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。
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/hm^2 while the ratio of 1 ： 1 with maize and wheat season at Zhengzhou and K application amount to 262.5 kg/hm^2 while the ratio of 1：0.75 with maize and wheat season at zhumadian were recommended.
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2009年第1期20-22,共3页
Soil and Fertilizer Sciences in China
基金
瑞士国际钾肥研究所(IPI)资助项目
关键词
小麦
玉米
钾肥
wheat
maize
potash
