Key Laboratory of Buffalo Genetics, Breeding and Reproduction Technology, Ministry of Agriculture and Rural Affairs and Guangxi Buffalo Research Institute, Chinese Academy of Agricultural Sciences, Nanning, China.
Anim Sci J. 2023 Jan-Dec;94(1):e13824. doi: 10.1111/asj.13824.
The objective of this study was to evaluate the effects of sugarcane tops (STs) and napiergrass (NG) silage on fermentative quality, nutritional value and milk yield in water buffaloes. Silage were prepared either conventionally without ST (C) or mixed with 25% (S1), 50% (S2), and 75% (S3) ST based on fresh matter. Twenty-eight lactating buffaloes were divided into four groups with seven replicates and fed four experimental diets containing the corresponding silages. The S3 silage fermented well with a higher (P < 0.05) lactic acid content and lower (P < 0.05) pH and ammonia-N level than those of other mixed silage. Silage with increasing ST proportions showed a significant increase (P < 0.05) in the apparent digestibility of dry matter, crude protein, organic matter, and gross energy. As a result, water buffalo fed S3 silage increased dry matter intake (P < 0.05) and tended to have higher milk yield and feed efficiency as compared with the C group. Our study indicates that adding ST improves NG silage fermentation and enhances the nutrient digestibility and milk production in water buffaloes, and mixing ratio of 25%NG and 75%ST had the highest lactate fermentation quality and presented a high feed value.
本研究旨在评估甘蔗梢（ST）和象草（NG）青贮对水牛发酵品质、营养价值和产奶量的影响。青贮是按照鲜物质分别用常规方法不添加 ST（C）或添加 25%（S1）、50%（S2）和 75%（S3）ST 混合制成。将 28 头泌乳水牛分为 4 组，每组 7 个重复，饲喂含有相应青贮料的 4 种试验日粮。S3 青贮发酵良好，乳酸含量较高（P<0.05），pH 值和氨态氮水平较低（P<0.05）。随着 ST 比例的增加，干物质、粗蛋白、有机物和总能的表观消化率显著增加（P<0.05）。结果表明，与 C 组相比，饲喂 S3 青贮的水牛干物质采食量增加（P<0.05），产奶量和饲料效率也有升高的趋势。本研究表明，添加 ST 可改善 NG 青贮发酵，并提高水牛的养分消化率和产奶量，其中 25%NG 和 75%ST 的混合比例具有最佳的乳酸发酵品质，表现出较高的饲料价值。
