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首页> 外文期刊>Weed Science: Journal of the Weed Science Society of America >Total nonstructural carbohydrate trends in deeproot sedge (Cyperus entrerianus).
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Total nonstructural carbohydrate trends in deeproot sedge (Cyperus entrerianus).

机译：深层莎草（Cyperus entrerianus）中总的非结构性碳水化合物趋势。

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Native to temperate South America, deeproot sedge has naturalized throughout the southeastern United States. Often forming dense, homogenous stands, deeproot sedge has become widespread, invasive, and potentially harmful ecologically throughout the coastal prairie ecoregion of Texas. Possessing characteristics (rapid growth, generalized habitat requirements) of other weedy congeners (purple nutsedge and yellow nutsedge), its relatively recent expansion highlights the critical need to develop effective control techniques and strategies for this species throughout this endangered ecoregion. Research was performed to delineate total nonstructural carbohydrate (TNC) trends in deeproot sedge rhizomes for development of a phenologically based schedule for herbicide applications and mechanical treatments. Overall, TNC levels were greatest in May to August and lowest from October to January, regardless of study area. Apparently, deeproot sedge exerts little energy into seed production because TNC levels were continually replenished throughout the growing season. As such, foliar-herbicide application throughout the growing season should achieve total plant kill. Conversely, deeproot sedge rhizome TNC levels never fell below 30%, even during winter, which indicates that winter mechanical treatments or winter prescribed fires will not be effective because substantial rhizome reserves are present to support resprouting during the next growing season. Beyond a priori prevention, sequential herbicide applications combined with integrated, sequential, prescribed fire and herbicide treatments will be needed for long-term deeproot sedge control throughout its geographic range.
机译：深层莎草原产于南美洲温带，已遍及美国东南部。深根莎草通常形成密集，同质的林分，已遍及德克萨斯州沿海大草原生态区，在生态上已变得广泛，侵入性且潜在地有害。由于具有其他杂草同类（紫色和黄色等）的特征（快速生长，对生境的总体要求），其相对较新的扩展突出表明了在整个濒危生态区中对该物种开发有效控制技术和策略的迫切需要。进行了研究以描绘深根莎草根状茎中的总非结构性碳水化合物（TNC）趋势，以开发基于物候的除草剂应用和机械处理方案。总体而言，无论学习地区如何，TNC水平在5月至8月最高，而10月至1月最低。显然，深根莎草在种子生产中几乎没有消耗能量，因为整个生长季节中TNC的水平不断得到补充。因此，在整个生长季节施用叶面除草剂应能完全杀死植物。相反，即使在冬季，深根莎草的根茎TNC含量也从未降到30％以下，这表明冬季机械处理或冬季规定的大火将是无效的，因为存在大量的根茎储备以支持下一个生长季节的再发芽。除了先验预防外，在整个地理范围内进行长期深根s控制，还需要按顺序施用除草剂，并进行综合的，按顺序的，规定的除火和除草剂处理。

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