文献类型： 外文期刊
第一作者： Wang, Qiujun
作者： Wang, Qiujun;Guo, Dejie;Wang, Guangfei;Song, Xiuchao;Ma, Yan;Ma, Yan;Xu, Liping
作者机构：
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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