中国生态农业学报（中英文）2025，Vol.33Issue(3)：520-530,11.DOI:10.12357/cjea.20240476
生物炭对棕壤团聚体稳定性及磷组分分布的影响
Effect of biochar on the stability and distribution of phosphorus fractions of brown soil aggregates
摘要
Abstract
Soil aggregates play an important role in regulating the storage and turnover of phosphorus in the soil.In this study,we evaluated the regulatory effects of biochar-mediated soil aggregates on the form,transformation,and distribution of soil phosphorus.This study was based on long-term field experiments with biochar.Four treatments were selected:no fertilization(CK),biochar ap-plication(BC),NPK fertilizer application(NPK),and NPK fertilizer combined with biochar application(NPK+BC).After the maize harvest in 2021,0-20 cm soil samples were collected to study the effects of biochar on the composition and stability of soil aggreg-ates,as well as the content of various phosphorus fractions in each particle size aggregates.The distribution of phosphorus fractions in the soil aggregates and the relative contribution rates of soil aggregates of different particle sizes to different forms of phosphorus were also clarified.First,the application of biochar significantly increased the proportion of coarse aggregates(>2 mm)by 8.7%com-pared to CK treatment and 15.8%compared to NPK treatment,whereas that of silt and clay particles(<0.053 mm)was reduced by 11.5%compared to CK treatment and 21.8%compared to NPK treatment.The application of biochar significantly increased the mean weight diameter and mean geometric diameter of the soil aggregates by 9.6%and 22.2%,respectively.Second,the application of biochar increased the content of total inorganic phosphorus(mainly manifested as the increase in NaHCO3-Pi and NaOH-Pi contents)in aggregates with particle size>0.25 mm and that of total organic phosphorus(mainly manifested as the increase in NaOH-Po and Residual-P contents)in fine and large aggregates(0.25-2 mm).Third,the application of biochar reduced the relative contribution of silt and clay particles(<0.053 mm)to total phosphorus and different phosphorus fractions and increased that of coarse aggregates(>2 mm)to total phosphorus and different phosphorus fractions.In conclusion,the application of biochar improved the stability and structure of soil aggregates and promoted the distribution of phosphorus fractions in soil aggregates with larger particle sizes.Biochar application is an important agricultural measure for improving soil structure,promoting soil phosphorus retention,and reducing the risk of soil phosphorus loss.关键词
生物炭/土壤团聚体/无机磷/有机磷/相对贡献率Key words
biochar/soil aggregates/inorganic phosphorus/organic phosphorus/relative contribution rate分类
农业科技引用本文复制引用
曹玉凤,佟师师,岳岐,郝丽伟,曹殿云,兰宇,陈温福..生物炭对棕壤团聚体稳定性及磷组分分布的影响[J].中国生态农业学报（中英文）,2025,33(3):520-530,11.基金项目
国家自然科学基金项目(32402691)、沈阳市优秀中青年科技创新人才项目(RC230798)和辽宁百千万人才工程项目(Z20210310)资助 This study was supported by the National Natural Science Foundation of China(32402691),Shenyang Outstanding Young and Middle-aged Scientif-ic and Technological Innovation Talents(RC230798),and Liaoning Millions of Talents Project(Z20210310). （32402691）
