Dynamic changes of soil nitrogen under tobacco-rape rotation and balanced fertilization

doi:10.14088/j.cnki.issn0439-8114.2022.15.015

Abstract

Abstract: In order to explore the dynamic changes of soil nitrogen under tobacco-rape rotation and balanced fertilization, a two-factor complete design, which included the main factors （winter fallow, Chongrongyou 1, Deyouzao 1 and GSX-1） and by-factors （conventional fertilization, nitrogen reduction and phosphorus increase）, was adopted to analyze contents of soil alkali hydrolyzed nitrogen and ammonium nitrogen in rape and tobacco seasons. The results showed that tobacco-rape rotation could increase the contents of soil alkali hydrolyzed nitrogen and ammonium nitrogen in different degrees, and the effect was most significant in the early stage of rape transplanting （30 d）. With the development of rape growth period, the effect of rotation on soil nitrogen content decreased sharply, and the overall performance was as follows： Chongrongyou 1>Deyouzao 1>GSX-1>winter fallow. During the whole growth period of tobacco, except for some treatments, the contents of alkali hydrolyzed nitrogen and ammonium nitrogen in other soils decreased by 8.65%~64.26% and 5.41%~77.51%, respectively. Under all the main treatments, soil nitrogen content was the highest in the phosphorus increase. In conclusion, the nitrogen content was relatively high when Chongrongyou 1 rape combined with tobacco rotation and phosphorus increase, which was a good local cropping system.

Key words: tobacco-rape rotation, balanced fertilization, alkali hydrolyzed nitrogen, ammonium nitrogen

CLC Number:

S158.3

ZHANG Qi-li, XIAO Ling, LI Tao, MA Wei, HE Ji-xian, GU Hui-zhan. Dynamic changes of soil nitrogen under tobacco-rape rotation and balanced fertilization[J]. HUBEI AGRICULTURAL SCIENCES, 2022, 61(15): 98-102.

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