Abstract:

In order to improve the people know climate warming to agricultural production the advantages and disadvantages of the relationship, grasp the main meteorological factors on food production, timely adjust agricultural planting structure, draw on advantages and avoid disadvantages, and to ensure that food to the purpose of the high and stable. Based on the Meteorological information by five Bureau of Meteorology in Shiyang River Basin from 1970 to 2009.1970-1989 for the first 20 years,1990-2009 years for the latter .Statistics the data of average temperature, precipitation, accumulated temperature, frost-free period and other relevant data in Year, month, spring (March to May), summer (June to August), autumn (September to November) and winter (November to February) four seasons, contrasted the first 20 years, with the latter 20 years. The average temperatures has increased by 1.0℃ that compared the latter 20 years to the first 20 year, and the warming spring > winter > summer and autumn. The average precipitation increased by 5.7 mm in recent 20 years .In the month location of the precipitation, decreased by 7.1 mm in June and increased by 4.4 mm in July averagely .The space-time location of the precipitation is not well balanced, In addition, there was a significant increase of the effective accumulated temperature and the frost-free period in recent 20 years, agricultural planting structure has changed. The sown areas of thermophilic crops such as corn, grape, cotton further expanded, the sown area of the happy cool crops like as the spring wheat, the spring rape reduces year by year. After wheat harvest, the restrictive affection of heat to intercropping, multiple cropping varieties greatly increase. The development trend of local agricultural production from one crop a year to two crops a year.