Effect of Crop Rotation and Continuous Cropping on Nitrogen Mineralization Characteristics in Yellow Cornfield

文献类型： 外文期刊

第一作者： Jiang Yuzhou

作者： Jiang Yuzhou;Wang Peng;Liu Qingli;Zhang Yungui;Li Zhihong;Zou Yan;Zhu Jingwei;Shi Junxiong

作者机构：

关键词： Maize field; N mineralization; Crop rotation; Continuous cropping

期刊名称：INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY （ 影响因子：0.822； 五年影响因子：0.906 ）

ISSN： 1560-8530

年卷期： 2018 年 20 卷 5 期

页码：

收录情况： SCI

摘要： In order to find out the characteristics of soil nitrogen (N) mineralization in corn field under rotation and continuous cropping in yellow soil area, Soil N mineralization and cultivation were studied by in situ culture method. Three treatments were established to study the effects of crop rotation and continuous cropping on soil N mineralization change characteristics during corn growth season, which are non-fertilization + tobacco-corn rotation (CK), conventional fertilization + tobacco-corn rotation (CR) and conventional fertilization + continuous cropping of corn (CC). The results showed that the early growth of maize (May 20) showed N fixation, while the late growth (July 15) showed N mineralization. The highest values of soil net ammonification rate, net nitrification rate and net N mineralization rate of all treated maize fields appeared in the later stage of crop growth, ranging from 0.12-0.15, 0.69-0.83 and 0.83-0.98 mg.kg(-1).d(-1). During the whole growing period of maize, the rate of net ammonification was the highest in rotation. In the middle stage of maize growth, the net nitrification rate and net mineralization rates of rotation were higher than those of continuous cropping. In the later period of corn growth, the net nitrification rate and net mineralization rates of continuous cropping were higher than those of rotation. In rotation, the promotion rates of nitrification and N mineralization in soil were 3.04 and 6.08 times higher than those in rotation respectively. What's more, the rotation could contribute to the N mineralization earlier appearance in corn field. Correlation analysis showed that the rate of net N mineralization under treatment of conventional fertilization + rotation cropping was related to soil nitrate content (P < 0.05), and the net N mineralization rate under treatment of continuous cropping was unaffected by the local soil moisture content. As a result, crop rotation plus conventional fertilization is conducive to improve and promote soil N mineralization in yellow corn field. Therefore, reasonable rotation is an important way to improve N mineralization in yellow soil corn field. (C) 2018 Friends Science Publishers

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