Short-Term Fallow in Rotation Improve Soil Fertility and Yield of Brassica napus

文献类型： 外文期刊

第一作者： Wang, Jian-Guo

作者： Wang, Jian-Guo;Wang, Jian-Guo;Lu, Zhan-Yuan;Zhao, Xiao-Qing;Cheng, Yu-Chen;Zhang, De-Jian;Wu, Hai-Ming;Zhao, Yu-He

作者机构：

关键词： Brassica napus; Crop rotation; Bacteria diversity; Short-term fallow; Soil fertility

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： 2020 年 24 卷 6 期

页码：

收录情况： SCI

摘要： Fallow and rotation are important farming practices, which can restore soil productivity. Short term fallow in crop rotation is necessary for sustainable management of soil fertility. Therefore, this study was conducted to evaluate the effects of three cropping systems i.e., Brassica napus continuous cropping (BB), wheat-B. napus rotations (WB), and wheat-short-term fallow-B. napus (WFB) on soil organic matter, soil physical and chemical properties, soil enzyme activity and brassica yield. In addition, the 16S rRNA amplified fragments were sequenced on an Illumina Hiseq 2500 to reveal the bacterial diversity and community structure under abovementioned cropping system. The results showed that WFB (wheat-short-term fallow-brassica) cropping system significantly improved soil organic matter, total nitrogen and total phosphorus contents compared with BB (continuous brassica rotation) in both years of study. Brassica plants under WFB rotation had higher plant height, effective branching position and yield compared with BB and WB rotation. The 16S rRNA sequencing generated data showed that WFB rotation had more bacteria diversity than WB and BB rotations; and Actinobacteria, Proteobacteria, Bacteroidetes, Firmicutes and Acidobacteria were the dominant phyla. The increase in total nitrogen was mainly due to the accumulation of Proteobacteria bacteria. At genus level, beneficial genera including Sphingomonas, Arthrobacter, Bacillus, Microlunatus, etc. had higher abundance in WFB than WB and BB. In conclusion, crop rotation combined with short-term fallow (WFB) system improved B. napus productivity due to its stronger restoration ability of soil bacterial diversity and soil fertility. (C) 2020 Friends Science Publishers

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