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通过作物规范化栽培的试验研究,可为生产提供一套投资少、收效快、经济效益高的技术措施。1985~1986年,在辽宁省昌图县八个点的玉米密度、施肥规范化栽培试验的结果表明:氮肥与密度对产量的影响较大:初步确定了最佳经济效益的栽培技术措施,即每亩施用32.5~37.5公斤的硫铵及25~45公斤的过磷酸钙。密度在3,000~3,100株/亩。在此条件下,一般每亩可获得350~500公斤的产量,且生产成本较低,有较好的经济效益.
Through standardized research on crop cultivation, we can provide a set of technical measures for production with less investment, quick efficiency and high economic efficiency. From 1985 to 1986, the results of standardized cultivation experiments of corn density and fertilizer at eight points in Changtu County of Liaoning Province showed that the effect of nitrogen fertilizer and density on the yield was large: the cultivation technique measure of the best economic benefit was preliminarily determined, that is, Acre applied 32.5 ~ 37.5 kg of ammonium sulfate and 25 ~ 45 kg of superphosphate. The density of 3,000 ~ 3,100 plants / mu. Under this condition, the output of 350 to 500 kilograms per mu is generally available, and the production cost is lower, which has good economic benefits.