agroforestry modernization process, the authors investigated the ways to put GIS system into this field from three aspects: the purpose of system construction, design framework and application. The results showed that using GIS system for forest regulation was feasible and efficient. With the premise of sufficient data, the system’s DEM and remote sensing image could reflect the forest terrain accurately, in order to make the visualization possible. Vector map’s each layer could provide information, such as regional vegetation coverage, road traffic, river systems, residential information, elevation, etc. The system could measure the basic geographical environment of forest region with the three-dimensional modeling function; and also put the information of terrain and the spatial information together with multimedia data, to ensure the efficient use of data. GIS system applied to forest regulation could improve the efficiency of forest regulation and promote the value of forest data.

  Variation Characteristics of Thunderstorm Days and Its Countermeasures in Kazuo County 2015, 5 (10):  113-117.  DOI: 10.11923/j.issn.2095-4050.cjas15030019 Abstract + ( 1024 )   PDF ( 1332KB )   ( 974 ) In order to provide favorable scientific basis for lightning forecasting, lightning prevention and disaster reduction, make a reasonable layout of artificial hail suppression stations, as well as reinforce the effect of hail suppression and rainfall enhancement, the author analyzed the climate features of thunderstorms in Kazuo County based on the county’s conventional surface observation data from 1959 to 2014. The results showed that the annual average thunderstorm days in Kazuo County was 28.1 d, indicating a gradual decrease from the 1990s to 2014 with distinct seasonal and monthly changes which were characterized by a rapid increase from April to June, a gradual decrease from July to September, and a rapid drop in October and November. The highest frequency of thunderstorm emerged between 13:00 and 20:00. The year 1991 witnessed the largest number of thunderstorm days, adding up to 41 d, and the least thunderstorm days appeared in 1961 (12 d). The monthly changes of thunderstorm days in Kazuo County presented a unimodal type with its peak in June, the average starting day was April 23rd, the average ending day was October 6th, and the average duration was 165.8 d. Therefore, studying the variation characteristics and activity patterns of the thunderstorm is of vital significance for strengthening lightning prevention, hail suppression and rainfall enhancement.

  Wang Shuying 2015, 5 (10):  118-124.  DOI: 10.11923/j.issn.2095-4050.cjas15060021 Abstract + ( 1064 )   PDF ( 2502KB )   ( 895 ) Cattle service to farmland is the symbol of traditional agriculture and also a typical behavior of crop farming activities in China. Cattle were meritorious in ancient agriculture as the main productive force. In history, the relationship between cattle and agriculture was very close. The author described the development history of cattle service in ancient agriculture in China, summarized the types of cattle service including plowing land, and pulling carts, kollergang and stone rollers, pointed out the important position of cattle service in ancient agriculture. The study provided reference for improving agroecological environment and enhancing affinity to the nature.

  Policy Mechanisms of Low-carbon Agriculture Development Along the Yellow River Economic Zone in Ningxia 2015, 5 (10):  125-129.  DOI: 10.11923/j.issn.2095-4050.cjas15050011 Abstract + ( 1032 )   PDF ( 1186KB )   ( 747 ) It is proved by the theoretical and practical evidences that a set of systematic policy measures and supporting mechanism is needed and the external conducive environment of the development of low-carbon agriculture should be formed in order to develop low-carbon agriculture. To construct and perfect the longterm policy mechanism of low-carbon agriculture, the authors put forward suggestions such as strengthening the financial support for low- carbon agriculture, improving the agricultural development of carbon sequestration trading mechanism, emphasizing the benefit linking mechanism of farmers on the industrial chain, building a new agricultural management system, establishing and improving mechanisms for agricultural resources and environmental protection.

  Studies on the effect of hollow villages to food security of China in the future 刘光辉,赵文杰 and 2015, 5 (10):  130-134.  DOI: 10.11923/j.issn.2095-4050.cjas15010039 Abstract + ( 1174 )   PDF ( 1206KB )   ( 1134 ) In order to know food security situation under the complex world food security circumstance, it is necessary to analyze the influencing factors of food security in China. But from the perspective of present rural development condition, labor transfer has caused the emerging of hollow villages in rural China, the main labors working on agriculture has become feminization and aging, which may influence food security in China. The field survey was conducted in 9 villages in Jiangxi, Liaoning, Guizhou and Hebei Province, the main methods were participatory rural appraisal and questionnaire survey. The results showed that hollow villages were facing some challenges such as the increase of abandoned cultivated land, poor circulation of cultivated land, insufficient application of agricultural science and technology and so on. To solve these problems, township enterprises should be developed, investment on agricultural science and technology should be increased and agricultural industrialization development should be promoted.

  Analysis of the factors affecting consumption growth in Heilongjiang Province 2015, 5 (10):  135-140.  DOI: 10.11923/j.issn.2095-4050.cjas15070009 Abstract + ( 1053 )   PDF ( 1329KB )   ( 889 ) The study aims to respond to environmental changes at home and abroad, and promote the economy of Heilongjiang Province toward a consumption- led economic growth model. In this paper, based on the economic data of Heilongjiang Province over the years, the authors used the OLS method to study factors affecting the consumption growth. The results showed that, at present, to improve the urbanization rate and narrow the income gap between urban and rural areas could effectively stimulate consumption growth in Heilongjiang Province, thus to raise the economic growth rate. The authors also put forward recommendations on this basis.