数字农科院2.0

Application of organic and inorganic acids in activating soil phosphorus in agriculture

文献类型： 外文期刊

作者： Tong Luo;Huiping Gui;Nianchang Pang;Kai Peng;Qianqian Wang;Xiangru Wang;Xiling Zhang;Xiaoyan Ma

作者机构：

关键词： Metagenomics sequencing;Microecology;Organic acid;Phosphorus activation;Phosphorus classification

期刊名称： Applied Soil Ecology

ISSN： 0929-1393

年卷期： 2026 年 219 卷

页码：

收录情况： SCIE（2025版）

摘要： Phosphorus is strongly fixed in calcareous soils, resulting in low utilization efficiency in agricultural production. However, it remains unclear how organic and inorganic acids can help activate soil phosphorus while maintaining soil microecological structure and function. This study investigated the effects of combining sulfuric acid (inorganic) and oxalic acid (organic) on the transformation of soil phosphorus forms, microbial structure, and microbial function. The results revealed that the addition of organic and inorganic acids to calcareous soil reduced soil pH by 1.95%–2%, substantially increased the activities of alkaline phosphatase and phytase involved in phosphorus cycling, and increased the contents of highly and intermediately active phosphorus by 18%–189%. Furthermore, 31P nuclear magnetic resonance (NMR) analysis revealed that organic and inorganic acids promoted the decomposition of organic phosphorus. Macrogenomic analysis indicated that appropriate addition of oxalic acid could restore the reduction in microbial diversity caused by adding sulfuric acid, thereby improving its uniformity. The abundance of microbial functional genes indicated that carbon fixation as well as nitrogen and phosphorus cycling in soil were enhanced. Community assembly analysis further showed that assembly was dominated by deterministic processes. Thus, the addition of moderate amounts of organic and inorganic acids can substantially improve phosphorus availability in calcareous soils, promote soil biochemical cycling, and ultimately provide new approaches for efficiently utilizing soil phosphorus resources while supporting the development of a healthy soil microecology.

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