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以南方双季稻田改种春玉米杂交晚稻这一新型水旱轮作制为研究对象 ,研究了稻田春玉米不同施肥水平、不同追肥次数及不同追肥时间的效果。结果表明 :稻田春玉米最佳施氮量为 30 0 kg/ hm2 左右 ,以二次肥 (即基肥和穗肥各占一半 )较为省工。穗肥以 9— 10叶全展时施用增产效果较好。
The new paddy crop rotation system with spring maize hybrid rice was used as the research object in this study. The effect of different fertilization levels, different top dressing times and different top dressing time on paddy field spring maize was studied. The results showed that the optimum nitrogen application rate was about 30 0 kg / hm2 for spring maize in paddy field, and the secondary manure (ie half of basal fertilizer and panicle spike) was more efficient. Spike fertilizer with 9-10 leaves when the whole exhibition is better yield increase.