Pronghorn (Antilocapra americana) evolved in grasslands with a diet composed of highly nutritious forbs. However, pronghorn habitat throughout North America has been lost to fragmentation and degradation. Additionally, the effects different cattle grazing regimes have on forb biomass, protein, and energy production for pronghorn are not well known in West Texas. We sampled forbs during the growing season in the months of September 2018 and 2019 to assess the effects of different cattle grazing regimes on forbs. We hypothesized rotational grazing would increase the nutritional quality of the forb community and overall forb production, compared to continuous grazing and no grazing. We randomly sampled pastures subject to continuous and rotational grazing, as well as ungrazed exclosures using 100, 96, and 64 1 m² plots, respectively. We collected all forbs in each plot and analyzed differences in nutritional composition and biomass production using redundancy analysis. We found that the effects of grazing varied by year. In wetter conditions, rotational grazing exhibited higher forb quality and biomass, while exclusion from grazing exhibited these results under drier conditions. The knowledge gained from this study helps resource professionals and landowners understand how cattle grazing affects forbs for pronghorn. This knowledge may be used to improve the suitability of pronghorn habitat through cattle grazing regimes.

叉角羚（Antilocapra americana）是在草原上进化而成的，其饮食由高营养的前腿组成。但是，整个北美的叉角羚栖息地已因碎片化和退化而消失。另外，不同的放牧方式对叉角羚的生物量，蛋白质和能量产生的影响在西德克萨斯州尚不为人所知。我们在2018年9月和2019年9月的生长季节中对福布斯进行了采样，以评估不同的放牧制度对福布斯的影响。我们假设与连续放牧和不放牧相比，轮流放牧将提高福布斯社区的营养质量和整个福布斯的生产。我们随机采样了经过连续和旋转放牧的牧场，并使用100、96和64 1 m进行了未磨砂的牧场分别为^2个地块。我们收集了每个样地中的所有前缘，并使用冗余分析分析了营养成分和生物量生产方面的差异。我们发现放牧的影响每年变化。在较湿的条件下，旋转放牧表现出较高的草皮质量和生物量，而在干燥的条件下，从放牧中排除则表现出这些结果。从这项研究中获得的知识可以帮助资源专业人士和土地所有者了解放牧牛群如何影响叉角羚的前叉。该知识可用于通过牛放牧制度来提高叉角羚栖息地的适应性。