Soil organic carbon stability mediate soil phosphorus in greenhouse vegetable soil by shifting phoD-harboring bacterial communities and keystone taxa

文献类型： 外文期刊

第一作者： Chen, Shuo

作者： Chen, Shuo;Zhang, Shuai;Wei, Lulu;Li, Ji;Chen, Qing;Zhang, Tao;Wang, Liying;Li, Naihui;Wei, Xiaomeng;Wei, Yuquan;Li, Ji;Huang, Shaowen;Bolan, Nanthi S.;Bolan, Nanthi S.

作者机构：

关键词： Soil phosphorus; Soil organic carbon; Greenhouse soil; Manure; Straw; phoD gene community

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：9.8； 五年影响因子：9.6 ）

ISSN： 0048-9697

年卷期： 2023 年 873 卷

页码：

收录情况： SCI

摘要： Addition of organic amendments, such as manure and straw, to arable fields as a partial substitute for mineral phospho-rus (P), are a sustainable practice in high-efficiency agricultural production. Different organic inputs may induce var-ied soil organic carbon (OC) stability and phoD harboring microbes, subsequently regulate P behavior, but the underlying mechanisms are poorly understood. A 11-year field experiment examined P forms by 31P-nuclear magnetic resonance (NMR), OC chemical composition by 13C NMR, and biologically-based P availability methods, phoD bacte-rial communities, and their co-occurrence in soils amended with chemical P fertilizer (CF), chemical P partly substituted by organic amendments including pig manure (CM), a mixture of pig manure and corn straw (CMS), and corn straw (CS), with equal P input in all treatments. Organic amendments significantly increased soil labile Pi (CaCl2-P, citrate-P, 2.91-3.26 and 1.16-1.32 times higher than CF) and Po (enzyme-P, diesters, 4.08-7.47 and 1.71-2.14 times higher than CF) contents and phosphatase activities, while significantly decreased aromaticity (AI) and recalcitrance indexes (RI) of soil C, compared with CF. The keystone genera in manured soils (Alienimomas and Streptomyces) and straw-applied soils (Janthinobacterium and Caulobacter) were significantly correlated with soil enzyme-P, microbial biomass P (MBP), diesters, and citrate-P. Soil AI and RI were significantly correlated with the phoD keystone and soil P species. It suggested that the keystone was impacted by soil OC stability and play a role in regulating P redistribution in amended soils. This study highlights how manure and straw incorporation altered soil OC stability, shaped the phoD harboring community, and enhanced soil P biological processes promoted by the keystone taxa. The partial substitution of mineral P by mixture of manure and straw is effectively promote soil P avail-ability and beneficial for environmental sustainability.

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