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优质稻田间穗肥试验表明,在叶色转赤的基础上,施穗肥一般以复合肥112.5~150.0 kg/hm2加氯化钾37.5 kg/km2为宜; 施穗肥比不施穗肥增产10.7%~15.5%。施穗肥的效果还与肥料中的氮钾比例有关,N∶K2O以1∶0.7~1.0较适宜。
High-quality paddy field experiments showed that, on the basis of the reddish leaf color, the general application of topdressing fertilizer was 112.5-150.0 kg / hm2 plus 37.5 kg / km2 of potassium chloride; 10.7% ~ 15.5%. The effect of spike fertilizer is also related to the proportion of nitrogen and potassium in the fertilizer, N: K2O to 1: 0.7 to 1.0 is more appropriate.