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中国农学通报

中国农学通报 ›› 2011, Vol. 27 ›› Issue (9): 287-290.

所属专题： 玉米

• 农学 农业基础科学 • 上一篇    下一篇

高海拔地区玉米种植密度研究

高明文 张祯勇 陈代全 肖启银   

  • 收稿日期:2010-09-05 修回日期:2010-09-30 出版日期:2011-04-25 发布日期:2011-04-25

Study on Planting Density of Corn hybrid in High Elevation Region

  • Received:2010-09-05 Revised:2010-09-30 Online:2011-04-25 Published:2011-04-25

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摘要：

此试验在特定高海拔地区宽窄行栽培模式下，通过选用一个中杆中熟种（元玉3号）和一个高杆中晚熟种（正红311），设计了5.25、6、6.75、7.5、8.25万株/hm2 5个种植密度，研究了不同种植密度对玉米植株农艺性状（茎粗、株高、穗位高、折倒伏率等）和产量构成因素（穗数、穗粒数、千粒重）的影响。结果表明：株高、穗位高、穗高系数、折倒伏率随密度的增加呈增加趋势；而茎粗、穗粒数和千粒重随密度的增加呈下降趋势；有效穗数和产量随密度的增加呈先增后减的抛物线变化趋势。在此试验条件下及其类似生态区，元玉3号种植密度为7.19万株/hm2时，产量可达最高期望值12430.9 kg/hm2；正红311种植密度为6.84万株/hm2时，产量可达最高期望值12773.39 kg/hm2。

关键词: 芦笋, 芦笋, 性别, 化学鉴定

Abstract:

In this study, two corn hybrids, Yuan Yu 3 of mid-maturing and medium-stem, Zheng Hong 311 of late-maturing and high-stem, were used to study the effects of agronomic traits (such as stem diameter, plant height, ear height and lodging discount rate) and yield components (such as ears number, kernels per ear, 1000-kernel weight) under different planting densities (52500, 60000, 67500, 75000, 82500 plants/hm2). Treatments were arranged in a wide-narrow-row cultivation model in high elevation region. The results showed that with the increasing of density, plant height, ear height, spike position height coefficient and lodging discount rate increased; however stem diameter, kernels per ear, 1000-kernel weight decreased; ears number and yield showed a parabola curve of first increase and later drop. In this experimental condition and similar ecological zones, Yuan Yu 3 planting density was 72000 plants per hm2, the yield reached the highest was 12430.9 kg/hm2; Zheng Hong 311 planting density was 68400 plants per hm2, the yield reached the highest was 12773.39 kg/hm2.