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首页> 美国卫生研究院文献>Scientific Reports >Humic Acid Fertilizer Improved Soil Properties and Soil Microbial Diversity of Continuous Cropping Peanut: A Three-Year Experiment
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Humic Acid Fertilizer Improved Soil Properties and Soil Microbial Diversity of Continuous Cropping Peanut: A Three-Year Experiment

机译：腐植酸肥料改良连作花生的土壤特性和微生物多样性：三年试验

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Although humic acid has been demonstrated to improve the quality of some soil types, the long-term effects of humic acid on soil under continuous cropping peanut are not fully understood. This study aimed to investigate the continuous effects of humic acid on the physicochemical properties, microbial diversity, and enzyme activities of soil under continuous cropping peanut. In this study, a three-year consecutive experiment of cropping peanut was conducted in the North China Plain. In addition to the equal nitrogen, phosphorus, and potassium inputs, humic acid treatment was applied with inorganic fertilizers. Compared with control experiments, humic acid increased the yield and quality of continuous cropping peanut. To elucidate the mechanism of humic acid affecting the soil quality, various soil quality indicators were evaluated and compared in this study. It was found that humic acid increased soil nutrient contents, including the total soil nitrogen, total phosphorus, total potassium, available nitrogen, available phosphorus, available potassium, and organic matter contents, which exhibited the maximum effect in the third year. Meanwhile, the urease, sucrase, and phosphatase activities in the soil significantly increased after treated with humic acid, of which the maturity period increased most significantly. The same results were observed for three consecutive years. Microbial diversity varied considerably according to the high throughput sequencing analysis. Specifically, the number of bacteria decreased while that of fungi increased after humic acid treatment. The abundance of Firmicutes in bacteria, Basidiomycota, and Mortierellomycota in fungi all increased, which have been reported as being beneficial to plant growth. In contrast, the abundance of Ascomycota in fungi was reduced, and most of the related genera identified are pathogenic to plants. In conclusion, humic acid improved the yield and quality of continuous cropping peanut because of improved physicochemical properties, enzymatic activities, and microbial diversity of soil, which is beneficial for alleviating the obstacles of continuous cropping peanut.
机译：尽管已证明腐殖酸可以改善某些土壤类型的质量，但对连续种植花生下腐殖酸对土壤的长期影响尚未完全了解。本研究旨在研究腐殖酸对连作花生土壤理化特性，微生物多样性和酶活性的持续影响。在这项研究中，在华北平原进行了连续三年的花生种植试验。除了相等的氮，磷和钾输入量外，还使用无机肥料进行腐殖酸处理。与对照实验相比，腐殖酸提高了连作花生的产量和品质。为了阐明腐殖酸影响土壤质量的机制，本研究对各种土壤质量指标进行了评估和比较。发现腐殖酸增加了土壤养分含量，包括土壤总氮，总磷，总钾，有效氮，有效磷，有效钾和有机质含量，在第三年发挥了最大的作用。同时，腐殖酸处理后土壤中的脲酶，蔗糖酶和磷酸酶活性显着增加，其中成熟期显着增加。连续三年观察到相同的结果。根据高通量测序分析，微生物多样性差异很大。具体而言，腐殖酸处理后细菌数量减少而真菌数量增加。细菌中的菌丝，细菌中的担子菌和菌丝的丰度都增加了，据报道对植物的生长是有益的。相反，真菌中子囊菌的丰度降低了，并且鉴定出的大多数相关属对植物都是致病的。综上所述，由于腐殖酸的理化特性，酶活性和土壤微生物多样性的改善，提高了连作花生的产量和品质，有利于减轻连作花生的障碍。

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