您好，欢迎访问江西省农业科学院 机构知识库！

Optimizing the bacterial community structure and function in rhizosphere soil of sesame continuous cropping by the appropriate nitrate ammonium ratio

文献类型： 外文期刊

作者： Wang, Ruiqing 1 ; Zhang, Zhihua 1 ; Lv, Fengjuan 1 ; Lin, Hongxin 1 ; Wei, Lingen 1 ; Xiao, Yunping 1 ;

作者机构： 1.Jiangxi Acad Agr Sci, Soil Fertilizer & Resource Environm Inst, Key Lab Crop Ecophysiol & Farming Syst Middle & Lo, Minist Agr, 602 Nanlian Rd, Nanchang 330200, Jiangxi, Peoples R China

关键词： Sesame; Nitrogen; Bacterial wilt; Soil microorganism; High throughput sequencing

期刊名称：RHIZOSPHERE （ 影响因子：3.437； ）

ISSN：

年卷期： 2022 年 23 卷

页码：

收录情况： SCI

摘要： Bacterial wilt has a significant effect on sesame yield, and the appropriate nitrate ammonium ratio (NO3:NH4) can alleviate the occurrence of bacterial wilt. However, its soil micro-ecological mechanism is unclear. We investigated the influences of NO3:NH4 and bacterial wilt on the bacterial community composition and function potentiality of rhizosphere soil in the sesame continuous cropping through high-throughput sequencing. The results indicated that the incidence rate of bacterial wilt was the lowest under the condition of 5:5, and the highest sesame yield was obtained. The relative abundance of Ralstonia had no significant difference among all treatments. Different ratios only had a significant impact on Shannon index, showed a downward trend with the reduction of nitrate ratio, and the alpha-diversity indexes of treatment 5:5 were at the middle level, while the median value of beta-diversity index was at the highest level. Meanwhile, there was 98 unique OTU under treatment 5:5 condition, most of which belonged to phylum Protecbacteria, Bacteroidetes, and Cholorflexi, and that Parafilimonas was the only genus with significant difference. The relative abundances of Acidobacteria and Verrucomicrobe from rhizosphere soil of healthy plants were significantly higher than those from diseased plants, indicating that increasing the relative abundances of these phyla were beneficial for sesame continuous cropping, especially genus Candidatus_Solibacter and Bryobacter. This fertiliser can reduce the pH value (-0.37), while the decrease of pH increased the relative abundance of beneficial bacteria. Furthermore, this ratio (5:5) could significantly improve the replication and repair, cellular process and signalling of rhizosphere soil functions, which was favourable to reduce the occurrence of bacterial wilt. The available potassium, available boron, and pH had a negative correlation with the bacterial community structure in the rhizosphere soil from the healthy plants, and the contribution of these were 13.31%, 10.27% and 7.89%, respectively. Overall, the appropriate NO3:NH4 (5:5) might improve the diversity and structure of bacterial community, and related functions in the rhizosphere soil of sesame continuous cropping, and reduced the occurrence of bacterial wilt.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：江西省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台