Current issue

• 2015 Vol.5 No.1 Published:29 January 2015

  Application Research of Covering Soil Over Membrane Technology of Spring Potato Cultivation 2015, 5 (1):  1-4.  DOI: 10.11923/j.issn.2095-4050.2014-xb0182 Abstract + ( 1319 )   PDF ( 1298KB )   ( 1117 ) In the process of spring potato shed cultivation, artificial rupture of membrane is needed. Using the cultivation mode of mulching cultivation and the double ridge cultivation during open cultivation, the effect of the time and thickness of covering soil to the emergence rate, the growth period and the commodity rate of potato were measured in order to find suitable cultivation of local potato. When the soil’s thickness was the same and it’s 2 cm above the ground, the highest germination rate and earliest germination time of treatment 7, 8 and 9 were gotten. The emergence rates respectively were 89.24%, 94.97% and 95.33%. The average growth period of treatment 7 and 8 was 86 d, which was the same with the control. There was significant positive correlation between the commodity rate of potato and the emergence rate, growth period and the commodity potato production. The commodity rate of potato was higher than the control. Other treatments showed different degrees of reduction. The reduction range was 6%-65%. The growth period of the treatment 8 was 86d. The commodity rate of potato of the treatment 8 was 96.40%, which was higher than the treatment 8 and the same with the control. The treatment 8 was the best treatment. The results showed that when the potato buds was over 2 cm from the surface, the best overburden thickness was 2-3 cm. The covering soil over membrane over membrane solved the drawbacks of the artificial rupture of membrane. This study had some significance to the sustainable and healthy development of the potato industry.

  Current status, Problems and Countermeasures of wheat and Maize Production in Henan Province 2015, 5 (1):  5-9.  DOI: 10.11923/j.issn.2095-4050.2014-xb0143 Abstract + ( 1659 )   PDF ( 1203KB )   ( 1639 ) Wheat and maize are the main grain crops of Henan province. It is of great significance to ensure national grain security by continuous improving wheat and maize yield. According to the related literature and statistics, this paper analyzed the present situation of wheat and maize production in Henan province. Aiming at messy varieties, poor emergence, unreasonable fertilization, frequent natural disasters and serious plant diseases and insect pests in wheat and maize production, this paper put forward some countermeasures such as high yield varieties breeding, scientific fertilization, comprehensive prevention and control plant diseases and insect pests, maize timely harvest later, wheat a spray three prevention measures and so on, so as to promote wheat and maize yield continue to increase in Henan province.

  The Study on Control Persistently of Wheat Flag Smut 2015, 5 (1):  10-14.  DOI: 10.11923/j.issn.2095-4050.2014-xb0086 Abstract + ( 1093 )   PDF ( 1244KB )   ( 1111 ) Wheat flag smut was the main disease of wheat in north China. Recently, it was recovered and seriously damaged in some areas. To control persistently the devastating disaster caused by the wheat flag smut, resistance-disease identification of varieties and multiple comparison of chemical tests at three sites were conducted. Eleven varieties,‘Jinmai 31’,‘Jinmai 32’,‘Jinmai 33’,‘Linyou 145’,‘Linkang 20’,‘Yunhan 618’,‘Yun 94-32’,‘Yumai 57’,‘Yannong 19’,‘Zhengmai 9023’and‘Jimai 32’, highly resistance or middle resistance to wheat flag smut, were identified from 207 spreading varieties (lines). Using multiplerepetition in three sites, five chemicals, involving triadimenol, triadimefon, carbendazim, thiophanate-methyl and dimethomorph, were selected to substitute for quintozene. The research proved that wheat flag smut can be controlled persistently by chemical seed dressing combined with resistance-disease varieties.

  Survey on Occurrence of the sweetpotato weevil (Cylas formicarius) and preliminary study on its outbreak in Chongqing 2015, 5 (1):  15-19.  DOI: 10.11923/j.issn.2095-4050.2014-xb0396 Abstract + ( 1367 )   PDF ( 1365KB )   ( 1132 ) The occurrence of sweetpotato weevil Cylas formicarius in Chongqing was investigated during 2011 and 2012 in Wushan county, Chongqing for understanding the occurrence characteristics. The larvae, pupae and adults of sweetpotato weevil in tuberous root could overwinter in storage or in open field. The sweetpotato weevil occurred seriously in nursery bed. Therefore, the control of sweetpotato weevil in nursery bed was very important. The damage of sweetpotato weevil was more serious in the field of monoplanting sweetpotato than sweetpotato interplanting with corn. The peak period of adult occurrence was from beginning of August to October. The different generation of weevils was not distinct. The causes of sweetpotato weevil outbreak were its high fecundity, optimum temperature for overwinter and sustain food source in Chongqing area.

