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首页> 外文学位 >Barley (Hordeum vulgare L.) competition: Effects on rapeseed/canola (Brassica campestris L. and Brassica napus L.) growth and yield.
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Barley (Hordeum vulgare L.) competition: Effects on rapeseed/canola (Brassica campestris L. and Brassica napus L.) growth and yield.

机译：大麦（Hordeum vulgare L.）竞争：对油菜/低芥酸菜子（油菜（Brassica campestris L.）和甘蓝型油菜（Brassica napus L.）的影响。

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摘要

Barley frequently becomes a problem weed in central Alberta when rapeseed/canola follows a barley grain crop in rotation. Experiments on crop genotype and density, weed density, relative time of weed emergence and time of weed removal were used to examine the rapeseed/canola (crop) - barley (weed) interaction.;No optimum seeding density for canola (B. campestris cv Tobin, B. napus cv Westar) grown under weedy conditions was identified. Canola branching and pod numbers were reduced when barley was present, which resulted in lower seed yields.;Canola seed yield declined as barley density increased. At barley densities below 50 plants/m;Barley emerging at different times relative to the crop reduced canola seed yield differentially. Yield loss ranged from 7 to 16 g/m;Brassica cultivars/lines with high weed-free seed yields usually maintained higher seed yields when barley was present. Under weedy conditions, the Brassica groups ranked by yield, as a percent of the weed-free value, were: Brassica juncea ;Canola seed yield reduction was proportional to the time barley remained in the crop. Mean reduction in seed yield was 1.3 g/m
机译：当油菜籽/油菜跟随大麦籽粒轮作时，大麦在阿尔伯塔省中部经常成为问题杂草。使用农作物基因型和密度，杂草密度，杂草出苗的相对时间以及除草时间进行实验，以检查油菜/油菜（作物）-大麦（杂草）之间的相互作用。鉴定了在杂草条件下生长的Tobin，B。napus cv Westar）。存在大麦时，双低油菜籽的分枝和荚果数量减少，导致种子产量降低；随着大麦密度的增加，双低油菜籽的产量下降。在大麦密度低于50株/ m的情况下；相对于农作物，不同时间出现的大麦不同程度地降低了油菜籽的产量。产量损失范围为7至16 g / m；当存在大麦时，无杂草种子产量高的甘蓝型品种/品系通常保持较高的种子产量。在杂草条件下，按产量（以无杂草值的百分比形式）排名的芸苔属组为：芸苔；芥花籽油的产量减少与大麦在作物中的停留时间成正比。种子平均减产1.3 g / m

著录项

  • 作者

    de St. Remy, Elizabeth Ann.;

  • 作者单位

    University of Alberta (Canada).;

  • 授予单位 University of Alberta (Canada).;
  • 学科 Agriculture Plant Culture.
  • 学位 Ph.D.
  • 年度 1991
  • 页码 218 p.
  • 总页数 218
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 老年病学;
  • 关键词

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