Effects of acidic phosphorus-rich biochar from halophyte species on P availability and fractions in alkaline soils

Chemical and Biological Technologies in Agriculture

Research

Mo Chen¹  Maidinuer Abulaizi¹  Xuyang Wang²  Guangling Yu²  Hongtao Jia²  Guangmu Tang³  Haigang Ma³  Tao Sun⁴ 

[1] College of Grassland Science, Xinjiang Agricultural University, 830052, Urumqi, China;College of Resources and Environment Sciences, Xinjiang Agricultural University, East Nongda Road No. 311, 830052, Urumqi, China;Institute of Soil and Fertilizer & Agricultural Sparing Water, Xinjiang Academy of Agricultural Science, 830091, Urumqi, China;Key Laboratory of Original Environmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs/Tianjin Key Laboratory of Agro-Environment and Agro-Products, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, 300191, Tianjin, China;

关键词: Alkaline soil;    Biochar;    Halophytes;    Phosphorus;    Modification;   

DOI  :  10.1186/s40538-022-00374-4

 received in 2022-10-06, accepted in 2022-12-14,  发布年份 2022

来源: Springer

【 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·kg− 1 and 5.24 g·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.Graphical Abstract

【 授权许可】

CC BY   
© The Author(s) 2022

【 图 表 】

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