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1990—1991年度在濉溪县和宿县,通过小区试验与大田示范,研究了淮北地区小麦玉米吨粮田系统中夏玉米的密度与氮素效应。建立了产量及产量构成因素的综合效应方程,并对其进行了解析。分析了产量构成因素与产量及光合面积与产量形成的关系。研究结果表明,掖单13号品种在本试验条件下的最高亩产量为715.4公斤,达到最高产量的密度为每亩5371株,亩施氮量为20.3公斤。其产量构成及主要生育指标是:每亩5210穗,每穗478粒,千粒重305.3克;叶面积系数开花期为6.75,成熟期为3.35;亩干物重开花期为614公斤,成熟期为1608.9公斤。
In 1990-1991 in Suixi County and Suxian County, through field trial and field demonstration, the density and nitrogen effect of summer maize on wheat-corn-grain system in Huaibei area was studied. The comprehensive effect equation of production and yield components was established and analyzed. The relationship between yield components and yield, photosynthetic area and yield formation was analyzed. The results showed that the highest yield of Yedan 13 under the test conditions was 715.4 kg and the highest yield reached 5371 plants per mu and 20.3 kg of nitrogen per mu. The yield components and main fertility indices were as follows: 5210 spikes per acre, 478 spikes per panicle, 305.3 grams of 1000-grain weight; leaf area coefficient of flowering of 6.75, maturity of 3.35; acres of dry matter flowering of 614 kg, maturity of 1608.9 kg .