Limpograss [Hemarthria altissima (Poir.) Stapf and C. E. Hubb.] has been gaining ground in beef cattle production as a stockpiling option. This study evaluated canopy characteristics of stockpiled pastures of limpograss cultivar Floralta over two cool seasons. Treatments included canopy layers (upper third, middle, lower third) and plant fractions (leaf and stem) arranged in a randomized split block design. There were 12 paddocks (blocks) with 1.2 ha each. Response variables included forage mass, canopy height and density, proportion of leaf and stem, and leaf and stem nutritive value within each layer. Forage mass fluctuated throughout the season, varying from 4,410 kg dry matter (DM) ha^–1 in December to 7,220 kg DM ha^–1 in October. Canopy bulk density was greater in February compared with November and December (290 vs. 145 kg ha^–1 cm^–1), and similar to October and January (200 kg ha^–1 cm^–1, on average). The lower canopy layer had the greatest proportion of stem whereas the upper layer had greatest proportion of leaves. Leaf had greater in vitro digestible organic matter (IVDOM) (700 g kg^–1) compared with stem (600 g kg^–1). Leaf/stem ratio was greater in the upper layer (1.12), but similar between the middle and lower layers (0.4, on average). Leaf crude protein (CP) was greater than stem CP 70 vs. 20 g kg^–1), with no differences between stem CP across evaluation dates. Stockpiled limpograss maintained leaf and stem digestibility and can be used as an alternative to reduce feeding costs in North Florida during the cool season.

中文翻译：

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储存的'Floralta' limpograss 的冠层特征和营养价值

Limpograss [ Hemarthria altissima (Poir.) Stapf and CE Hubb.] 作为一种储存选择，在肉牛生产中取得了进展。本研究评估了在两个凉爽季节储存的软草栽培品种 Floralta 牧场的树冠特征。处理包括以随机分割块设计排列的冠层（上三分之一、中间、下三分之一）和植物部分（叶和茎）。有 12 个围场（块），每个围场 1.2 公顷。响应变量包括草料质量、冠层高度和密度、叶和茎的比例以及每层内的叶和茎营养值。整个季节的草料质量波动，从 12 月的 4,410 公斤干物质 (DM) ha ^–1到 7,220 公斤干物质 ha ^–1在十月。与 11 月和 12 月相比，2 月的树冠容重更高（290 对 145 kg ha ^–1  cm ^-1），与 10 月和 1 月相似（平均为 200 kg ha ^–1 cm ^-1）。下层冠层的茎比例最大，而上层的叶比例最大。与茎 (600 g kg –1 ) 相比，^叶子的体外可消化有机物质 (IVDOM) (700 g kg ^–1 ) 更高。上层叶/茎比较大（1.12），但中层和下层相似（平均为0.4）。叶粗蛋白 (CP) 大于茎 CP 70 vs. 20 g kg ^–1)，不同评估日期的茎 CP 之间没有差异。储存的林草保持叶和茎的消化率，可用作降低北佛罗里达寒冷季节饲养成本的替代品。