  Advances on prevention and control technology of Empoasca vitis G?the in tea garden 2015, 5 (1):  20-24.  DOI: 10.11923/j.issn.2095-4050.2014-xb0395 Abstract + ( 1463 )   PDF ( 1173KB )   ( 1361 ) Tea green leafhopper (Empoasca Vitis G?the), one of major tea pests in mainland China, grows concealed with small size, accelerated reproduetion and overlapped generations, which has become the most serious pest in tea prevention. This paper described the morphological features, damage modes and occurrence characteristics of tea green leafhopper, and primary the main control methods in recent years. Therefore, from pollution-free and green control perspective, a safer and more effective approach for tea prevention to control the number of leafhoppers population, and reduce the yield loss of tea, which had become a hot issue. So this paper can provide a reference in the tea green comprehensive prevention.

  The investigation of the usage of herbicide in Heilongjiang province WANG Hong-Wu,,傅迎春 and 2015, 5 (1):  25-31.  DOI: 10.11923/j.issn.2095-4050.2014-xb0165 Abstract + ( 1318 )   PDF ( 1341KB )   ( 1652 ) A comprehensive understanding of farmland usage of herbicide in Heilongjiang Province, will play an important role in Heilongjiang agricultural production and the improvement of agricultural ecological environment. The author comprehensively and systematically examined the varieties of herbicide used in Heilongjiang, the usage and distribution in parts of the world for the first time, and this survey was for the herbicide pesticide production enterprises and some dealers at home and abroad in the form of questionnaire, which can provide theoretical basis for the reasonable application of herbicide. Herbicide was priority pesticide used in Heilongjiang Province, which was over 85% of the amount of pesticide. The herbicide used in Heilongjiang including 55 kinds of single dose, 41 kinds of mixed dose, and of which there were 34 kinds of single dose and 29 kinds of mixed dose used in dry farmland, there were 21 kinds of single dose and 12 kinds of mixed dose used in paddy field. The amount of herbicide goods was 59504 tons, effective dose was 28693 tons used in Heilongjiang in year 2012, available area was over 3575 million hm2. The amount of herbicide goods increased 11.9%, effective dose increased 7.7%, available area increased 12.9%. Distribution in the whole province: Harbin accounted for 33% , because Harbin was the collection and distribution center or pesticide. The second was the Jiamusi accounted for 22%, and Qiqihar accounted for 17%. Advice to establish standard system of economical and rational use of herbicides, limit and reduce the production and use of long residual herbicides, promote and apply safe and efficient herbicides.

  Molecular Identification and Pathogenicity of Pythium vexans Isolated From Tobacco 2015, 5 (1):  32-36.  DOI: 10.11923/j.issn.2095-4050.2014-xb0479 Abstract + ( 1054 )   PDF ( 1592KB )   ( 1111 ) Pythium was isolated from tobacco stems back rot samples in Song County of Henan Province. In order to know its classification and pathogenicity to tobacco, the morphologic characters that based on microscopy technology were examined and recorded, the rDNA- ITS sequences were analyzed, the pathogenicity tests were conducted. The results showed that the colonies were actinomorphic and gradually grow into petaliform; hyphas were without separate; sporangiums were spherical or pear-shaped; archegoniums were spherical; antheridiums are bell-shaped or irregular. According to the results of the analysis of rDNAITS sequences, the sequence homology was more than 99% when it was compared with the sequence of registration number kc014615.1 and gu133597 in GenBank. Therefore, the pathogen was identified asPythium vexans de Bary. Seedings in ten leaf stage of‘Zhongyan 100’tobacco variety were inoculated withP. vexans de Bary, and the disease symptoms and the disease indexes were surveyed and recorded in the 7th day, the disease index ofPythium vexans was 48 and theP. aphanidermatum was 62.7, the results indicated that the pathogenity ofPythium vexans was less thanP. aphanidermatum.

