Combined foliar and soil selenium fertilizer improves selenium transport and the diversity of rhizosphere bacterial community in oats

被引:0
|
作者
Junhui Li
Wenping Yang
Anna Guo
Sheng Yang
Jie Chen
Yuejing Qiao
Sumera Anwar
Kai Wang
Zhenping Yang
Zhiqiang Gao
Jianwu Wang
机构
[1] Shanxi Agricultural University,College of Agriculture
[2] North China University of Science and Technology,College of Life Sciences
[3] The University of Lahore,Institute of Molecular Biology and Biotechnology
[4] Shanxi Institute of Geological Survey,undefined
来源
Environmental Science and Pollution Research | 2021年 / 28卷
关键词
Se fertilizer; Se content; Oat; Bacterial community; High-throughput sequencing;
D O I
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中图分类号
学科分类号
摘要
Agronomic selenium (Se) biofortification of grain crops is considered the best method for increasing human Se intake, which may help people alleviate Se-deficiency. To investigate the efficiency of agronomic Se biofortification of oat, four Se fertilizer application treatments were tested: topsoil (T), foliar (S), the combination of T and S (TS), and control without Se application (CK). Compared with CK, TS significantly increased the 1000-grain weight, grain yield, Se contents in all parts of oats, contents of soil available N, K, and organic matter by 18%, 8.70%, 19.7–60.2%, 6.00%, 8.02%, and 17.95%, respectively. Leaves, roots, and ears had the highest conversion rate of exogenous Se in S (644.63%), T (416.00%), and TS (273.20%), respectively. TS also increased the activities of soil urease, alkaline phosphatase, and sucrose and the diversity of soil bacterial communities. TS and T increased the relative abundance of bacteria involved in the decomposition of organic matter, such as Actinobacteria, Gemmatimonadetes, Chloroflexi, and Bacteroidetes positively correlated with soil nutrients and enzyme activities, and reduced Proteobacteria and Firmicutes negatively correlated with them, Granulicella, Bacillus, Raoultella, Lactococcus, Klebsiella, and Pseudomonas. Furthermore, TS significantly increased the relative abundance of Planctomycetes, Chlorobi, Nitrospinae, Nitrospirae, Aciditeromonas, Gemmatimonas, Geobacter, and Thiobacter. T significantly increased the abundance of Lysobacter, Holophaga, Candidatus-Koribacter, Povalibacter, and Pyrinomonas. S did not significantly change the bacterial communities. Thus, a combined foliar and soil Se fertilizer proved conducive for achieving higher yield, grain Se content, and improving Se transport, the diversity of rhizosphere bacterial community, and bacterial functions in oats.
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页码:64407 / 64418
页数:11
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