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1试验目的为了获得阿克苏市棉花的最佳施肥量施肥比例、施肥时期、施肥方法,摸清土壤养分校正系数、土壤供肥能力,不同作物养分吸收量和肥料利用率等基本参数,为阿克苏市构建作物施肥模型,施肥分区和肥料配方提供依据。2试验地基本情况与设计2.1试验材料供试作物棉花,品种为中棉44号,供试肥料46%的尿素,46%的过磷酸钙,50%的硫酸钾。2.2试验设计试验设氮、磷、钾3个因素,4个水平,14个处理,0水平指不施肥,2水平为最佳施肥量,1水平=2水平×0.5,3水平=2水平
Aims of the experiment In order to obtain the optimum fertilization rate, the fertilization time, the fertilization method, the soil nutrient correction coefficient, the soil fertility, the nutrient uptake of different crops and the fertilizer utilization rate of the cotton in Aksu City, Provide the basis for constructing crop fertilization model, fertilization division and fertilizer formula. 2 Experimental conditions and design of the test site 2.1 Test materials Cotton crop for the trial, the variety of cotton 44, 46% of urea fertilizer for testing, 46% of superphosphate, 50% of potassium sulfate. 2.2 Experimental design The experiment set nitrogen, phosphorus and potassium three factors, four levels, 14 treatment, 0 refers to no fertilization, 2 levels for the best amount of fertilizer, 1 level = 2 level × 0.5,3 level = 2 level