  Research Progress of Remedying the Heavy Metal Contaminated Soils with Mulberry 2015, 5 (1):  37-40.  DOI: 10.11923/j.issn.2095-4050.2014-xb0350 Abstract + ( 1217 )   PDF ( 1086KB )   ( 1272 ) Remediation of heavy metals has become a hot topic of international environmental science, and remedying the heavy metal contaminated soils with mulberry was an effective phytoremediation technology. This paper briefly introduced the concept of heavy metals in soil and phytoremediation technology, described the growth characteristics of mulberry, and mulberry growing relationship with Cd, Pb, Zn, As and other heavy metals pollution. Combined with the heavy metals pollution situation in Jiangxi Province, and discussed the potential of repair tree in soil heavy metal pollution with mulberry.

  Discussion on Land reclamation suitability evaluation method of Temporary Land use in Railway Construction—A case study in constructing railway from Lian Yun Gang to Yan Cheng 2015, 5 (1):  41-45.  DOI: 10.11923/j.issn.2095-4050.2014-xb0447 Abstract + ( 1273 )   PDF ( 1334KB )   ( 1059 ) As the rapid promoting of our railway construction, the development of Chinese railway have made significant progress, however, ecological influence and land destruction have been caused by the temporary engineering of railway construction, the recovery of the land ecological function become more and more important. How could we recover the temporary land use in railway construction efficiently, the proper land reclamation suitability evaluation is significant to ecological restoration. This research, for example, the land reclamation of constructing new railway from Lianyungang to Yancheng, by the way of together extreme condition method with sum of index method, we could build appropriate evaluation index system and evaluation standard, so as to determine the evaluation grade of main limiting factor, provide the scientific reference for the determining the final land reclamation direction.

  Effects of Amendments on Formation of Water-Stable Aggregates and Supply Capacity of Nutrients in Silty Sand Coastal Soil 2015, 5 (1):  47-50.  DOI: 10.11923/j.issn.2095-4050.2014-xb0464 Abstract + ( 1178 )   PDF ( 1310KB )   ( 1003 ) A pot incubation experiment was conducted to compare the effects of three structure modifiers (polyacrylamide, β-cyclodextrin, and humic acid), used widely at home and abroad, on formation of waterstable aggregates and supply capacity of nutrients in a silty coastal soil. The result showed that application of each of three structure modifiers could improve the formation of water-stable aggregates in the soil, and the amounts of >0.25 mm water-stable aggregates in the soil increased with increasing the rates of the modifiers. The improved effects decreased in the order of polyacrylamide > β-cyclodextrin > humic acid. The optimal dosage of polyacrylamide and β-cyclodextrin for modifying soil structure was about 0.20%. Application of humic acid had no significant effect on supply capacity of nutrients in the soil. However, application of polyacrylamide and β-cyclodextrin could change supply capacity of nutrients in the soil. The soil, added with modifiers after application of chemical fertilizers, had weaker supply capacity of nutrients as compared with control without application of any amendments. While the soil, added with chemical fertilizers after application of modifiers, had stronger supply capacity of nutrients as compared with control.

  Present Situation Analysis and Development Strategy on Flower Seedling Industrialization of Popular Flowers Variety in Beijing 2015, 5 (1):  51-55.  DOI: 10.11923/j.issn.2095-4050.2014-xb0041 Abstract + ( 1119 )   PDF ( 1163KB )   ( 1128 ) Essential factors of flower seedling industrialization were discussed in this paper. The results indicated that the problems of flower industry in Beijing were deficiency of independent intellectual flower variety, incomplete flower industrial linking, unsoundness of law and regulation, simple model of sale, imperfect system of service and standard, and deficient of production-college-research union. Strategies of developing flower seedling industry were suggested, such us reinforcing government regulation, cultivating Beijing- characteristic flower variety, refining industrial division, establishment of flower seedlings quality standard system and certification institutions, developing service system and establishing flower seedling consortium, on the base of the analysis of international flower seedling situation, in order to provide policydecision basis for flower seedling industrialization.

