【摘要】 报告了黑土平岗地上，在严重时斑病及早霜等不利条件下，对 ３个熟期玉米品种实现产量超１００６９０ｋｇ／ｈｍ２的生育性状、产量构成等客观因素进行了分析，指出玉米栽培不宜越区种植，要实现高产，必须在选用耐密型高产品种的前提下，加大科技投入力度，实行科学种田。更多还原

【Abstract】 Through planting 3 maturity length maize varieties in fertile plain. The paper analyzed a series of objective factors including growing - characters and yield components, under the condition of 10060 kg/km2 maize was obtained with the disadvantage of severe leaf spot and early frost. It also pointed out that late matured variety was unsuitable to plant at medium maturity planting area. The reason of high-yield was induced by selecting density-tolerant with high-yield maize variety, and executing scientific Planting method under foe supporting of science and technology.更多还原