植物营养与肥料学报2012，Vol.18Issue(3)：771-776,6.
氮、磷、钾肥与酚对漂洗水稻土硅、铝、铁的活化效应
Activation effects of N, P, K fertilization and phenol on Si, AI, Fe in bleached paddy soil
摘要
Abstract
The activation effects of urea （N）, calcium dihydrogen phosphate （P）, potassium sulfate （K） and catechol （Phy） on Si, A1 and Fe in bleached paddy soil distributed in tea plantation region of west Sichuan Basin were studied by the soil extraction experiment. The results show that the concentration of Si in soil extracted solution is the highest, and the follows are A1 and Fe. The concentrations of Si in soil extracted solution are in the order： NPK ＋ Phy 〉 NPK ≈ P 〉 Phy 〉 K≈CK≥ N, which indicates that the phosphate has the most important impact on Si activation by ligand adsorption of PO34- , HPO4 2- , or H2PO4- , and the phenolic also promotes Si activation through its weak acid role at the same time. The order of A1 concentrations in soil extracted solution is, NPK ＋ Phy 〉 Phy 〉 P≈NPK≈ K ≈ N≥ CK, which indicates that the phenolic plays a prominent role in activation of A1 by formation of soluble complexes with free A1. In addition, K^＋ from potassium fertilizer and Ca^2＋ from phosphorus fertilizer could activate A1 by exchanging a large number of AI^3＋ in strongly acidic tested soils. The Fe concentrations in soil extracted solution are ranked as follows, NPK ＋ Play 〉 Phy 〉 K = P ≈ NPK≈ CK≈ N, indicates that the phenolic plays an important part in Fe activation by complexing and reduction of Fe. K^＋ from potassiumfertilizer and Ca^2＋ from phosphorus fertilizer could activate Fe through exchanging Fe^2＋ adsorbed by soil colloid as well. The urea application has no significant activation effect on soil Si, A1 and Fe. Above all, phosphate, potash and phenolics are important factors in activation of Si, A1 and Fe in bleached paddy soils.关键词
肥料/邻苯二酚/元素/活化作用/漂洗水稻土Key words
fertilizer/catechol/element/activation effect/bleached paddy soil分类
农业科技引用本文复制引用
袁大刚,吴金权,翟鸿凯,吴琴琴,邓晖,许观续,罗芹,吴德勇,王昌全..氮、磷、钾肥与酚对漂洗水稻土硅、铝、铁的活化效应[J].植物营养与肥料学报,2012,18(3):771-776,6.基金项目
国家自然科学基金 （）
四川省科技富民强县重点项目（07NC001-020）资助. （）
