Effect of returning rape straw to the field on soil nutrient supply

doi:10.14088/j.cnki.issn0439-8114.2020.20.011

Abstract

Abstract: In order to study the effect of rape straw returning to the field on soil nutrients under the condition of no tillage, different amount of rape straw returning to the field was set through pot and continuous field experiments to explore the effect of rape straw returning to the field on straw decomposition rate and nitrogen and phosphorus content in different soil layers under the condition of no tillage. The results showed that the amount of returning field had no significant effect on straw decomposition. The final straw decomposition rate was the highest when the whole amount was returned to the field. The highest nitrogen and phosphorus content was found in the tillage layer after the straw was returned to the field. The effect of continuous straw returning on nitrogen supplement of tillage layer was greater than that of phosphorus. Long term straw returning can reduce the content of nitrogen and phosphorus under the bottom of plough, reduce the loss of nutrient leakage, reduce the waste of resources and environmental pollution.

Key words: rape, straw returning, soil nutrients, compensation, leakage

CLC Number:

S158
S565.4

HUANG Yi-qiong, LIU Rong, ZHAO Chang-kun, SHI Liang, YANG Guo-tao, WANG Xue-chun, HU Yun-gao. Effect of returning rape straw to the field on soil nutrient supply[J]. HUBEI AGRICULTURAL SCIENCES, 2020, 59(20): 51-55.

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