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Biomass partitioning in corn as affected by reduced red-to-far-red light during the critical period of weed control.

机译：在杂草控制的关键时期，玉米中的生物量分配受到红到远红光减少的影响。

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摘要

Early-season weed control is essential to prevent yield loss in corn not only because of direct competition for resources, but also because weeds change the light quality environment of developing corn seedlings. Field experiments were conducted from 2003 to 2005 at the Arkell Research Station, Guelph, Ontario. Corn was grown hydroponically at a density of 40 000 plants ha-1. Weeds were present from corn emergence until 4, 6, 8 and 10 leaf tips and silking. Root:shoot decreased, root and shoot (leaf) dry weights decreased, rate of leaf appearance was delayed, and height increased relative to the weed-free control in the corn sampled prior to silking. As well, stem and ear weights were decreased at silking. These responses were typical of shade avoidance responses and show that low R:FR due to the presence of weeds during the critical period of weed control is detrimental to the growth and development of corn.
机译：早季除草对防止玉米产量损失至关重要，这不仅是因为资源的直接竞争，而且还因为杂草会改变正在发育的玉米幼苗的光质环境。从2003年至2005年，在安大略省圭尔夫的Arkell研究站进行了现场试验。玉米以4万株ha -1 的密度水培生长。从玉米出苗到4、6、8和10叶尖和丝化为止都存在杂草。根：相对于在抽穗前取样的玉米中的无杂草对照，根茎减少，根和枝干（叶）的干重减少，叶片出现速率延迟，并且高度增加。同样，在发丝时，茎和耳的重量也减少了。这些响应是典型的避荫响应，表明在杂草控制的关键时期由于杂草的存在而导致的低R：FR对玉米的生长和发育有害。

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  • 作者

    Liu, Joanne.;

  • 作者单位

    University of Guelph (Canada).;

  • 授予单位 University of Guelph (Canada).;
  • 学科 Agriculture Agronomy.;Biology Plant Physiology.;Agriculture Plant Pathology.
  • 学位 M.Sc.
  • 年度 2006
  • 页码 113 p.
  • 总页数 113
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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