ZHANG Zhe,DONG Ya-pei,YANG Liu,et al.Effects of Planting Density on Main Agronomic and Quality Traits of Early Maturity Maize Hybrids in Daqing Area[J].HEILONGJIANG AGRICULTURAL SCIENCES,2019,(06):15-20.[doi:10.11942/j.issn1002-2767.2019.06.0015]
种植密度对大庆地区早熟玉米杂交种主要农艺性状和品质性状的影响
- Title:
- Effects of Planting Density on Main Agronomic and Quality Traits of Early Maturity Maize Hybrids in Daqing Area
- Keywords:
- planting density; Daqing area; early maize; agronomic characters; quality traits
- 文献标志码:
- A
- 摘要:
- 为促进大庆地区玉米高效栽培，本试验采用二因素裂区试验，选用克单14、克玉15、庆1337和庆1448四个玉米早熟杂交种，设置5.0万、7.5万、10.0万、12.5万和15.0万株· hm-2五个种植密度，分析其对主要农艺性状和品质性状的影响。结果表明：随着密度的增大，不同品种的植株株高、穗位高逐渐增加，变化幅度较小；而茎粗随之下降明显。所有品种的淀粉含量受种植密度的变化影响最小，多数品种脂肪和赖氨酸含量的变化受种植密度的影响不大。种植密度对田间空秆率影响很大，随着密度增加，空秆率也逐渐增加。种植密度对边际效应的影响明显，除克单14外，克玉15、庆1337与庆1448随着密度增加，边际效应指数逐渐增大。参试品种最适种植密度在10万~12.5万株·hm-2，其中克单14耐密性最好，随着密度的升高，主要农艺性状、品质性状和边际效应指数的变化最小。
- Abstract:
- In order to promote efficient cultivation of Maize in Daqing area,two-factor split plot experiment was conducted.Four early-maturing maize hybrids,Kedan 14,Keyu 15,Qing 1337 and Qing 1448,were selected.Five planting densities of 50 000,75 000,100 000,125 000 and 150 000 plants〖DK1〗·hm-2 were set up to analyze their effects on main agronomic and quality traits.The results showed that with the increase of density,plant height and ear height of different varieties increased gradually,with a small change,while stem diameter decreased significantly.The starch content of all cultivars was least affected by the change of planting density,and the change of fat and lysine content of most cultivars was not affected by planting density.Planting density had a great influence on the rate of empty stalk in the field.With the increase of planting density,the rate of empty stalk increases gradually.The effect of planting density on marginal effect was obvious.Except Kedan 14,Keyu 15,Qing 1337 and Qing 1448 gradually increase with the increase of planting density.The optimum planting density of the tested varieties ranged from 100 000 to 125 000 plants〖DK1〗·hm-2,of which Kedan 14 had the best density tolerance.With the increase of density,the changes of main agronomic traits,quality traits and marginal effect index were the smallest.
参考文献/References:
［1］路立平，赵化春，赵娜，等．世界玉米产业现状及发展前景[J]．玉米科学，2006（5）：13-15.
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备注/Memo
收稿日期：2019-01-21