Faculty of Veterinary Medicine and Animal Science, Postgraduate Program in Animal Science, Federal University of Mato Grosso Do Sul, UFMS, Campo Grande, MS, Brazil.
Department of Animal Production, Faculty of Agricultural Sciences, Lúri University, Unango University Campus, Sanga 3302, Niassa, Mozambique.
Trop Anim Health Prod. 2022 Jul 20;54(4):231. doi: 10.1007/s11250-022-03241-4.
This study aimed to evaluate the effect of regrowth ages and the use of powdered molasses on nutritional characteristics of Zuri grass (Megathyrsus maximus) silages. A completely randomized design was used, in a 3 × 3 factorial scheme: three regrowth ages (65, 80, and 95 days) and three inclusion levels of powdered molasses of sugarcane (0, 20, and 40 g), with four replications. The chemical composition, fermentation parameters, in vitro digestibility, and in vitro degradation kinetics of the silages were evaluated. Greater dry matter (DM) contents were observed in silages with 95 days with 40 g of molasses. The 65 days of regrowth silages with 40 g of molasses had greater in vitro digestibility of dry matter compared to other treatments. However, lower pH values, N-NH, DM losses, gas losses, and density were observed in silages with 95 days of regrowth with 40 g of molasses. It is recommended to cut the Zuri grass in the range of 80 to 95 days of regrowth with the addition of 40 g/kg of molasses in powders for the production of silages.
本研究旨在评估再生年龄和使用糖蜜粉对 Zuri 草（Megathyrsus maximus）青贮饲料营养特性的影响。采用完全随机设计，3×3 析因方案：三个再生年龄（65、80 和 95 天）和三个甘蔗糖蜜粉添加水平（0、20 和 40 g），每个处理重复四次。评估了青贮饲料的化学成分、发酵参数、体外消化率和体外降解动力学。添加 40 g 糖蜜的 95 天再生青贮饲料的干物质（DM）含量较高。添加 40 g 糖蜜的 65 天再生青贮饲料的干物质体外消化率高于其他处理。然而，在添加 40 g/kg 糖蜜粉的 95 天再生青贮饲料中，pH 值、N-NH、DM 损失、气体损失和密度较低。建议在 80 至 95 天的再生期内收获 Zuri 草，并添加 40 g/kg 的糖蜜粉进行青贮饲料的生产。
