Summer corn fertilization should master "basal fertilizer as the main, supplemented by topdressing; basal manure mainly organic fertilizer, supplemented by chemical fertilizers, phosphorus and potash fertilizer mainly for basal fertilizer, fertilizer applied in different phases; base fertilizer applied adequately, Miaofei early application, pay attention to attack glutinous fertilizer." Etc. N:P:K is preferably 1:0.5 to 0.8:0.5 to 0.8. General basal manure water manure 1500Kg, urea 5Kg, superphosphate 20Kg. The basal fertilizer can be ploughed into the soil after being applied, or a small part of the spreader can be concentrated, or all can be applied or applied. Fertilizers and foliar fertilizers are rarely used. Top dressing is divided into seedling fertilizer, jointing fertilizer, panicle fertilizer and grain fertilizer. After Dingmiao pay close attention to organic fertilizer, 4 to 5 leaf stage combined with Dingmiao Shimiao Miao Fei, generally mu water manure 1500 ~ 2000Kg, urea 10Kg or so; in the effective application of phosphorus and potassium on the soil, can be appropriate to top-dressing part of the phosphorus and potassium fertilizer . In the case of normal growth at the seedling stage, heavy panicle fertilizer is applied. In the case of insufficient fertilizer, the panicle fertilizer is concentrated at one time. The application of topdressing fertilizers during the tasseling process has a significant effect on yield increase. After the tasselling and flowering of the corn, the phosphate fertilizer can be sprayed on the roots. Generally 0.4-0.5% of potassium dihydrogen phosphate solution or 3 to 4% of superphosphate is used to clarify the leachate, and the amount of 75-100 Kg/mu is sprayed on the stem and leaf. On the effect is significant.
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