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Replacing corn grain with a wet byproduct from cassava starch extraction on apparent digestibility of nutrients in beef cattle 收藏

木薯淀粉提取对肉牛营养物质消化率取代玉米粒用湿副产品
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作者
ABRAHAO, José Jorge dos Santos
关键词
beef cattle; cassava byproduct; digestibility; energy; feeding; feedlot.
关键词译文
肉牛;木薯的副产品;消化率;能源;喂养;饲养场。
页码
1447-1453
DOI
10.1590/S1516-35982006000500026
来源信息
Revista Brasileira de Zootecnia ISSN：1516-3598, 2006年, 35卷, 4期, 1447-1453页
摘要
Twenty crossbred bulls (1/2 and 3/4 Bos taurus x Bos indicus) averaging 24 months of age and 532 kg of body weight at the beginning of the experiment were used. Animals were randomly assigned to five treatments (four replicates/treatment) in a completely randomized design to evaluate the effect of replacing corn grain with a wet byproduct of cassava starch extraction on apparent digestibility of nutrients. Bulls were fed diets containing sorghum silage and one of the following levels of cassava byproduct in the concentrate: 0, 25, 50, 75 or 100%. No significant differences were observed for apparent digestibility of nutrients that averaged: 65.42% (dry matter), 68.30% (crude protein), 67.72% (ether extract), 49.58% (neutral detergent fiber), 50.71% (acid detergent fiber), and 81.79% (nonfiber carbohydrates). The contents of TDN (65.47%) and ME (2.36 Mcal/kg) also did not differ among diets. Only apparent digestibility of total carbohydrates differed across diets: Y= -0.0684N + 0.0015N2 + 63.756; R2 = 0.9122. Replacing corn grain with cassava byproduct did not change apparent digestibility of nutrients, except for total carbohydrates.
摘要译文
二十杂交公牛（1/2和3/4普通牛X瘤牛）平均24月龄和532公斤的体重在实验开始时被使用。TS（4个重复/处理）以完全随机设计，以评估与木薯淀粉提取物对营养物质消化率的湿副产品代替玉米粒的效果。公牛饲喂含有高粱青贮和木薯副产品在浓缩物以下级别之一饮食：0，25，50，75或100％。观察对营养素消化率即平均无显著差异：65.42％（干物质），68.30％（粗蛋白），67.72％（乙醚提取物），49.58％（中性洗涤纤维），50.71％（酸性洗涤纤维）和81.79％（nonfiber碳水化合物）。 TDN（65.47％）和ME（2.36兆卡/公斤）的内容，也没有饮食各不相同。只有在整个日粮总碳水化合物的消化率差异：Y \x3d -0.0684N 0.0015N SUP 2 / SUP 63.756; - [R SUP 2 / SUP \x3d 0.9122。替代玉米粒木薯副产品没有改变养分表观消化率，除了总碳水化合物。
ABRAHAO, José Jorge dos Santos. Replacing corn grain with a wet byproduct from cassava starch extraction on apparent digestibility of nutrients in beef cattle[J]. Revista Brasileira de Zootecnia, 2006,35(4): 1447-1453