Developing more effective phosphorus-loaded iron modified biochar fertilisers for improvement of peanut yield and regulation of soil phosphorus fractions

文献类型： 外文期刊

第一作者： Zhang, Junxiao

作者： Zhang, Junxiao;Zhang, Junxiao;Wu, Qi;Chi, Daocai;Xia, Guimin;Zhang, Junxiao;Arthur, Emmanuel

作者机构：

关键词： Soil phosphorus fractions; Phosphorus fertilizer utilization efficiency; Slow release; Phosphorus transformation

期刊名称：SOIL & TILLAGE RESEARCH （ 影响因子：6.8； 五年影响因子：7.8 ）

ISSN： 0167-1987

年卷期： 2025 年 252 卷

页码：

收录情况： SCI

摘要： Phosphorus-loaded iron-modified biochar (Fe-BP) can be used as farmlands' slow-release phosphorus (P) fertilizer. This study aimed to explore the effects of Fe-BP on soil P composition, phosphatase activity, peanut P accumulation, and P fertilizer utilization efficiency in sandy soil. The two-year experiment was a randomized complete block design including no biochar and no P fertilizer (B0P0), no biochar and conventional phosphate fertilizer (CK) (B0P1, CK, P2O5 is 144 kg & sdot; ha-1), biochar and CK (B1P1), iron-modified biochar (Fe-B) and CK (FeB-P1), P loaded Fe-B and CK (FeBP-P1), P loaded Fe-B and two third CK (FeBP-P2, P2O5 is 96 kg & sdot; ha-1). It was found that Fe-B increased P accumulation, yield and P fertilizer utilization efficiency in peanuts. The physiological efficiency of P (PEP) of FeBP-P1 increased by 14.8 % compared with that of FeB-P1. During the fallow period, FeB-P1 decreased the soil available P content, while FeBP-P1 increased the soil available P content, and this effect lasted into the second year. Fe-B did not increase soil pH and did not significanlty affect acid phosphatase. FeBP-P2 increased NaHCO3-Pi by 66 % and 49 %, respectively, compared to B0P0 and B0P1. This increase is mainly due to the slow release of phosphates carried by FeBP-P2. Overall, Fe-BP enhanced soil available P under reduced P fertilizer application, improving P use efficiency.

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