  The seedling Variation of Plus Tree Open Pollination family of Taxus chinensis var. mairei 2015, 5 (1):  56-60.  DOI: 10.11923/j.issn.2095-4050.2014-xb0148 Abstract + ( 1243 )   PDF ( 1306KB )   ( 1076 ) In order to improve the genetic quality ofTaxus chinensis var.mairei , a trial for 1-year-old seedling of T. chinensis var. mairei containing 23 timber type families (included CK) was conducted in Mingxi County of Fujian Province. The results showed that there were significant differences in the seedling height, diameter at ground and the length of the longest lateral branch among the families; there were significant positive correlation between the seedling height, diameter at ground and the length of the longest lateral branch among the families. The 22 plus tree open pollination family seedling traits were significantly better than the CK. The seedling height, diameter at ground and the length of the longest lateral branch had higher broad heritability, medium coefficient of variation and higher genetic gain. 22 plus tree open pollination families breeding seedlings could realize the purpose of genetic improvement.

  Research Advances of Development Cycle about Straw-Edible Fungi 2015, 5 (1):  61-64.  DOI: 10.11923/j.issn.2095-4050.2014-xb0435 Abstract + ( 1010 )   PDF ( 1076KB )   ( 1223 ) Farmland straw used to cultivate edible fungi is the important exemplification for agricultural circular economy. The author summarized the research advances of straw- edible fungi cycle development about cultivation management, fermentation technology and multistage circulation pattern. Straw by multistage circulation effectively, improved agricultural ecological environment; increased the income of peasant way, at the same time, reduced production costs, improved economic returns, provided a really new feasible way for agricultural modernization and new socialist countryside. The main problems about the development of strawedible fungi were analyzed, innovation and utilization technology of straw was the key to program the whole system of straw-edible fungi cycle development, in order to establish a new mode with efficient environmental protection of comprehensive utilization of straw resources to provide a theoretical basis for scientific research relate to the straw-edible fungi.

  Mishima Cattle—The Oldest Bovine Species in Japan—— a ReviewProgress on the Oldest Bovine Species in Japan—Mishima Cattle 2015, 5 (1):  65-72.  DOI: 10.11923/j.issn.2095-4050.2013-xb0812 Abstract + ( 3047 )   PDF ( 2064KB )   ( 767 ) In order to provide the guidance and reference on protection, development and utilization of genetic resources to the local rare bovine species in China, the experience of conservation and utilization on Mishima Cattle in Japan was introduced. The formation process, production and reproductive performances in Mishima Cattle were systematically stated via visiting Yamaguchi University and the Technological Center of Agriculture and Forestry, Yamaguchi Prefecture in Japan, and referring the related data of Mishima Cattle. Mishima Cattle were designated as Japanese‘national natural treasure’in 1928, which was regarded as the oldest Japanese Cattle and the most important bovine resource in Japan. Mishima Cattle had the ability of topquality beef with‘flake meat’. Mishima bull (and/or frozen semen) crossed Holstein cows to produce the hybrids with high yield and high-quality beef. However, Mishima Cattle not only matured later, possessed small body size, low reproduction rate, but also had smaller population size and high inbreeding coefficient. It is practical that Mishima bull and/or frozen semen cross beef and dairy breeds to produce high-quality beef.

  Study on the characteristics and performance of Fujian White Rabbit 2015, 5 (1):  73-76.  DOI: 10.11923/j.issn.2095-4050.2014-xb0351 Abstract + ( 1028 )   PDF ( 1327KB )   ( 1045 ) To evaluate the characteristics and performance of Fujian White Rabbit, its reproduction, growth,feed conversion ratio, and carcass were analyzed. The results showed that, the average number of alive newborn was 5.59, the average litter weight at the 3-week old was 1209.0 g, the average weaning litter size and survival rate at the 4-week old were 5.47 and 97.9%, respectively. The body weights of male and female rabbits at the 13-week old were 1570.91 g and 1525.38 g，and the average daily weight gains at the ages of 4 to 13 weeks were 19.92 g and 19.04 g，respectively, which were not significant (P >0.05). The adult body weights of the male and female rabbits were 2131.02 g and 1957.03 g，it was significant (P <0.01). The body length, chest girth, ear length and ear width differences between the male and female rabbits at the age of 10- week were not significant, nor that at the age of 13-week (P >0.05). The adult body length, chest girth differences between the male and female rabbits were significant (P <0.01). The feed conversion ratio at the ages of 30-day to 90-day was 4.51：1. The percentage of eviscerated yield of the Fujian White Rabbits at the age of 90-day was 49.19%. The contents of the crude protein, crude fat, and amino acid of the muscle of the Fujian White Rabbits at the age of 90-day were 20.54%, 2.20% and 17.62%, respectively.

