论文部分内容阅读
为江苏春玉米区特定生态条件下苏玉30的春季高产种植提供参考,采用二次正交回归组合设计方法,以施氮量和种植密度为试验因子,建立纯氮用量、密度与产量关系的数学模型,并模拟优选出苏玉30的适宜密度和氮用量。结果表明:密度对苏玉30产量及相关性状的影响均大于施氮量;提出苏玉30高产条件下单位面积的穗粒结构、叶面积指数、花后光合势、籽粒库容量、穗部性状等群体质量指标;得出苏玉30产量≥9 000kg/hm2的栽培方案:种植密度72 180~88 425株/hm2,纯氮用量309.0~370.5kg/hm2。
This study provided a reference for spring high yielding cultivation of Suyu 30 in spring maize area under the special ecological conditions in Jiangsu Province. Using quadratic orthogonal regression combined design method, with nitrogen and planting density as test factors, the relationship between the pure nitrogen and density and yield was established Mathematical model, and to simulate the Su Su 30 optimum density and nitrogen consumption. The results showed that the effects of density on the yield and related traits of Suyu30 were all greater than those of nitrogen application. The grain structure, leaf area index, anthesis flower potential, grain storage capacity, panicle traits per unit area of Suyu 30 The results showed that the planting density of Suyu 30 with the yield ≥9 000kg / hm2 was 72 180 ~ 88 425 plants / hm2 and the pure nitrogen was 309.0 ~ 370.5kg / hm2.