Hydrolyzed soy protein isolate sustains high nutritional performance in veal calves.
Hydrolyzed soy protein isolate sustains high nutritional performance in veal calves.
复制标题
水解大豆分离蛋白可维持小牛的高营养性能。
DOI：
10.3168/jds.s0022-0302(95)76629-2
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发表时间：
1995
影响因子：
3.5
通讯作者：
J. Sissons
中科院分区：
文献类型：
--
作者：
J. Lallès;R. Toullec;P. Pardal;J. Sissons
将含有脱脂奶粉、水解大豆分离蛋白提供的乳清和大豆蛋白的混合物或加热大豆粉的牛奶混合物饲喂1月龄犊牛101 d。分离物和面粉分别提供56%和72%的膳食蛋白质。在处理的9 ~ 14 d和65 ~ 70 d之间测定饲料成分的消化率。通过测定瘤胃pH值、甘油三酯和葡萄糖浓度的血浆动力学以及木糖吸收来评价消化功能。还记录了抗体产生。生长和胴体特性是令人满意的控制饮食和饮食的基础上大豆分离物，部分原因是高表观消化率的蛋白质和缺乏抗体合成的大豆分离物。相比之下，来自大豆粉的蛋白质消化不良且具有高度免疫原性。瘤胃pH值在2.5小时餐后不受饮食治疗。血浆中甘油三酯和葡萄糖浓度的餐后变化表明，这两种基于大豆的饮食缺乏皱胃凝血。血浆中木糖浓度仅受日粮处理和小牛年龄的轻微影响。水解大豆蛋白适合小牛犊，可以占至少一半的蛋白质摄入量。
Milk replacers containing skim milk powder or a mixture of whey and soy protein provided by a hydrolyzed soy protein isolate or a heated soybean flour were fed to 1-mo-old calves for 101 d. The isolate and the flour provided 56 and 72% of dietary proteins, respectively. Digestibility of feed constituents was measured between 9 to 14 d and 65 to 70 d of treatment. Digestive function was evaluated by measurement of ruminal pH, plasma kinetics of triglyceride and glucose concentrations, and xylose absorption. Antibody production was also recorded. Growth and carcass characteristics were satisfactory for the control diet and the diet based on soy isolate, partly because of high apparent digestibility of protein and lack of antibody synthesis in response to soy isolate. In contrast, protein from soybean flour was poorly digested and highly immunogenic. Ruminal pH at 2.5 h after the meal was unaffected by dietary treatments. Postprandial changes in concentrations of triglycerides and glucose in plasma suggested a lack of abomasal clotting with both diets based on soy. Xylose concentration in plasma was only slightly affected by dietary treatment and calf age. Hydrolyzed soy protein is suitable for veal calves and can account for at least half of protein intake.