Intensive Simulation Of Agricultural Climate Resources In The Mountainous Area Of Eastern Liaoning Province

Under the background of global warming,climate change has changed agriculture climate resources in terms of quantity,quality and time,spatial distribution,thus affecting the stability of agricultural production.Mountain climate due to its complex terrain,slope,slope to wait for a reason,mountain agricultural climate resources spatial distribution and its development and utilization in the field of study,has become a meteorological,biology,geography discipline at home and abroad research hot topic.To the eastern mountain of Liaoning province as research area,this study using ArcGIS technology,by using the method of climatic data combined with the terrain of the regional agricultural climate resources a fine simulation,analysis of temporal and spatial distribution and change rule,and on this basis the Liaodong hilly agricultural climate resources type are analyzed,in order to Liaodong hilly agricultural climate resources provide certain guiding significance.The results are as follows:(1)The present situation and changing trend of agricultural climate resources from 1961 to 2015 in Liaodong mountain area were analyzed.The study shows that the light resources of the Liaodong mountain area decreased slightly in the 55 years,and the spring contributed the most.The heat resources increased significantly,and the winter contributed the most,especially in the 1980 s.Although water resources have a downward trend,the trend is not significant.And all climate resources have seasonal and regional differences.(2)Through the geographical information technology(ArcGIS)space of fine simulation of agricultural climate resources,established the Liaodong mountainous digital elevation database,slope,slope to the database,database longitude and latitude database,accuracy of100 m.Based on the regression analysis method,the trend surface fitting method and the anti-distance weight method,the calculation model of the main climatic resources in the eastern Liaoning mountainous region was established,and the raster data of each agricultural climatic resource element was obtained.(3)Based on the results of spatial analysis of agricultural climate resources in the eastern Liaoning mountains,the classification of agricultural climate resources in the eastern Liaoning mountains was carried out.Combined with climatic factors and terrain factors,the study was divided into four major types: warm,mild,cold and cold,and high cold,seven sub-types.Among them,the warm area has low altitude and low slope,which is suitable for planting late ripe varieties and apples.The temperate region is suitable for planting late-maturity varieties,pecans and Chinese medicinal materials such as schisandra chinensis.Cold and cold regions are suitable for planting ginseng and other Chinese medicinal materials.Alpine areas at an altitude of more than 500 m,slope is greater than 35 °,is not suitable for cultivation of crops,should be given priority to with the forestry.