Journal ArticleDOI
Changes in the soil microbial community after reductive soil disinfestation and cucumber seedling cultivation
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TLDR
Reductive soil disinfestation could induced more antagonists belonging to Firmicutes under anaerobic condition, whereas Al-RSD could continuously stimulate some functional microorganisms and further improve nitrogen transformation activities in the soil at the coming cropping season.Abstract:
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.read more
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Biodiversity of key-stone phylotypes determines crop production in a 4-decade fertilization experiment
TL;DR: This work uses multitrophic ecological networks to investigate the importance of soil biodiversity, in particular, the biodiversity of key-stone taxa in controlling soil functioning and wheat production in a 35-year field fertilization experiment, and provides a list ofKey-stone phylotypes linking to crop production and soil nutrient cycling, which could give science-based guidance for sustainable food production.
Journal ArticleDOI
Interactions of plant growth-promoting rhizobacteria and soil factors in two leguminous plants.
TL;DR: Soil pH, P and K significantly affected the composition of the soybean rhizomicrobiome, whereas soil pH and N had a significant effect on the alfalfa rhizome, and the rhizomes assemblage and plant growth-associated microbes are differentially structured by soil properties and leguminous plant species.
Journal ArticleDOI
Effects of cover crop in an apple orchard on microbial community composition, networks, and potential genes involved with degradation of crop residues in soil
TL;DR: The relative abundances of potential genes involved with the degradation of cellulose, hemicellulose, and cello-oligosaccharides increased significantly with the cover crop, therefore, the SOC and TN contents were enhanced by the covercrop with the increase of the soil enzyme activities.
Journal ArticleDOI
Role of anaerobic bacteria in biological soil disinfestation for elimination of soil-borne plant pathogens in agriculture.
TL;DR: Reports suggest that antifungal enzymes produced by predominant anaerobic bacteria grown in the BSD-treated soil play important roles to control soil-borne fungal pathogens.
Journal ArticleDOI
Highly connected taxa located in the microbial network are prevalent in the rhizosphere soil of healthy plant
TL;DR: It is reported that the keystone taxa and members in the central module were enriched in the rhizosphere soil of healthy plants, which might be a potential indicator for the soil supporting plant health.
References
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QIIME allows analysis of high-throughput community sequencing data.
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