Manure derived hydrochar reduced phosphorus loss risk via an alteration of phosphorus fractions and diversified microbial community in rice paddy soil

文献类型： 外文期刊

第一作者： Ding, Shudong

作者： Ding, Shudong;Li, Jing;He, Shiying;Xie, Huifang;Fu, Haibin;Feng, Yanfang;Xue, Lihong;Wang, Yu;Xie, Huifang;Fu, Haibin;Shaheen, Sabry M.;Rinklebe, Joerg;Shaheen, Sabry M.;Shaheen, Sabry M.

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关键词： Hydrothermal carbonization; P speciation in paddy soils; 31P liquid NMR; Microbial community; Network diagram analysis

期刊名称：CONSTRUCTION AND BUILDING MATERIALS （ 影响因子：7.4； 五年影响因子：7.9 ）

ISSN： 0950-0618

年卷期： 2024 年 918 卷

页码：

收录情况： SCI

摘要： Phosphorus (P) loss caused by the irrational use of manure organic fertilizer has become a worldwide envi-ronmental problem, which has caused a potential threat to water safety and intensified agricultural non-point source pollution. Hydrothermal carbonization is method with a low-energy consumption and high efficiency to deal with environmental problems. Application of pig manure-derived hydrochar (PMH) to soil exhibited potential of sustainable development compared with the pristine pig manure (PM). However, the effects of PMH on the distribution of P among the fractions/forms and the interaction between microorganisms and P forms and its relevance to the potential loss of P in paddy fields has not been clarified. Therefore, in this study, a soil column experiment was conducted using the untreated soil (control), and the PM, PMH1 (PMH derived at 180 degrees C), and PMH2 (PMH derived at 260 degrees C) treated soils (at the dose of 0.05 %) and rice was cultivated to investigate the effects of PM and PMH on the P fractions, mobilization, ad potential loss via the induced changes on soil mi-crobial community after a complete growing season of rice. The trend of P utilization was evaluated by P speciation via continuous extraction and 31P NMR. The addition of PMH reduced the proportion of residual P in soil by 23.8-26.3 %, and increased the proportion of HCl-P and orthophosphate by 116.2-158.6 % and 6.1-6.8 % compared to PM. The abundance of gcd gene developed after the application of PMH2, which enhanced the mobile forms of soil P utilization via secreting gluconic acid. The network diagram analysis concluded that the changes in various P forms were mainly related to Proteobacteria, Bacteroides, Firmicutes and Acidobacteria. The results illustrated that PMH mitigate the potential risk of P loss more than PM by altering P fractions and affecting soil microbial community.

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