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首页> 外文会议>The 18th Asian-Pacific Weed Science Society Conference >EFFECTS OF THREE CRUCIFEROUS WEEDS ON YIELD AND YIELD COMPONENTS OF WINTER WHEAT (TRITICUM AESTIVUM)
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EFFECTS OF THREE CRUCIFEROUS WEEDS ON YIELD AND YIELD COMPONENTS OF WINTER WHEAT (TRITICUM AESTIVUM)

机译：三种十字花科杂草对冬小麦产量的影响

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In order to evaluate the damage and competitive ability of three broadleaf weeds (turnip weed: Rapistrum rugosum, wild mustard: Sinapis arvensis, tansy mustard: Descurainia sophia) with winter wheat (Triticum aestivum, L.CV.: C-73-5) an experiment was conducted in 2000 in Iran. The experimental design was complete block with factorial arrangement of treatments and four replications. Treatments included above three weed species and four weed densities (0,4,8 and 16 plants per m~2). Wheat density was fixed at 450 plant per m~2. Results showed that turnip weed emerged earlier, were taller, had higher leaf area and competition ability than other two weeds. It was observed that relative growth rate (RGR) of turnip weed and wild mustard was greater than wheat. Turnip weed had the greatest leaf area index (LAI), crop growth rate (CGR) and accumulation rate compared to wild mustard and tany mustard. Turnip weed caused greatest wheat yield reduction in 16 plant per m~2 density. Among wheat yield components, number of spike per m~2 and grains per spike decreased by increasing of weed species densities. The greatest reduction was observed in turnip weed. Wheat infertile spikletS decreased by increasin weed densities, specially in competition with turnip weed, but average wheat seed weight remained unchanged.
机译：为了评估三种阔叶杂草（芜菁杂草：菜，野芥菜：西纳比斯芥，艾菊芥子：地衣草）的危害和竞争能力对冬小麦的影响（Triticum aestivum，L.CV。：C-73-5） 2000年在伊朗进行了一项实验。实验设计是一个完整的模块，其中包括处理的因子安排和四次重复。处理包括以上三种杂草种类和四种杂草密度（每m〜2为0、4、8和16株植物）。小麦密度固定为450株/ m〜2。结果表明，与其他两种杂草相比，芜菁杂草出现得更早，更高，叶面积和竞争能力更高。观察到，萝卜杂草和野芥菜的相对生长率（RGR）大于小麦。相比野生芥末和鞣制芥末，芜菁杂草具有最大的叶面积指数（LAI），作物生长速率（CGR）和积累速率。芜菁杂草导致每m〜2密度的16株小麦减产幅度最大。在小麦单产中，杂草种类密度的增加使每m〜2穗数和穗粒数减少。在萝卜杂草中观察到最大的减少。小麦不育小穗数随杂草密度的增加而降低，特别是与芜菁杂草竞争时，但小麦平均粒重保持不变。

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