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Dissolve organic matter of mature chicken compost contributes to the protection of microorganisms from the stress of heavy metals

文献类型： 外文期刊

作者： Yang, Wei 1 ; Zhu, Yuanchen 2 ; Jiang, Yue 1 ; Zhang, Jiaqi 1 ; Wang, Wei 1 ; Jin, Yu 1 ; Liu, Xuesheng 1 ; Qu, Juanjuan 1 ;

作者机构： 1.Northeast Agr Univ, Sch Resources & Environm, Harbin 150030, Peoples R China

2.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Harbin 150081, Peoples R China

3.Heilongjiang Acad Agr Sci, Harbin 150030, Peoples R China

关键词： Manure compost; DOM; Microbial community; Heavy metal; Black soil

期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：7.4； 五年影响因子：7.3 ）

ISSN： 2213-2929

年卷期： 2024 年 12 卷 5 期

页码：

收录情况： SCI

摘要： Dissolved organic matter (DOM), as the most active component of manure and compost, can influence heavy metal forms and microbial community structure by changing the physicochemical properties of soils. This study employed DOM extracted from fresh chicken manure (FDOM) and mature compost (MDOM) and evaluated their impacts on the physicochemical properties, heavy metal forms, and microbial communities of chernozem and dark brown soil through UV-Vis, EEM-PARAFAC, and high-throughput sequencing. The results showed that all DOM treatments decreased soil pH except for the MDOM at 150 mg C/kg applied to chernozem (CLM). MDOM treatments were more favorable in increasing soil available phosphorus content and the degree of humification of soil DOM, and FDOM treatments were more favorable in increasing soil dissolved organic carbon content and decreasing the degree of humification of soil DOM. Except for CLM treatment, the other DOM treatments decreased the content of stable state Pb, increased the risk of Pb migration and biotoxicity, and FDOM treatments were more pronounced. In addition, DOM treatments decreased the Shannon diversity of two soils and the Chao1 index in chernozem. However, DOM at 300 mg C/kg could increase the abundance of soil eutrophic and heavy metals tolerant dominant phyla (Proteobacteria and Bacteroidota) as well as dominant genera ( Sphingomonas , Lysobacter, , and Arthrobacter). ). This study provides a comprehensive understanding of the risk of manure and compost application in heavy metals-polluted soils and its interaction with microorganisms.

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