土壤学报2012，Vol.49Issue(3)：552-559,8.
红壤基质组分对磷吸持指数的影响
EFFECT OF SOIL MATRIX COMPONENTS ON PHOSPHATE SORPTION INDEX IN RED SOIL
摘要
Abstract
Soil samples were collected form the 7 treatments (NPK, NP, NK, PK, CK, CK + BM, and CK + SR) of a long-term upland fertilization field experiment, which started in 1988, for determination of phosphate sorption index (PSI) with soil maximum P sorption capacity (Xm) , and hence discussions on effects of the soil matrix component, like soil pH, organic matter (OM) , clay, iron-aluminum oxides and inorganic phosphates on PSI. Results show that long-term application of phosphorus fertilizer or combined application of organic and chemical fertilizer could significantly reduce PSI. With rising soil pH and organic matter and iron phosphate (Fe-P) content, PSI decreased markedly. But the higher the contents of free iron-aluminum oxides and clay in the red soil, the higher the soil PSI. Soil phosphate sorption index (PSI) showed a significant linear correlation with soil maximum P sorption capacity (Xm), (Xm =0.5PSI + 412.8, r = 0.967" , p<0.01). Therefore, the former could used to replace soil maximum P sorption capacity (Xm) to characterize soil phosphorus sorption capacity and soil phosphorus supply capacity as well.关键词
红壤/磷吸持指数/有机质/pH/铁铝氧化物/磷酸盐组成Key words
Red soil/ Phosphate sorption index ( PSI)/ Organic matter/ pH/ Iron-Aluminum oxides/Inorganic phosphate分类
农业科技引用本文复制引用
王艳玲,章永辉,何园球..红壤基质组分对磷吸持指数的影响[J].土壤学报,2012,49(3):552-559,8.基金项目
国家自然科学基金项目(No.40901146)、江苏省高校自然科学研究项目(No.10KJB210003)、江苏省高技"青蓝工程"资助及江苏高校优势学科建设工程项目资助 （No.40901146）