  A Preliminary Study of Livestock and Poultry Traditional Chinese Medicine Additive’s Pharmacodynamic Evaluation 2015, 5 (1):  77-79.  DOI: 10.11923/j.issn.2095-4050.2014-xb0215 Abstract + ( 973 )   PDF ( 1232KB )   ( 1286 ) Efficacy of science evaluation model of TCM is urgent need to solve in the process of traditional Chinese medicine promotion, this article is based on blood biochemical indexes of the heat stress experiment in dogs, and adopts the method of multivariate statistical analysis, to establish Chinese medicine additive effect linear model. The principle of the model is simple, the application is convenient, and the result is consistent with experiment results.

  The Study of rising temperature on serum non-specific immune in “Shuiyuan NO.1”sea cucumber populations and the cultured sea cucumber populations 2015, 5 (1):  80-85.  DOI: 10.11923/j.issn.2095-4050.2014-xb0269 Abstract + ( 1431 )   PDF ( 1330KB )   ( 1186 ) The experiment studied the change of non-specific immune in rising temperature (16℃, 20℃, 24℃,28℃). The activities of CAT, SOD, POD, LSZ and the content of MDA in Shuiyuan NO.1 sea cucumber and Dalian cultured sea were analyzed. The result show that: (1) in rising temperature,the change of CAT, SOD, POD were trend to increased and to decreased in Shuiyuan NO.1 sea cucumber and Dalian cultured sea cucumber, the activities of CAT were 77.160-151.76 U/mL and 24.617-51.740 U/mL, the activities of SOD were 0.070-0.154 U/mL and 0.056~0.100 U/mL, the activities of POD were 2.360-3.470 U/mL and 1.407-2.407 U/mL. The change of LSZ was first increased and then decreased and increased, the activities of LSZ were: 9.741-30.898 U/mL and 8.554-28.006 U/mL. The content of MDA in Shuiyuan NO.1 sea cucumber was trend to increased, the change of MDA was 42.331-46.563 nmol/mL.The content of MDA in Dalian cultured sea cucumber was trend to decreased and to increased, the change was 46.079-47.329 nmol/mL.(2) In rising temperature, the change of CAT, SOD, POD, LSZ in Shuiyuan NO.1 sea cucumber were more sensitive than in Dalian cultured sea cucumber, and the change of CAT and POD had significant difference (P <0.05). In 28℃, the content of MDA in Shuiyuan NO.1 sea cucumber was significantly less than in Dalian cultured sea cucumber (P <0.05). The study indicated that Apostichopus japonicus (Selenka) could make certain physiological immune response to elevated temperatures, to rid the body of excess free radicals by regulating the immune defense enzyme activity, to protect body from damage caused by environmental change. Shuiyuan NO.1 sea cucumber was more sensitive and had hight adaptation in high temperature than Dalian cultured sea cucumber. The experiment was important to study the high temperature adaptation ofApostichopus japonicus (Selenka) and to promote Shuiyuan NO.1 sea cucumber.

  Discussion on How to Strengthen the Supervision of Tobacco Water Project 2015, 5 (1):  86-90.  DOI: 10.11923/j.issn.2095-4050.2013-xb0762 Abstract + ( 945 )   PDF ( 1228KB )   ( 1078 ) Combined with tobacco industry Dali Xiangyun water project of construction and management experience, according to the tobacco industry in Yunnan Province water project funded by the planning and construction of the discussion is being put into practice in Honghe Shiping defrosts water project construction supervision measures, the key is how to strengthen the supervision and management of the project puts forward some suggestions, in order to promote and safeguard the construction of the project management.

