The Analysis Of Temporal-spatial Variation Of Agricultural Meteorological Resources And Crop Suitability In Beijing,Tianjin And Hebei

Due to natural internal processes and external effects of human activities on the environment,the climate in recent decades,significant changes have taken place.Climate change counterproductive in every aspect of human life and social development,the agricultural industry as one of the most sensitive to climate change industry,which is most affected by climate change significantly.In the context of climate change,should be aware of the law changes in agricultural meteorology resources,we will summarize the changes in the law as a guide for the development of agriculture industry basis,for specific crops and then make reasonable judgments in specific areas.Through time and space for agricultural meteorology resources Beijing Tianjin Hebei temperature,light and rainfall of three indicators analysis,the distribution characteristics of the area of these three indicators of variation in time and space.In time series analysis,using R language as a tool for agricultural meteorology resource time series analysis,time series analysis and forecasting fitting time series.In the analysis of the spatial distribution of the interpolating operation relying on professional meteorological interpolation tools Anusplin,and spatial distribution are arranged in chronological urder,come the change of Space distribation of agricultural meteorology resources over time.On the basis of agro-meteorological analysis of temporal and spatial variation of resources,combined with Beijing,Tianjin area maize,winter wheat growth period of these two crops grown individually appropriate threshold established suitability models with different crops in different growth stages,and thus on crops planting area The suitability evaluation,and by comparing different years,were to determine the appropriate circumstances change with time.With the results obtained as a basis to play a guiding role of science in agricultural production,adjustment and other aspects of crop area.The main research results obtained are as follows:(1)Agricultural Meteorology resource variation over time,as well as changes in the law as the basis for different agro-meteorological resources index values predicted for future years.(2)The distribution of agricultural meteorology resources on space and spatial distribution of different years arranged analysis,the spatial distribution of agricultural meteorology resources change characteristics change over time.(3)In different regions of Beijing,Tianjin and Hebei summer maize and winter wheat,respectively,a grid for the evaluation unit at the county level and suitability evaluation results of the evaluation unit,by comparing the results of different years,suitability evaluation,obtained the appropriate degree of variation in different regions.