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污水污泥的热与化学稳定:对热带土壤中土壤化学特性,微生物功能和玉米产量的影响

William Ramos da Silva¹, Clístenes Williams Araújo do Nascimento¹, Felipe José Cury Fracetto¹

¹Department of Agronomy, Federal Rural University of Pernambuco, Dom Manoel Medeiros Avenue, Pernambuco State, Brazil.

Waste management (New York, N.Y.)

|December 27, 2025

概括

化学稳定 (CS) 污水污泥通过促进微生物活动和营养循环,显著提高了土壤肥力和玉米产量. 热稳定 (TS) 污泥增加了真菌的丰富性,但对整体土壤健康和作物生产率的影响较小.

科学领域:

农业科学农业科学
环境科学环境科学
土壤微生物学土壤微生物学

背景情况:

在农业中对污水污泥的再利用提供了可持续的土壤肥力改善和营养循环.
了解污泥稳定方法的差异性影响对于优化生物固体回收至关重要.

研究的目的:

评估热稳定 (TS) 和化学稳定 (CS) 污水污泥对土壤化学和微生物特性的影响.
评估污泥对玉米 (Zea mays L.) 增长和谷物产量的影响.
确定污泥处理对土壤微生物生物质,酶活动和功能基因丰度的影响.

主要方法:

在玉米种植土壤中以不同的速度 (0-40 Mg ha-1) 应用TS和CS污水污泥.
分析土壤的化学特性:总有机碳,,酸盐和.
微生物属性的评估:微生物生物质C,N,P,酶活动 (尿酶,性酸酶) 和基因丰度 (16S rRNA,18S rRNA,nifH,phoD,amo-AOB).

主要成果:

CS应用显著增加了土壤有机碳 (高达60%) 和 (高达50%),酸盐和含量增加.
与TS相比,CS处理增强了酶活性和微生物使用效率,导致玉米谷物产量比TS高40%.
TS的应用导致真菌丰富度增加117%,微生物生物质C增加,但与CS相比,尿素酶和性酸酶活动较低.
与TS相比,CS增加了25%的phoD基因丰度和32%的amo-AOB,这表明营养循环得到改善,土壤系统更加平衡.

结论:

化学稳定污水污泥是改善土壤化学和微生物特性,增强营养循环和提高热带条件下玉米生产力的优质补充剂.
通过CS应用进行生物固体回收,支持农业强化,同时遵守环境管理和循环经济原则.
该研究强调了污泥稳定方法在确定生物固体再利用对可持续农业的有效性方面的重要性.

关键词:

微生物的功能基因.营养素循环的循环.有机废物再利用有机废物再利用土壤酶活性土壤酶活性

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