The Effect Relationship Between Nitrogen and Potash Fertilization for Winter Wheat in Middle-High Fertilizer Loamy Soil

doi:10.3321/j.issn:1000-7091.2006.z2.008

Abstract

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 0-20cm depth cultivable soil profile layer.In depth of 0-20cm is larger than 20-40cm.In the depth of 0-20cm,in middle-high fertilizer soil,when N rate is over 300kg/hm² 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 150kg/hm² and in the range of 150-225kg/hm²,the promotion effect of K fertilizer to the release of mineralized N in soil quickly accelerated with the increasing of K rates.

Key words: Winter wheat, Nitrogen fertilizer, Potash fertilizer, Effect

CLC Number:

S158.

HAN Bao-wen, XING Su-li, LIU Meng-chao. The Effect Relationship Between Nitrogen and Potash Fertilization for Winter Wheat in Middle-High Fertilizer Loamy Soil[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2006, 21(S2): 34-37. doi: 10.3321/j.issn:1000-7091.2006.z2.008.

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