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Reducing Smooth Sumac Dominance in Native Tallgrass Prairie

机译：减少高草原生草原上平滑的黄豆占主导地位

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Smooth sumac (Rhus glabra L.) is a resprouting shrub native to the tallgrass prairie region that increases in density without an active disturbance regime. Our objective was to use prescribed fire and herbicides to decrease smooth sumac density as a strategy to improve a degraded tall grass prairie remnant. In two separate experiments repeated in space and time, we used prescribed fire in combination with herbicides at various rates and two application methods to develop an effective management scheme for reducing smooth sumac. We used a randomized complete block design with 13 herbicide treatments and a control with three replicates in burned and non-burned areas. Results were similar in both experiments in which herbicide treatment and burning were the significant main effects. All herbicide treatments reduced smooth sumac stem density compared to the control, but no distinct advantage was detected regarding specific herbicide, application rate, or whether the herbicide was applied as a broadcast spray or with a hand-held wick. We expected burning to make the plant more susceptible to herbicides, but burning increased stem density. In this tallgrass prairie remnant, we determined that herbicides were the most effective management tool in reducing smooth sumac stem density.
机译：光滑漆树（Rhus glabra L.）是高草草原地区的原生发芽灌木，密度增加而没有活动的干扰机制。我们的目标是使用处方的火和除草剂来降低平滑漆树的密度，以此作为改善退化的高草草原残留物的策略。在时空上重复进行的两个独立实验中，我们以不同的比率将处方火与除草剂结合使用，并使用两种施用方法来制定有效的管理方案，以减少平滑漆树。我们使用了随机的完全区组设计，进行了13种除草剂处理，并在燃烧区和非燃烧区进行了3次重复的对照。在两个实验中结果相似，其中除草剂处理和燃烧是主要的主要作用。与对照相比，所有除草剂处理均降低了平滑的漆树茎密度，但在特定除草剂，施用量或除草剂是以喷洒喷雾剂还是手持灯芯的形式施用方面均未发现明显优势。我们希望燃烧能使植物对除草剂更敏感，但燃烧会增加茎的密度。在这种草丛大草原残留物中，我们确定了除草剂是减少光滑漆树茎密度的最有效的管理工具。

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