长期施钾对紫色土稻麦产量及土壤钾素的影响  

Effects of long-term K application on rice-wheat yield and soil K in purple soil

作　　者：熊明彪[1] 雷孝章[1] 胡恒[2] 宋光煜[3] 曹叔尤[1] 石孝均[3] 毛知耘[3] 

机构地区：[1]四川大学高速水力国家重点实验室,四川成都610065 [2]四川省水土保持生态环境监测总站,四川成都610041 [3]西南农业大学资源环境学院,重庆400716

出　　处：《西南农业学报》2003年第3期53-56,共4页Southwest China Journal of Agricultural Sciences

摘　　要：在国家紫色土肥力与肥料效益监测基地上,研究了水稻—小麦轮作中,长期施用钾肥对紫色土钾素含量变化及钾肥产量效应的影响。结果表明,长期施钾明显提高稻麦产量,维持紫色土有效钾的平衡;长期秸秆还田并配施化学钾肥是维持紫色土钾库平衡的有效措施。Effects of longterm K application on ricewheat yield and dynamics of soil K content in the rotation of ricewheat were studied in the National Purple Soil Fertility and Fertilizer Efficiency Monitored Base.The results showed that ricewheat yield were increased obviously by longterm K application,the balance of the available K in purple soil was maintained.A joint application of crop straw and chemical K fertilizer is more effective to keep the balance of K in purple soil. 

关 键 词：紫色土 水稻 小麦 轮作 产量 土壤钾素 钾肥 长期定位试验 

分 类 号：S143.3[农业科学—肥料学] S155.25[农业科学—农业基础科学]