农业工程学报2011，Vol.27Issue(2)：261-266,6.DOI:10.3969/j.issn.1002-6819.2011.02.044
磷钾肥施用对日光温室土壤溶液离子组成的影响
Effects of application of phosphorus and potassium fertilizers on ion compositions of soil solution in solar greenhouse
摘要
Abstract
An incubation method was used to study the effects of application of phosphorus (P) and potassium (K)fertilizers on the electric conductivity (EC) and ion compositions in soil solution under sunlight greenhouse. The EC and concentrations of K+, Na+, Ca2+, Mg2+, NO3- ions and mole ratios of K+ / Ca2+, K+ / Mg2+ in soil solution of greenhouse without addition of fertilizer were 2.5, 95.0, 16.6, 1.9, 3.2, 4.0, 31.0 and 39.0 times of that in arable soil, respectively,indicating the serious accumulation and imbalances of ions in greenhouse soil. The application of P and K fertilizers had different effects on ion composition of soil solution. Addition of P fertilizer significantly decreased the EC and concentrations of Ca2+, Mg2+ ions both in arable and greenhouse soils, its effect on concentrations of K+, NO3--N and NH4+-N ions in the soils was not significant. As the increasing addition of K fertilizer, the EC and concentrations of K+,Na+, Ca2+, Mg2+ ions and mole ratios of K+/Ca2+, K+/Mg2+ in solutions of arable and greenhouse soils increased. The study indicated that the effects of inadequate application of P and K fertilizer on the over accumulation of salts and cation imbalances deserve further study.关键词
温室/土壤/溶液/电导率/离子组成/离子比例Key words
greenhouses/ soils/ solutions/ electrical conductivity (EC)/ ion compositions/ ion ratios分类
农业科技引用本文复制引用
陈竹君,高佳佳,赵文艳,王春阳,周建斌..磷钾肥施用对日光温室土壤溶液离子组成的影响[J].农业工程学报,2011,27(2):261-266,6.基金项目
陕西现代农业产业技术体系(蔬菜)项目 （蔬菜）
西北农林科技大学拔尖人才支持计划(2006) （2006）
西安市农业科技攻关项目(GG04094) （GG04094）
