Study On Index Of Fertilizer Recommendation For Winter Wheat In Xianyang Irrigated Area

Wheat is an important food crop in the world about35%of the population of wheatgrain. Fertilizer in China’s grain production, food security plays an important role, butfertilizer in China’s contribution to food production was only about30%[1], far below thelevel of developed countries in Europe and America (50%to60%)[2], over the years the areablindly extensive use of fertilizers, leading to imbalance of soil NPK fertilization efficiencydecreased, weight gain does not increase, fertilizer utilization rate. Fertilizer recommendationsare based on crop fertilizer characteristics, soil properties and fertilizer effect for fertilizer,fertilizer made technical recommendations. To solve the low utilization rate of effectivefertilizer, soil nutrient imbalance.In this study, winter wheat as test material, the layout of irrigation area of7counties inXianyang for3years112points of the "3414" fertilizer experiment results of statisticalanalysis, in order to find out the regional wheat NPK fertilization effect, recommendedfertilization model for local wheat production, to determine the optimum amount of fertilizerand soil nutrient index, and the eventual establishment of Fertilization Index System forwinter wheat in Xianyang irrigation area.The main results obtained are as follows:1. Study area wheat N, P2O5, K2O agronomic efficiency average was5.7g/kg,5.6g/kg,5.5kg/kg, respectively, the average increase rate was25.1%,14.7%,7.9%;2. The Xianyang irrigation system of winter wheat nitrogen phosphorus potassium ofsoil nutrient index.3. Establishing the fertilization model between content of soil available nutrient andfertilizer amount.It was as followed: F (N)=-12.404ln (N)+62.304; F (P2O5)=-2.7366ln (P)+14.647; F (K2O)=-2.6247ln (K)+18.012. Confirming the optimum amount of fertilizernitrogen, phosphorus, potassium in winter wheat under different fertility level.4. On the basis of the above results in Xianyang irrigation area of Winter WheatFertilization Index system was established, and the reference of agricultural productionexperience and cost, make Xianyang irrigation of Winter Wheat Fertilization guidancescheme.