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选择中等肥力的黄壤土种植春玉米100亩,品种为中单二号,用40亩割青作试验,60亩不割青作对照。播前每亩施牛粪710公斤。翻种时施窝肥50公斤,猪肥750公斤。每亩保苗3500株。第一次中耕每亩追施化肥10公斤,猪肥1000公斤。第二次中耕时每亩追施化肥15公斤。拔节抽穗期人工辅助授
Select moderate fertility of yellow loam planting of 100 acres of spring corn, the variety for the second single, with 40 acres cut green for testing, 60 acres of not cut green for the control. 710 kg of cattle manure applied before the sowing. Transplanting fertilizers 50 kg, pig fat 750 kg. 3500 seedlings per acre seedlings. The first cultivator topdressing 10 kilograms of fertilizer per acre, pig fat 1000 kilograms. The second cultivation of topdressing fertilizer 15 kg per acre. Jointing Heading artificial auxiliary professor