长期施用含氯化肥对土壤养分和花生产量的影响

Effects of Application of Long-term Chlorine-containing Fertilizers on Peanut Yield and Soil Nutrient

采用微区定位试验的方法,研究了长期施用含氯化肥对土壤养分和花生产量的影响。结果表明：与对照相比,长期施用含氯化肥0~40cm土层的土壤24年累积氯残留率平均为5.86%,土壤中含氯量平均为77.55kg.hm-2,土壤pH值降低幅度为1.7%~16%,土壤有机质增加了1.1%~2.7%,全氮增加了1.1%~2.7%,全磷增加了2.1%~13.0%,全钾增加0.2%~2.5%,碱解氮增加30.5%~92.3%,速效磷增加了100%~203%,速效钾增加了23.6%~46.2%。施用含氯化肥对花生有增加产量的作用,增产幅度为37.60%~92.07%。

Micro-plot experiment was carried out to study the effects of application of chlorine-containing fertilizers on peanut yield and soil in 2009.The results indicated that long-term application of chlorine-containing fertilizers caused chloride accumulation in soil in 24 years.In 0-40cm depth of soil,the cumulative residual rate of chloride was 5.86% in average,with the chloride content of 77.55kg·ha-1.The soil pH value decreased by 17%-16%.The OM increased by 1.1%-2.7%,total nitrogen increased by 1.1%-2.7%,total phosphorum increased by 2.1%-13.0%,total potassium increased by 2.1%-13.0%.And available nutrient in soil also increased definitely.The alkaline hydrolysis increased by 30.5%-92.3%,avail phosphorum increased by 100%-203%,avail potassium was increased 23.6%-46.2%.The application of chlorine-containing fertilizers onhanced peanut yield,with yield increase extent of 37.60%-92.07%.