【摘要】 研究了河南省郑州潮土区和驻马店砂姜黑土区玉米、小麦周年轮作制下施钾效应及土壤钾素的变化。结果表明,在土壤速效钾含量中等的砂姜黑土和潮土上玉米、小麦施用钾肥增产效果显著;郑州点玉米、小麦季和驻马店点玉米季随着钾肥用量的增加,玉米、小麦产量和产值逐渐增加,驻马店点小麦季产量和产值以NPK2处理最高,两点钾素的盈余都随钾肥用量的增加而呈上升趋势。从钾肥产投比、利用率和单位钾素增产量综合考虑,建议郑州潮土区玉米、小麦轮作年施钾量(K2O)为300 kg/hm2,玉米、小麦季分配比以1∶1为宜;建议驻马店砂姜黑土区年施钾量(K2O)为262.5 kg/hm2,玉米、小麦季分配比以1∶0.75为宜。更多还原

【Abstract】 The effect of K application and change of K in soil in wheat-maize rotation system of fluvio-aquic soil in Zhengzhou,Henan and lime concretion black soil in Zhumadian were studied.The result showed that the increase production of wheat and maize was remarkable at middle-level available K in lime concretion black soil and fluvio-aquic soil.The yield and value of wheat and maize increased as the K input amount increased in maize and wheat season of Zhengzhou and in maize season of Zhumadian.The yield and value of wheat in NPK2 were highest at Zhumadian.The surplus of K amount increased as the K input amount increased at the 2 locations.According to the ratio of output/input,use efficiency and increased yield of 1kg K fertilizer,the K application amount to 300 kg/hm2 while the ratio of 1∶1 with maize and wheat season at Zhengzhou and K application amount to 262.5 kg/hm2 while the ratio of 1∶0.75 with maize and wheat season at zhumadian were recommended.更多还原