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首页> 外文期刊>Crop Research >Response of different sesame (Sesamum indicum) cultivars to the interference from red root pigweed (Amaranthus retroflexus).
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Response of different sesame (Sesamum indicum) cultivars to the interference from red root pigweed (Amaranthus retroflexus).

机译：不同芝麻（ Sesamum indicum ）品种对红根杂草（）干扰的响应。

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摘要

Amaranthus retroflexus is a problematic weed in sesame crop. Field experiment was carried out in 2007-08 growing season at the Research Farm of University of Tehran, Karaj, Iran, to evaluate the competitive ability of four sesame (Sesamum indicum) cultivars (Oltan, Varamin 2822, Naz unicuim and Karaj 1) in competition with red root pigweed at 0, 2, 4, 8 and 16 plants/m2. Sesame biological and grain yield loss under weed competition was investigated using empirical equation based on the Cousens's hyperbolic crop yield model. Sesame cultivars varied in their competitive ability against red root pigweed in terms of both yield and biomass measurements. Under weed free conditions Varamin 2822 (1179.2 kg/ha) and Karaj 1 (768.5 kg/ha) had the most and least grain yields, respectively. The highest and lowest biological yields were observed in Oltan (3866.82 kg/ha) and Naz unicuim (1896.92 kg/ha) in weed free plots, respectively. The maximum yield loss estimated from the Cousens's model was highest in Varamin 2822 (49.6%), while this was not more than 17.9% in Oltan indicating the higher competitive ability of Oltan.
机译：Amaranthus retroflexus 是芝麻作物中有问题的杂草。在伊朗卡拉伊德黑兰大学研究农场的2007-08生长季节进行了田间试验，以评估4种芝麻（）（Oltan，Varamin 2822， Naz unicuim和Karaj 1）以0、2、4、8和16株植物/ m 2 与红根杂草竞争。利用基于库森斯双曲线农作物产量模型的经验方程，研究了杂草竞争下芝麻的生物学和粮食产量损失。在产量和生物量方面，芝麻品种对红根杂草的竞争能力各不相同。在无杂草条件下，Varamin 2822（1179.2 kg / ha）和Karaj 1（768.5 kg / ha）的谷物产量分别最高和最低。在无草地块中，分别在奥尔坦（3866.82 kg / ha）和纳斯奇鱼（Naz unicuim）（1896.92 kg / ha）中观察到最高和最低的生物产量。根据库森斯模型估计的最大产量损失在Varamin 2822中最高（49.6％），而在奥尔坦中则不超过17.9％，表明奥尔坦具有更高的竞争能力。

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