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首页> 美国卫生研究院文献>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群落对连绵Piper nigrum L.单种养殖的不同反应

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摘要

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。在本研究中，选择了连续种植12年，18年，28年和38年的四个黑胡椒田，以研究种植年龄对根际和非根际土壤微生物群落以及土壤理化特性的影响。结果表明，长期连续单培养，根际土壤中优势菌门的相对丰度显着增加，但在非根际土壤中，优势菌的相对丰度下降。对于真菌，在根际和非根际土壤中均观察到随时间的增长趋势，致病性真菌镰刀菌的丰度显着增加，同时对黑胡椒有益的假单胞菌和芽孢杆菌减少。连续的单作，特别是连续38年，大大降低了土壤微生物的多样性。此外，根际土壤的pH和有机质以及有效钾含量随着播种时间的延长而降低，尽管有效氮和磷增加。与非根际土壤相比，根际土壤的所有土壤养分含量和微生物多样性指数均较高。结果表明，长期连续单培养导致根际和非根际土壤微生物群落组成和理化性质的变化，从而抑制了黑胡椒的生长。

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