添加生物炭对土壤磷素有效性影响研究进展

Effects of adding biochar on availability of soil phosphorus:A review

磷固定是土壤磷素生物有效性降低重要因素。生物炭因其独特理化性质,对提高土壤磷素可利用性、降低土壤磷素固定、减少磷肥施用、促进农业可持续发展以及生态环境保护具有重要作用。生物炭作为长效缓释磷资源,可降低土壤对磷吸附,增加微生物数量和酶活性,减少磷淋溶。文章综述在添加生物炭后土壤的pH、微生物、吸附和截留磷作用特征,讨论生物炭对土壤磷素的影响机理,对进一步认识生物炭影响土壤磷素有效途径具有重要意义。

Phosphorus fixation is an important factor in reducing the bioavailability of soil phosphorus.Due to its unique physical and chemical properties,biochar play an important role in improving the availability of soil phosphorus,reducing soil phosphorus fixation,lessening the application of phosphate fertilizer,and promoting sustainable agricultural development and ecological environmental protection.As a long-lasting slow-release phosphorus resource,biochar can reduce the adsorption of phosphorus in the soil,increase the number of microorganisms and enzyme activity,and reduce phosphorus leaching.This article summarized the characteristics of soil pH,microorganisms,adsorption and retention of phosphorus after adding biochar to the soil,and discussed the mechanism of biochar's influence on soil phosphorus,which was important for further understanding of the effective ways that biochar affected soil phosphorus significance.