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Composting with biochar or woody peat addition reduces phosphorus bioavailability

文献类型： 外文期刊

作者： Wei, Yuquan 1 ; Wang, Jue 1 ; Chang, Ruixue 1 ; Zhan, Yabin 1 ; Wei, Dan 3 ; Zhang, Lei 1 ; Chen, Qing 1 ;

作者机构： 1.China Agr Univ, Coll Resource & Environm Sci, Beijing Key Lab Farmland Soil Pollut Prevent & Re, Beijing 100193, Peoples R China

2.China Agr Univ, Organ Recycling Inst Suzhou, Suzhou 215128, Peoples R China

3.Beijing Acad Agr & Forestry Sci, Inst Plant Nutr & Resources, Beijing 100097, Peoples R China

关键词： Composting; Charcoal-based material; Phosphorus availability; Sequential extraction; XANES

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）

ISSN： 0048-9697

年卷期： 2021 年 764 卷

页码：

收录情况： SCI

摘要： Biochar and woody peat have been recognized as an additive to reduce carbon and nitrogen loss during composting. Yet little is known about their influences on the transformation of phosphorus (P) fractions in composting. This study investigated the quantitative and qualitative changes in different P forms during composting with adding biochar or woody peat using sequential extraction and P K-edge X-ray absorption near-edge structure (XANES). The results showed that compost products from the treatment with adding woody peat had a higher HA/FA (the ratio of humic acid to fulvic acid) compared to biochar treatment and the control, suggesting that the addition of woody peat might benefit the humification process of composting. Sequential extraction and XANES illustrated that adding biochar or woody peat limited the P availability. Biochar increased the proportion of Pi and woody peat decreased the conversion from Po to Pi compared to the control. Structural equation modeling and redundancy analysis suggested that biochar improved the refractory P based on the indirect effects of NH4+-N by regulating microbial community, while woody peat was beneficial for Po accumulation by affecting humic acid. Taken together, this research provides basis for regulating the nutrient level of carbon, nitrogen, and phosphorus in composts and reducing environmental risks. (C) 2020 Elsevier B.V. All rights reserved.

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