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The continuous application of biochar in field: effects on P fraction, P sorption and release

文献类型： 外文期刊

作者： Wang, Qiujun 1 ; Xu, Liping 3 ; Guo, Dejie 1 ; Wang, Guangfei 1 ; Song, Xiuchao 1 ; Ma, Yan 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Resource & Environm, Nanjing 210014, Peoples R China

2.Jiangsu Univ, Sch Environm & Safety Engn, Zhenjiang 212013, Jiangsu, Peoples R China

3.Liuhe Agr Technol Extens Ctr, Cultivated Land Qual Protect Stn, Nanjing 211500, Peoples R China

关键词： Biochar; P fractionation; P adsorption; P release

期刊名称：CHEMOSPHERE （ 影响因子：7.086； 五年影响因子：6.956 ）

ISSN： 0045-6535

年卷期： 2021 年 263 卷

页码：

收录情况： SCI

摘要： It is unclear how biochar can affect P availability in soil, especially in field under continuous application. In this study, a field experiment was conducted to study the effect of 2-years application of biochar on P availability, P fractionation, P sorption and release in a clay soil. The biochar in this study was produced from rice straw through pyrolysis at 700 degrees C. As compared with no fertilizer treatment (CK) and chemical fertilizer treatment (CF), the biochar application with chemical fertilizer treatment (BCF) significantly increased total P and available P content in soil. And BCF treatment significantly increased resin P, NaHCO3-extracted P, Fe/Al-Po and HCl-extracted P but decreased Fe/Al-Pi and residual P as compared with CF treatment. Surprisingly, BCF treatment showed higher sorption capacity and release capacity of soil P than that of CF treatment. These results imply that continuous application of biochar for 2-years in field may adsorbed P through physical sorption rather than chemical reaction and then improve P availability in soil. (C) 2020 Elsevier Ltd. All rights reserved.

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