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Ma K, Wang Y, Jin X, Zhao Y, Yan H, Zhang H, Zhou X, Lu G, Deng Y. Application of Organic Fertilizer Changes the Rhizosphere Microbial Communities of a Gramineous Grass on Qinghai–Tibet Plateau. Microorganisms 2022; 10:microorganisms10061148. [PMID: 35744666 PMCID: PMC9228633 DOI: 10.3390/microorganisms10061148] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 05/29/2022] [Accepted: 05/30/2022] [Indexed: 12/02/2022] Open
Abstract
The effects of organic fertilizer application on the soil microbial community in grassland systems have been extensively studied. However, the effects of organic fertilizers on the structure of rhizosphere microbial communities are still limited. In this study, the diversity and composition of rhizosphere microbial communities of a gramineous grass Elymus nutans under organic fertilizer treatment were studied in an artificial pasture on Qinghai–Tibet Plateau. After a growing season, the application of organic fertilizer not only increased the height and biomass of Elymus nutans, but also changed the rhizosphere microbial compositions. In particular, organic fertilizer increased the diversity of rhizosphere bacterial community and inhibited the growth of pathogenic bacteria such as Acinetobacter, but the opposite trend was observed for the diversity of fungal community. The assembly process of fungal community was changed from a stochastic process to a deterministic process, indicating that selection was strengthened. Additionally, both the infection rate of arbuscular mycorrhizal fungi (AMF) toward host plants and the development of AMF-related structures were significantly increased after the application of organic fertilizer. Our study demonstrated that the addition of organic fertilizer to artificial pasture could improve the growth of grass through the alteration of the rhizosphere microbial communities. Organic fertilizer had a greater selectivity for the bacterial and the fungal communities that enhanced the niche filtration in this community, further benefiting the yield of forages.
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Affiliation(s)
- Kun Ma
- Collage of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China; (K.M.); (Y.W.); (X.J.); (Y.Z.); (H.Y.); (H.Z.); (X.Z.)
| | - Yingcheng Wang
- Collage of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China; (K.M.); (Y.W.); (X.J.); (Y.Z.); (H.Y.); (H.Z.); (X.Z.)
| | - Xin Jin
- Collage of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China; (K.M.); (Y.W.); (X.J.); (Y.Z.); (H.Y.); (H.Z.); (X.Z.)
| | - Yangan Zhao
- Collage of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China; (K.M.); (Y.W.); (X.J.); (Y.Z.); (H.Y.); (H.Z.); (X.Z.)
| | - Huilin Yan
- Collage of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China; (K.M.); (Y.W.); (X.J.); (Y.Z.); (H.Y.); (H.Z.); (X.Z.)
| | - Haijuan Zhang
- Collage of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China; (K.M.); (Y.W.); (X.J.); (Y.Z.); (H.Y.); (H.Z.); (X.Z.)
| | - Xueli Zhou
- Collage of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China; (K.M.); (Y.W.); (X.J.); (Y.Z.); (H.Y.); (H.Z.); (X.Z.)
- Experimental Station of Grassland Improvement in Qinghai Province, Gonghe 813000, Qinghai, China
| | - Guangxin Lu
- Collage of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China; (K.M.); (Y.W.); (X.J.); (Y.Z.); (H.Y.); (H.Z.); (X.Z.)
- Correspondence: (G.L.); (Y.D.); Tel.: +86-10-62840082 (Y.D.)
| | - Ye Deng
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China
- Correspondence: (G.L.); (Y.D.); Tel.: +86-10-62840082 (Y.D.)
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