Study And Zoning On Agricultural Climatic Suitability Of Peanuts In Liaoning Province Based On GIS Technology

Peanut as one of the important oil and economic plants,was ranking the third in Liaoning Province only after corn and rice.By the year of 201O,the total peanuts planting area has reached 49.86 million mu(332.4 thousand hectares).With its drought resistance,barren,strong adaptability and high nutritional value,peanut become a preferred choice as drought and disaster prevention crop.In this paper,based on the meteorological data of 1981-2010,from 61 observatories and stations in Liaoning Province,six indicators were selected for zoning agricultural climatic suitability of peanut in Liaoning,according to the actual producing situation.In order to detailed simulate the meteorological elements which are influencing the growth of peanut and then to draw a peanut climatic suitability regionalization map of Liaoning,this study numerically calculated the elements in minor gridding size by GIS(Geographical Information System),and on this basis analyzed the variations of agricultural climatic resources of Liaoning province in the 30 years(1981-2010).The research indicates:1.The simulation and analysis results of the climate resources show that the grid resolution is 500m×500m.Sociated with variables of the terrain factors,the spatial prediction model of four major agricultural climatic resources elements and six peanut zoning indexes in Liaoning Province was established by the mixed interpolation method.The characteristics of inter-annual and inter-decadal variation and spatial distribution of each factor in 30 years are analyzed.2.Agricultural climate resources analysis shows the overall trend is warming in Liaoning Province in the past 30 years.The change rate of annual mean temperature is 0.3?/10 years,the annual mean temperature gradually decreases from southwest to northeast in space.The accumulated temperature also shows an increasing trend,the change tendency is 122.6?/10 years.The annual precipitation is generally reduced,but the change is not obvious;Sunshine hours decrease from the west to the east,the annual change rate is-4.7 hours/year3.The results of peanut planting climate suitability show that the most suitable areas are mainly distributed in the plains and coastal plains of the lower reaches of the Liao River.The more suitable areas are in the transitional areas of the lowland plains to the hills.The suitable areas are mainly distributed in the hilly areas.The mountainous areas are is not suitable for peanut.From the perspective of climate resources,the vast majority of the province is more suitable for planting peanut crops,only a very small mountain area is not suitable.