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| Research on the activation and regulation of soil phosphorus by organic acids |
| Received:November 17, 2021 |
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| KeyWord:organic acid;soil phosphorus;phosphorus activation;phosphorus form;inorganic phosphorus;activation mechanism |
| Author Name | Affiliation | E-mail | | WEI Dan | College of Resources and Environment, Northeast Agriculture University, Harbin 150030, China
Institute of Plant Nutrition and Resources and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China | | | YANG Huawei | College of Resources and Environment, Northeast Agriculture University, Harbin 150030, China | | | CHEN Yanhua | Institute of Plant Nutrition and Resources and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China | yhchen55@126.com | | Lü Chunling | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | BI Ruixin | College of Resources and Environment, Northeast Agriculture University, Harbin 150030, China | | | ZHANG Xinyuan | College of Resources and Environment, Northeast Agriculture University, Harbin 150030, China | | | MA Maoting | Institute of Plant Nutrition and Resources and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China | |
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| Abstract: |
| In recent years, soil available phosphorus content of farmland soil in China has increased, aggravating the risk of water pollution and phosphate rock depletion. Therefore, rational utilization of accumulated phosphorus in soil is very important for sustainable development of agricultural production and ecological environment protection. In this paper, VOSviewer keyword co-occurrence analysis and statistical analysis were used to analyze the literature on soil phosphorus activation, including the types of organic acids, research overview of organic acid-activated phosphorus, including results, influencing factors, and activation mechanisms of organic acid-activated phosphorus. The analysis found that research on organic acid-activated phosphorus was still a hot topic in the world. Organic acid can remarkably improve available phosphorus content of the soil by promoting the conversion of high-stability phosphorus to active phosphorus by 10~1 000 times. The activation effect of organic acid is affected by its type, concentration, and soil type. Citric acid and oxalic acid had the most significant activation effects among the organic acids analyzed, and activated phosphorus content increased with increasing organic acid concentration. Oxalic acid had the strongest activation effect in calcareous and neutral soils, while citric acid had the strongest activation effect in acidic soil. The activation mechanisms mainly included acid dissolution, complexation, and competitive adsorption, and the synergistic effect of these three mechanisms promoted the activation of phosphorus. Based on these results, the paper summarized the study of activation of soil phosphorus by organic acid, which will help provide important theoretical basis and practical methods for efficient utilization of soil phosphorus resources and water environment protection. |
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