  Analysis of Rice Seedling and Planting Mechanization in Hills and Mountains of Southern China 2015, 5 (1):  91-94.  DOI: 10.11923/j.issn.2095-4050.2014-xb0487 Abstract + ( 983 )   PDF ( 1075KB )   ( 1201 ) Rice seedling and planting mechanization status in hills and mountains of southern China was analyzed in order to provide references to develop rice production mechanization. This paper summarized the problems of rice seedling and planting mechanization, such as the existed rice cultivars have bad suitable for mechanized planting, seedling breeding and obtain soil difficult, excessive sowing rate, re- greening stage prolong, dispersive seedling breeding, the existed transplanter has bad suitable for agronomic production demand of double cropping rice and its price was high. The corresponding solution countermeasures were proposed from the viewpoint of combination of agricultural machinery and agronomy.

  The Present Situation of Potato Harvester and Its Development Trends 2015, 5 (1):  95-99.  DOI: 10.11923/j.issn.2095-4050.2014-xb0356 Abstract + ( 1378 )   PDF ( 1850KB )   ( 1347 ) The potato is one of the major crops in our country which has very big planting areas, high yield and strong adaptability, it has very high economic value and practical value in food and industry fields, therefore the potato production has great market prospects, harvesting the potatoes has become an important task. In this paper, through the introduction and contrast about main types and application status of potato harvest machinery at home and abroad, it stated emphatically the development trend of the potato harvest and the problems we were facing in our country, and pointed out that the application of mechanization and automation of potato harvest machinery would greatly improve the efficiency of potato harvesters, reduce working intensity, also it could improve potato industry in China economy.

  Preliminary Study on County Level Animal Husbandry MIS in Semi-arid and Semi-desert Region 韩磊, and 2015, 5 (1):  100-105.  DOI: 10.11923/j.issn.2095-4050.2013-xb0974 Abstract + ( 1139 )   PDF ( 1392KB )   ( 1231 ) Developing an animal husbandry management information system for scientific management of animal husbandry and rational utilization of grassland resources has become an urgent need in achieving efficient management and sustainable development of animal husbandry in semi-arid and semi-desert region. In view of combating grassland-desertification, this paper proposed a technical route and a practical way for developing the animal husbandry management information system (MIS) based on 3S technology. The objectives and principles for establishing the database of this system was elaborated. Meanwhile, the structure, technical feasibility of the system and system function was designed preliminarily. 3S technology develops rapidly, however, currently there was no developed MIS for the area of grassland animal husbandry management, this study demonstrated a realistic significance for the final establishment of this animal husbandry MIS in the future.

  Design, Implementation and Demonstration of the Android Version of Agro-Technique Extension Information Platform 2015, 5 (1):  106-114.  DOI: 10.11923/j.issn.2095-4050.2014-xb0340 Abstract + ( 1127 )   PDF ( 2425KB )   ( 793 ) The Android version of agro-technique extension information platform which further enriched the means of agro-technique extension targeted for the agro-technique extension workers. The functions of farmer service, information submission and experience sharing were designed with mobile intelligent equipment characteristics. This paper reviewed the design idea of the Android terminal mobile application; the character processing, image processing, audio processing, terminal control, communication interaction function was explained briefly. In the process of demonstration, the demonstration point determination, demonstration member selection, the mobile terminal equipment, communication flow setting, training in the use of mobileapplications and user feedback response were all indispensable link and need to pay enough attention to.

  Intellectual Property Protection Strategy of China's agricultural research institutions——Intellectual property protection of cucumber as an example 2015, 5 (1):  115-118.  DOI: 10.11923/j.issn.2095-4050.2014-xb0765 Abstract + ( 945 )   PDF ( 1217KB )   ( 980 ) Intellectual property protection plays a crucial role in promoting the development and upgrading of China’s modern seed industry. This paper analyzed the domestic cucumber patent information, and reached conclusion that cucumber breeding was a major area which researchers were concerned. Especially biotechnology breeding had become a hot topic. With the increasing emphasis on cucumber intellectual property protection, competition between the research institutions was increasingly fierce. Now, disorder seed market, both domestic and international more competitive, unformed healthy functioning mechanisms of intellectual property protection existed still. In view of this, we should focus on property management and rights protection, gived priority to prevention, and took effective control measures and technical means to protect cucumber intellectual property.

