Effects of acidic phosphorus-rich biochar from halophyte species on P availability and fractions in alkaline soils
文献类型： 外文期刊
第一作者： Wang, Xuyang
作者： Wang, Xuyang;Yu, Guangling;Jia, Hongtao;Sun, Tao;Ma, Haigang;Tang, Guangmu;Chen, Mo;Abulaizi, Maidinuer
作者机构：
关键词： Alkaline soil; Biochar; Halophytes; Phosphorus; Modification
期刊名称：CHEMICAL AND BIOLOGICAL TECHNOLOGIES IN AGRICULTURE （ 影响因子：6.6； 五年影响因子：6.6 ）
ISSN：
年卷期： 2022 年 9 卷 1 期
页码：
收录情况： SCI
摘要： Conditioning alkaline soil with acidic phosphorus-rich biochar might contribute to improving soil phosphorous (P) availability and waste utilization efficiency. In this study, acidic phosphorus-rich biochar was prepared using halophyte biochar (HBC) modified by H3PO4 (P-HBC) and H4P2O7 (PA-HBC). The P-containing groups and P fractions in the HBCs were characterized, and the effects of biochar on the P fractions in alkaline soil were examined with incubation experiments. The results showed that the pH of P-HBC (3.31) and PA-HBC (2.17) was significantly reduced compared with HBC, and the total P contents rose to 4.66 g & BULL;kg(- 1) and 5.24 g & BULL;kg(- 1), respectively. The spectral characterization confirmed the loading of P-containing and acidic functional groups in the HBCs after modification. The application of P-HBC and PA-HBC in alkaline soils decreased the soil pH and facilitated the transformation of stable P into active fractions. Overall, acidic phosphorus-rich biochar can be employed to increase P activity in alkaline soil.
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