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随着农业生产结构的调整,特别是畜牧养殖事业的发展,玉米生产越来越发挥重要作用。但在玉米栽培过程中,种植密度一直是争议不休的问题。为了探索最优密植方案,我们在1988年秋季设置此试验。一、试验设计1、基本情况试验田肥力中等,属砂质壤土,前作早稻。总面积为0.6亩。供试品种为翼旦16号,中熟型。播种时间在7月28日。整个生育期的管理各小区均同;苗期每小区施用1/5担沤水,6叶1心期每小区施尿素0.6斤,拔节期每小区施碳铵2.4斤,在小喇叭口期用甲胺磷2000倍液灌顶防治玉米螟,整个生育期中耕锄草2次。
With the adjustment of agricultural production structure, especially the development of animal husbandry and breeding, corn production plays an increasingly important role. However, in the corn cultivation process, planting density has always been a controversial issue. In order to explore the optimal planting plan, we set the test in the fall of 1988. First, the experimental design 1, the basic situation Experimental field Fertility medium, sandy loam, before the early rice. The total area of 0.6 acres. Test varieties for wing day 16, in cooked type. Seeding time on July 28. The entire growth period of management of all the same communities; seedlings per district application 1/5 Tam water, 6 leaves a heart of each district urea 0.6 kg, jointing each district facilities ammonium bicarbonate 2.4 pounds, in the small bell period Methamidophos 2000 times to prevent and control corn borer, 2000 times in the whole growth period.