Soil Fertility Evaluation & Improvement Measures Of Walnut Orchards In Wushi County, Xinjiang

Walnuts make an important role of the South Xinjiang Basin. However, due to lacking for scientific fertilization recognition, fertility has become the main limiting factor for production garden by fertilizing and soil nutrient management. Wushi County Wushi, Xinjiang was taken as the research object, 120 sample gardens in 8 main walnut-cultivated countrys were selected for soil samples survey research, the field sampling and analysis of laboratory experiments has been used. I also do some research on nutrient concentrations, build soil fertility evaluation index(SFI) model by analysis of the principal component analysis(PCA) method for soil fertility evaluation. On this basis, to exploration the way of improving soil fertility. Meanwhile, comparing the affect of soil nutrients content under different fertilization, and depending on the result to make some theoretical guidance to Wushi County fertilization, avoid blind fertilization. The main results were as follows:Wushi County soil nutrient content has some difference, the same area of soil there are also differences in their nutrient concentrations in the vertical direction. Through assay Wushi County 120 Walnut Park production of 13 elements nutrient content, know that except for Ca, Mg, Zn nutrient content of soil Wushi County garden, the vast majority of walnut gardens OM, TN, TP, TK, AN, Fe, Mn, Cu nutrient deficiencies or lack of content, there are about half of the soil AP walnut production Park, AK inadequate nutrient content or lack of.According to characteristics of soil nutrient content, construct soil fertility evaluation model,The orchards with "low" soil fertility accounted for vast majority, nearly two-thirds, and with "medium" soil fertility accounted for less than one third, and with "high" soil fertility accounted for a small amount, only scattered, high fertility gardens account for only 7.9%.To study the influence of orchard soil fertility improvement, determination of soil nutrient indicators, application SFI enhance soil fertility evaluation model to assess the role of this method is adopted to enhance the application of diesel, bio black carbon approach. Conventional fertilization ratio of organic materials(oil residue,Biological Carbon) to make significant changes in soil nutrient content, soil fertility significantly enhance the differences between the different treatments. Screening can effectively improve soil fertility fertilization as: oil 1800.0 kg/667 m2, urea(including N 46%) 73.5 kg/667 m2, triple superphosphate(including P2O5 46%) 28.7 kg/667 m2, potassium sulfate(containing K2 O 51%) 10.6 kg/667 m2; black biological 3700.0 kg/667 m2, urea(including N 46%) 73.5 kg/667 m2, triple superphosphate(including P2O5 46%) 28.7 kg/667 m2, potassium(including K2 O 51%) 10.6 kg/667 m2.