甜高粱秸秆酒糟的青贮保存效果及其瘤胃降解特性研究

发布时间：2018-03-18 05:25

本文选题：甜高粱秸秆酒糟　切入点：玉米　出处：《饲料工业》2017年11期 　论文类型：期刊论文

【摘要】：试验旨在研究添加玉米后的甜高粱秸秆酒糟青贮保存效果、营养组成及其瘤胃降解特性。将甜高粱秸秆酒糟分别添加0、4%、8%玉米粉并接种乳酸菌进行青贮保存。每个处理重复4次。常温下贮存45 d后评定青贮品质和化学组成。试验选用3头装有永久性瘤胃瘘管的荷斯坦奶牛,采用尼龙袋法评定其干物质(DM)、粗蛋白质(CP)和中性洗涤纤维(NDF)的瘤胃降解率。结果表明,添加4%或8%的玉米发酵基质和乳酸菌发酵剂可显著改善甜高粱秸秆酒糟的青贮品质,p H值可达到青贮保存水平,能安全保存;添加玉米青贮后的酒糟CP、EE有所提高,NDF、ADF和ADL有所下降(P0.05)。经瘤胃内尼龙袋试验证明,添加玉米青贮提高了CP、NDF和ADF的瘤胃降解率(P0.05);因此,添加玉米粉到甜高粱秸秆酒糟中可以改善酒糟的青贮品质和营养价值,改善养分的降解性,更利于消化,以8%添加组效果最佳。
[Abstract]:The purpose of the experiment was to study the storage effect of sweet sorghum straw and distiller's grains silage after adding corn. Nutrient composition and rumen degradation characteristics. The sweet sorghum straw lees were added with 8% corn flour and inoculated with lactic acid bacteria for silage preservation. Each treatment was repeated for 4 times. The silage quality and chemical composition were evaluated after storage at room temperature for 45 days. Three Holstein cows with permanent rumen fistula were selected. The rumen degradation rates of DMN, CPP and NDF were evaluated by nylon bag method. Adding 4% or 8% corn fermentation substrate and lactic acid bacteria starter could significantly improve the silage quality of sweet sorghum straw lees, which could reach the level of silage preservation and could be safely preserved. After corn silage was added, the ADF and ADL of distiller's grains were increased. The results of rumen nylon bag test showed that the rumen degradation rate of CPNDF and ADF was increased by adding corn silage, and the rumen degradation rate of CPNDF and ADF was increased by adding corn silage. Adding corn powder to sweet sorghum straw lees could improve the silage quality and nutrient value of distiller's grains, improve the degradation of nutrients, and be more convenient for digestion.
【作者单位】：清华大学核能与新能源技术研究院;东北农业大学乳品科学教育部重点实验室;
【基金】：国家国际科技合作专项项目[2012DFG61720]
【分类号】：S816.53

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