奶牛和肉牛日粮淀粉和葡萄糖的营养调控及其评定的建议Effects of Starch and Glucose in Diets on Milk and Beef Production and the Evaluation of its Nutritive Value
冯仰廉;李胜利;张晓明;
摘要(Abstract):
谷物饲料干物质中的淀粉含量多在50%以上,全株玉米青贮的淀粉含量亦有30%。牛的玉米日粮生淀粉消化率比熟淀粉低,但熟淀粉由于瘤胃消化率很高,所以瘤胃后的可消化淀粉量很低。生糖前体能量(瘤胃丙酸+肠可消化淀粉)能明显提高产奶量和乳蛋白率,但导致乳脂率下降。须对生糖前体能量进行评定和调节,以提高产奶效率。对真胃灌注不同梯度的葡萄糖或淀粉均显着地提高了Kf和体脂肪及体蛋白质沉织,因此我国肉牛饲养标准提出的Kf(%)=11.7645+55.756(IDOM/FNDF)仍适用,但可进一步增加IDOM中的淀粉调控。
关键词(KeyWords): 奶牛;肉牛;葡萄糖;淀粉;营养调控;评定
基金项目(Foundation):
作者(Author): 冯仰廉;李胜利;张晓明;
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参考文献(References):
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