生态学杂志2026，Vol.45Issue(2)：554-561,8.DOI:10.13292/j.1000-4890.202602.008
化肥有机替代对土壤磷有效性和水稻产量的影响
Effects of organic substitution of chemical fertilizers on soil phosphorus availability and rice yield
摘要
Abstract
To explore the effects of straw return,either alone or in combination with animal manure,and of repla-cing part of the chemical nitrogen(N)fertilizer on paddy soil phosphorus(P)availability and rice yield,we con-ducted a field experiment with four treatments in a hilly paddy field of central Sichuan.The treatments included un-fertilized control(CK),chemical N,P,and potassium(K)fertilizer(NPK),pig manure in combination with straw return and replacing part of chemical N fertilizer(MSNPK),and straw return alone and replacing part of chemical N fertilizer(SNPK).The results showed that the SNPK treatment significantly increased labile organic P(NaHCO3-Po)and moderately labile organic P(NaOH Ⅰ-Po)contents,and decreased labile inorganic P(NaH-CO3-Pi)and highly stable organic P(NaOH Ⅰ-Po)contents compared to NPK treatment.The MSNPK treatment led to a significant increase in water-soluble P(NH4Cl-Pi)and moderately labile inorganic P(NaOH Ⅰ-Pi)con-tents,and a significant decrease in NaOH Ⅰ-Po and NaOH Ⅰ-Po contents compared to NPK and SNPK treat-ments.Moreover,the SNPK treatment significantly increased soil organic carbon(SOC)content,alkaline phospha-tase activity,rice P uptake,yield and aboveground biomass compared to NPK and MSNPK treatments.Results of correlation analysis revealed that SOC,alkaline phosphatase,and P uptake were significantly positively correlated with rice yield and aboveground biomass.In addition,NH4Cl-Pi and NaHCO3-Po showed significantly positive cor-relation with rice P uptake,yield and aboveground biomass.Results of partial least squares path modeling(PLS-PM)further indicated that NaHCO3-Po could directly affect NH4Cl-Pi or indirectly affect NH4Cl-Pi by influencing NaHCO3-Pi under the catalytic hydrolysis of alkaline phosphatase.Overall,the straw return along and replacing part of chemical N fertilizer can enhance the activity of soil alkaline phosphatase and its mediated organic P fraction mineralization process.This approach can increase the paddy soil P availability and rice P uptake,yield,and aboveground biomass,thus can be used as a suitable fertilizer application method for the hilly paddy fields of cen-tral Sichuan.关键词
磷酸酶/土壤磷组分/秸秆还田/水田/吸磷量Key words
phosphatase/soil phosphorus fraction/straw return/paddy field/phosphorus uptake引用本文复制引用
王艳玲,王吉高,魏锴,袁朝燕,严金龙,朱波..化肥有机替代对土壤磷有效性和水稻产量的影响[J].生态学杂志,2026,45(2):554-561,8.基金项目
四川省科技创新苗子工程培育项目(MZGC20240117)、四川省自然科学基金面上项目(2025ZNSFSC0295)和中国科学院青年创新促进会项目(2021374)资助. （MZGC20240117）
