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中国农学通报

中国农学通报 ›› 2011, Vol. 27 ›› Issue (15): 40-43.

所属专题： 水稻

• 农学 农业基础科学 • 上一篇    下一篇

不同栽植密度对优质杂交稻群体生长的影响

吕荣海   

  • 收稿日期:2010-12-09 修回日期:2011-02-25 出版日期:2011-06-25 发布日期:2011-06-25
  • 基金资助:

    福建省现代农业水稻产业技术体系建设；福建省农业厅科技项目（2009-04）

Effects of Planting Density on the Population Growth of Fine Quality Hybrid Rice

  • Received:2010-12-09 Revised:2011-02-25 Online:2011-06-25 Published:2011-06-25

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摘要：

此文以优质杂交稻‘宜优673’为材料，研究了不同栽植密度对优质杂交稻群体生长的影响。结果表明：（1）稻谷产量与栽植密度呈抛物线型相关，适宜的栽植密度为1 m2 21.43~25丛；随栽植密度的增加，最高茎蘖数和1 m2穗数增加，而成穗率和每穗粒数减少，于是合理密植的处理形成了较大的库容量；不同栽植密度间的结实率和千粒重则差异不大。（2）随栽植密度的增加，移栽后各时期的干物质生产力也提高，抽穗前积累的结构性物质和贮藏性物质以及抽穗后的净光合物质都逐渐增加，为建成较大的库容量并维持库源平衡提供了物质基础。（3）要提高群体生长率（CGR）必须提高叶面积指数（LAI），而各时期的LAI都随栽植密度的提高而增加。因此，高的群体生长率必须要合理密植。

关键词: 日变化, 日变化

Abstract:

The experiments were conducted to study the effects of planting density on the population growth of fine quality hybrid rice with ‘Yiyou 673’ as experimental material. The results showed that the parabola curve could be used to describe the relationship between rice yield and planting density. The suitable planting densities were 21.43-25 hole/m2. With the increase of planting density, the maximum tillers and panicles per square meter increased, while spike rate and grains per spike declined, and thus, the treatment of suitable planting density formed a larger storage capacity. The seed setting rate and 1000-grain weight showed no significant difference among planting density treatments. With the increase of planting density, the dry matter productivity also increased at different stages after transplanting, and then, the accumulation of structural and storage substances before heading & photosynthetic substance after heading all increased gradually, which provided the material basis on forming a larger storage capacity and maintaining sink-source balance. To improve the crop growth rate (CGR) had to improve the leaf area index (LAI), while the LAI increased at different stages with the increase of planting density. Therefore, the high CGR required rational close planting.

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