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对亚种间杂交稻“F1 3 1S/G3 7”进行了 2种施钾量和 3种施钾法试验 ,结果表明 :施钾能明显提高其产量 ,且施钾量越多增产幅度越大。不同施钾法处理中 ,以 60 %分蘖肥加 40 %穗肥处理的增产效果最好 ,1 0 0 %作分蘖肥处理和 60 %分蘖肥加 40 %粒肥处理的增产效果相近。施钾增产的主要原因是库容量扩大 ,抽穗期叶面积系数增加 ,干物质生产量增多。讨论了不同时期施钾的作用和施钾技术
Two kinds of K application and three K application methods were carried out on the hybrid F1 “F1 3 1S / G3 7”. The results showed that applying K could obviously increase the yield, and the more the K application, the more yield increase . The results showed that the yield increase was best when 60% tillering fertilizer plus 40% spike fertilizer was applied in different treatments of potassium fertilization. The yield increase effect of 100% tillering treatment and 60% tillering fertilizer plus 40% grain fertilizer treatment were similar. The main reason for increasing potassium production is the expansion of storage capacity, the increase of leaf area index at heading stage and the increase of dry matter production. The effects of potassium application and potassium application in different periods were discussed