College of agronomy, Hunan Agricultural University, Changsha 410128, China
School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Key laboratory of Biometallurgy, Ministry of Education, Changsha 410083, China
: Received: 16 September 2016 / Approved: 18 September 2016 / Online: 18 September 2016 (08:56:53 CEST)
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How to cite:
Yang, H.; Niu, J.; Tao, J.; Gu, Y.; Zhang, C.; She, S.; Chen, W.; Yang, H.; Yin, H. The Impacts of Different Green Manure on Soil Microbial Communities and Crop Health. Preprints2016, 2016090056 (doi: 10.20944/preprints201609.0056.v1).
Yang, H.; Niu, J.; Tao, J.; Gu, Y.; Zhang, C.; She, S.; Chen, W.; Yang, H.; Yin, H. The Impacts of Different Green Manure on Soil Microbial Communities and Crop Health. Preprints 2016, 2016090056 (doi: 10.20944/preprints201609.0056.v1).
Green manure could improve soil nutrients and crop production, playing a significant role in sustainable agriculture. However, the impacts of green manure on crop health and the roles soil microbial communities play in the process haven’t been clarified clearly yet. In this study, we investigated soil microbial community composition and structure in four tobacco farmlands, which were treated with different green manure (control, ryegrass, pea and rape), using 16S rRNA gene amplicons sequencing. Results showed that green manure had significant impacts on soil properties, microbial communities and tobacco health. First, soil total C, N and Ca content increased significantly in groups treated with green manure than control. Second, soil community diversity was significantly higher in groups treated with green manure. Third, green manure especially ryegrass, decreased tobacco disease (bacterial wilt) rate dramatically, and the process might be mediated by soil microbial communities. On the one hand, several microbial populations were found to be potentially disease inducible or suppressive. For example, the abundances of Dokdonella and Rhodanobacter were positively correlated to tobacco disease rate, while Acidobacteira_Gp4 and Gp6 had negative correlations with tobacco disease. On the other hand, soil microbial communities were shaped by soil properties (e.g., pH, C and N content). In conclusion, our research showed that green manure could increase soil nutrients directly, and further improve tobacco health mediated by soil microorganisms, which may shed light on revealing interactions among soil properties, microorganisms and plants.
green manure; soil microbial communities; crop health; Illumina sequencing