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首页> 外文期刊>Applied Microbiology and Biotechnology >Changes in the soil microbial community after reductive soil disinfestation and cucumber seedling cultivation
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Changes in the soil microbial community after reductive soil disinfestation and cucumber seedling cultivation

机译：还原性土壤灭除和黄瓜幼苗栽培后土壤微生物群落的变化

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Reductive soil disinfestation (RSD) has been proven to be an effective and environmentally friendly way to control many soilborne pathogens and diseases. In this study, the RSDs using ethanol (Et-RSD) and alfalfa (Al-RSD) as organic carbons were performed in a Rhizoctonia solani-infected soil, and the dissimilarities of microbial communities during the RSDs and after planting two seasons of cucumber seedlings in the RSDs-treated soil were respectively investigated by MiSeq pyrosequencing. The results showed that, as for bacteria, Coprococcus, Flavisolibacter, Rhodanobacter, Symbiobacterium, and UC-Ruminococcaceae became the dominant bacterial genera at the end of Al-RSD. In contrast, Et-RSD soil involved more bacteria belonging to Firmicutes, such as Sedimentibacter, UC-Gracilibacteraceae, and Desulfosporosinus. For fungi, Chaetomium significantly increased at the end of RSDs, while Rhizoctonia and Aspergillus significantly decreased. After planting two seasons of cucumber seedlings, those bacteria belonging to Firmicutes significantly decreased, but Lysobacter and Rhodanobacter belonging to the phylum Proteobacteria as well as UC-Sordariales and Humicola belonging to Ascomycota alternatively increased in Al- and Et-RSD-treated soils. Besides, some nitrification, denitrification, and nitrogen fixation genes were apparently increased in the RSD-treated soils, but the effect was more profound in Al-RSD than Et-RSD. Overall, Et-RSD could induced more antagonists belonging to Firmicutes under anaerobic condition, whereas Al-RSD could continuously stimulate some functional microorganisms (Lysobacter and Rhodanobacter) and further improve nitrogen transformation activities in the soil at the coming cropping season.
机译：减少土壤中的有害生物（RSD）已被证明是控制许多土壤传播的病原体和疾病的有效且环保的方法。在这项研究中，以茄（Rhizoctonia solani）感染的土壤中使用乙醇（Et-RSD）和苜蓿（Al-RSD）作为有机碳的RSD，以及在RSD期间和种植两个季节的黄瓜幼苗后，微生物群落的差异。用MiSeq焦磷酸测序法分别对RSDs处理过的土壤中的B.结果表明，就细菌而言，副链球菌，黄杆菌杆菌，罗丹杆菌，共生细菌和UC-Ruminococcaceae成为Al-RSD末期的优势细菌属。相比之下，Et-RSD土壤涉及更多的属于Firmicutes的细菌，如Sedimentibacter，UC-Gracilibacteraceae和Desulfosporosinus。对于真菌而言，在RSD结束时Chaetomium明显增加，而Rhizoctonia和Aspergillus则明显减少。在种植了两个季节的黄瓜幼苗之后，属于Firmicutes的那些细菌显着减少，但是属于Al和Et-RSD处理的土壤中的属于溶菌门的Lysobacter和Rhodanobacter以及Ascomycota的UC-Sordariales和Humicola交替增加。此外，在RSD处理的土壤中，一些硝化，反硝化和固氮基因明显增加，但Al-RSD的作用比Et-RSD的作用更深。总体而言，在厌氧条件下，Et-RSD可以诱导更多属于Firmicutes的拮抗剂，而Al-RSD可以连续刺激某些功能性微生物（溶杆菌属和Rhodanobacter）并在未来的种植季节进一步提高土壤中的氮转化活性。

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