FECAL CONSISTENCY AS RELATED TO DIETARY-COMPOSITION IN LACTATING HOLSTEIN COWS
FECAL CONSISTENCY AS RELATED TO DIETARY-COMPOSITION IN LACTATING HOLSTEIN COWS
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DOI：
10.3168/jds.s0022-0302(93)77436-6
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发表时间：
1993-04-01
影响因子：
3.5
通讯作者：
STALLINGS, CC
中科院分区：
文献类型：
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作者：
IRELANDPERRY, RL;STALLINGS, CC
本试验旨在研究泌乳牛饲粮纤维和蛋白质百分比及来源与粪便稠度的关系。30头荷斯坦奶牛被随机分配到6个TMR组中的一个，共4个21 d期。TMR的ADF含量为17%或25%，添加豆粕时蛋白质含量为15%或22%，添加谷蛋白和豆粕时蛋白质含量为22%。两种饲料组合为玉米青贮加或不加苜蓿。采用四点目视观察量表评估粪便稠度。较低的膳食纤维降低了粪便pH值、评分、NDF和ADF，但增加了粪便DM和淀粉。较高的豆粕比例降低了粪便DM和粪便评分。饲料源对粪便DM、NDF、ADF和淀粉有影响，但对pH和评分没有影响。根据饲粮成分和奶牛参数预测粪便评分，饲粮DM百分比和4% FCM是最相关的变量。从饲料和奶牛参数中准确预测粪便一致性评分是不可能的。
A trial was designed to study the relationships of dietary fiber and protein percentage and source to fecal consistency in lactating cattle. Thirty Holstein cows were assigned randomly to one of six TMR through four 21-d periods. The TMR were formulated to contain 17 or 25% ADF and CP of 15 or 22% with soybean meal supplementation or 22% with a combination of com gluten and soybean meals. Two forage combinations were corn silage with or without alfalfa. Fecal consistency was evaluated using a four-point visual observation scale. Lower dietary fiber reduced fecal pH, score, NDF, and ADF but increased fecal DM and starch. A higher percentage of soybean meal lowered fecal DM and fecal score. Forage source affected fecal DM, NDF, ADF, and starch, but not pH or score. Prediction of fecal score from dietary components and cow parameters resulted in dietary DM percentage and 4% FCM as the most related variables. Accurate prediction of fecal consistency score from dietary and cow parameters was not possible.