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首页> 外文会议>Beltwide Cotton Conferences >WHEN CROPS BECOME WEEDS: DETERMINING CRITICAL INTERFERENCE PERIOD FOR ROUNDUP READY~(R) COTTON OR SOYBEAN
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WHEN CROPS BECOME WEEDS: DETERMINING CRITICAL INTERFERENCE PERIOD FOR ROUNDUP READY~(R) COTTON OR SOYBEAN

机译：当作物成为杂草时：确定Roundup Ready〜（R）棉花或大豆的关键干扰

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Research was conducted in 2004 at the Northeast Research Station in St. Joseph, La and in Lewiston, Rocky Mount, and Clayton North Carolina to determine the critical interference period for Roundup Ready (RR) cotton and RR soybean as weeds in RR soybean and RR cotton crops, respectively. In St. Joseph, PM 1218 BR cotton and DP 5644 RR soybean were evaluated as both the crop and weed. In North Carolina, only FM 989 RR cotton as a crop was evaluated with Asgrow 6202 RR soybean as the weed species. Weeds were planted with the crop approximately two inches from the drill and thinned to 32 plants per 20 row ft following emergence. Weeds were allowed to compete for 0, 1, 2, 3, 4, 5, 6, 7, and 8 wk in St. Joseph and 0, 1, 2, 4, 6, 8, 10, and 12 wk in NorthCarolina. Weeds were manually removed at each removal timing. Crop yield was determined following mechanical harvest. The experiments were designed as a randomized compete block with four replications. Data were subjected to analysis of variance and regression analysis.
机译：研究是在2004年在圣约瑟夫，洛杉矶和路易斯顿，岩石山和克莱顿北卡罗来纳州的东北研究站进行的，以确定RR大豆和RR中杂草的综合ruck rucket（rr）棉花和rr大豆的关键干扰期棉田作物分别。在圣约瑟夫，PM 1218 BR棉和DP 5644 RR大豆被评估为作物和杂草。在北卡罗来纳州，只有FM 989 RR棉作为作物评估为asgrow 6202 rr大豆作为杂草物种。杂草在钻头中占据大约两英寸的作物，并在出现后每20行FT减少到32株植物。允许杂草在圣约瑟夫和0,1,2,4,6,8,10和12周中竞争0,1,2,3,4,5,6,7和8周，在Northcarolina的12周。在每个删除时序手动删除杂草。机械收获后确定作物产量。实验设计为随机竞争块，具有四种复制。对变异性和回归分析进行分析。

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