  Summary of the Effects of Climate Change on Crop Production Potential 2015, 5 (1):  119-123.  DOI: 10.11923/j.issn.2095-4050.2014-xb0508 Abstract + ( 1099 )   PDF ( 1143KB )   ( 1283 ) The study of the crop production potential can provide the basis for increasing crop yields,evaluating food production capacity and population carrying capacity of the region, as well as rational agricultural production planning. Climate change (including temperature, precipitation, and sunshine hours) and extreme weather (such as drought, floods and storms etc.) has exerted a profound impact on agriculture. This article summarized the research methods of climate change on crop production potential domestic and foreign, and the effects of climate change on China’s major grain crop (wheat, rice and maize) potential production, and analyzed the existing problems and prospect in the present studies, aiming at providing a theoretical basis to climate change adaptation and crop production potential boost.

  SWOT Analysis of Tropical crop New variety Research and Development of China in Context of Implementing UPOV “Convention 1991” 2015, 5 (1):  124-129.  DOI: 10.11923/j.issn.2095-4050.2014-xb0382 Abstract + ( 1529 )   PDF ( 1289KB )   ( 1107 ) The development process of UPOV Conventions was firstly reviewed in this paper, and the new variety protection status of tropical crops in China also briefly introduced. SWOT analysis adopted to analyze the strength, weakness, opportunity and threat in Chinese tropical crops breeding implementing the UPOV “Convention 1991”. The strength was abundant resources, important role of tropical crops, present breeding achievement, a broad market prospect, meanwhile, the weakness was lack of germplasm resources reverse, less of new variety property, unreasonable breeder structure, less input, weak consciousness. The opportunity was giving full play resources advantage, fosteing enthusiasm on new variety breeding, optimizing breeder structure, improving breeding level, strengthening the new variety protection international corporation. The challenge we face was strictly intellectual property striations, weak fields’impact, and restriction of farmer privilege. Four suggestions of breeding in Chinese tropical crops were put forward implementing the UPOV“Convention 1991”

  Extreme Temperature Variability in Tianshui over the past 63 years 2015, 5 (1):  130-133.  DOI: 10.11923/j.issn.2095-4050.2014-xb0407 Abstract + ( 922 )   PDF ( 1382KB )   ( 1130 ) Evaluation of extreme temperature changes in Tianshui under global warming is studied based on annual extreme temperature data from 1951 to 2013. To better understand the variability and long-term trend of extreme temperature, various mathematical statistics methods, including the climate tendency rate, climate tendency coefficient, percentile threshold value method and slidingT -test method, have been used. Results indicate that annual extreme temperature showed a significant increase trend over the past 63 years. The extreme high-temperature rate of increase is estimated as 0.2℃/10 a, while the extreme low-temperature increased by 0.3℃/10 a, which are all statistically significant at 99% confidence level. The threshold values of temperature extremes have been determined using the percentile threshold value method, we find that the difference between the extreme high-temperature (extreme low-temperature) and the corresponding threshold value increased (decreased) with the length of time series. The temporal characteristics of extreme hightemperature and extreme low-temperature trends are analyzed by using sliding T-test method. There is no significant abrupt change in extreme low-temperature at 99% confidence level. In contrast, the extreme hightemperature changes abruptly in 1983 and 1993.

  The Performance Management Influence Factor Analysis of the Modern Agricultural Industry Technology System of Beijing Innovation Team 胡宝贵 2015, 5 (1):  134-140.  DOI: 10.11923/j.issn.2095-4050.2014-xb0815 Abstract + ( 1075 )   PDF ( 1371KB )   ( 1247 ) In order to further strengthen the performance management of the Beijing innovation team of modern agricultural industry technology system, this article is based on the questionnaire survey which involved in all members of the Beijing innovation team. Using the PCA method to analyze the factors which influence the performance management of Beijing innovation team, studying out system design and management, goal-management, members' competence, members' quality and process management are the key factors to influence the performance management. The system design and management is the most important factor, followed by the consistency of objectives, members of competence, again is the quality of the members and daily management. According to the role and problems of various factors, proposing some policy suggestions to improve team performance management, for example, perfecting the team system design, setting clear goals, establishing effective communication mechanism, strengthening the construction of team members’ quality and so on.