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首页> 外文期刊>Scientific reports. >Different responses of rhizosphere and non-rhizosphere soil microbial communities to consecutive Piper nigrum L. monoculture
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Different responses of rhizosphere and non-rhizosphere soil microbial communities to consecutive Piper nigrum L. monoculture

机译：根际和非根际土壤微生物社区对连续吹笛子NIGRUM L.单一栽培的不同反应

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Soil microorganisms have important influences on plant growth and health. In this study, four black pepper fields consecutively monocultured for 12, 18, 28 and 38 years were selected for investigating the effect of planting age on rhizosphere and non-rhizosphere soil microbial communities and soil physicochemical properties. The results revealed that the relative abundance of the dominant bacterial phyla in rhizosphere soil increased considerably with long-term consecutive monoculture but decreased in non-rhizosphere soil with a significant decline in Firmicutes. For fungi, an increasing trend over time was observed in both rhizosphere and non-rhizosphere soils, with the abundance of the pathogenic fungi Fusarium increasing significantly accompanied by a decrease in the bacteria Pseudomonas and Bacillus that is beneficial for black pepper. Consecutive monoculture, especially for 38 years, considerably decreased soil microbial diversity. Additionally, the rhizosphere soil pH and organic matter and available K contents decreased with increasing planting duration, though available N and P increased. All soil nutrient contents and microbial diversity indices were higher in rhizosphere soil compared to non-rhizosphere soil. The results suggest that long-term consecutive monoculture leads to variations in soil microbial community composition and physicochemical properties in both rhizosphere and non-rhizosphere soils, thus inhibiting the black pepper growth.
机译：土壤微生物对植物生长和健康有重要影响。在这项研究中，选择了四个黑胡椒领域12,18,28和38岁，用于调查种植年龄对根际和非根际土壤微生物社区和土壤物理化学性质的影响。结果表明，无根际土壤中显性细菌植物的相对丰度随着长期连续的单一栽培而显着增加，但在非根际土壤中减少，迫切性无体。对于真菌，在根际和非根际土壤中观察到随时间的日益趋势，具有致病性真菌镰刀菌的丰度显着伴随着对黑胡椒有益的细菌伪芽孢杆菌和芽孢杆菌的减少。连续的单一栽培，特别是38岁，土壤微生物多样性相当降低。另外，通过增加的种植持续时间，无根际土壤pH和有机物质和可用的K含量随着种植持续时间而降低，但可用N和P增加。与非根际土壤相比，根际土壤土壤营养物质和微生物多样性指数都较高。结果表明，长期连续的单一栽培导致无根际和非根际土壤中土壤微生物群落组成和物理化学性质的变化，从而抑制黑胡椒生长。

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