Title: The Effect Relationship Between Nitrogen and Potash Fertilization for Winter Wheat in Middle-High Fertilizer Loamy Soil
Abstract: According designing field experiment of two factors and four levels for nitrogen(N) and potassium(K) in winter wheat,this paper analyzed the effect relationship between N and K fertilization in winter wheat in middle-high fertilizer loamy soil environment by the method of piecewise analytic function.The result indicated that the application of N and K are of obviously promotion effect for the releases of available N and available K,and the intensity of the effects are of differences in different soil profiles depth and different fertilization ranges.in 0-20 cm depth cultivable soil profile layer.In depth of 0-20 cm is larger than 20-40 cm.In the depth of 0-20 cm,in middle-high fertilizer soil,when N rate is over 300 kg/hm~2 the promotion effect of N fertilizer to the release of mineralized K in soil quickly accelerated with the increasing of N rates;when K rate is over 150 kg/hm~2 and in the range of 150-225 kg/hm~2,the promotion effect of K fertilizer to the release of mineralized N in soil quickly accelerated with the increasing of K rates.
Publication Year: 2006
Publication Date: 2006-01-01
Language: en
Type: article
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Cited By Count: 1
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