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首页> 外文期刊>Weed technology: A journal of the Weed Science Society of America >Competitiveness with weeds of soybean cultivars with different maturity and canopy width characteristics.
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Competitiveness with weeds of soybean cultivars with different maturity and canopy width characteristics.

机译：Competitiveness with weeds of soybean cultivars with different maturity and canopy width characteristics.

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摘要

Field studies were conducted in 2005 at five locations throughout Illinois (USA) to determine the effect of maturity date and canopy width characteristics of selected glyphosate-resistant soyabean cultivars on competitive ability against weeds. Natural weed populations at all sites were allowed to compete with the soyabean cultivars until the V1, V3, V5, or V7 growth stage and then removed with an application of glyphosate. Light-interception readings, weed control ratings, and soyabean yield were all measured to compare the cultivars. The cultivars of later maturities tended to withstand early season weed competition better and attained higher yields when the weeds were removed at later timings than those of earlier maturity. Although, canopy width differed moderately among the cultivars in some cases, canopy width had no effect on the ability of soyabeans to compete with weeds. Thus, choosing soyabean cultivars of later maturity might provide more flexibility in weed management and might reduce losses due to weeds, but that benefit needs to be balanced with yield potential.

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