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(1)实践证明 ,对中低产田块增加施肥量 ,可以显著地提高产量。对高产田块则保持一般施肥水平即可。以水稻为例 ,在高肥力的土壤上 ,每 6 6 7ｍ2 追施 12ｋｇ ;在中等肥力的土壤上每 6 6 7ｍ2 追施16ｋｇ ;在低产的土壤上 ,则应追施 2 0ｋｇ。(2 )尽量做到在作物的营养盛期追肥
(1) Practice has proved that increasing the amount of fertilizer applied to low and medium-yield plots can significantly increase the yield. On the high yield plots to maintain the level of general fertilization can be. In rice, for example, topdressing 12 kg per 6 6 7 m 2 in high-fertility soils and up to 16 kg per 6 6 7 m 2 in moderately fertile soils and 20 kg in low-yielding soils. (2) As far as possible in the crop nutrient peak dressing