摘要
The intake and the total and partial digestibility of nutrients, the microbial efficiency, the nitrogen balance, the passage rates of ruminal digesta, the pH and the ammonia ruminal concentration in beef cattle fed diets containing tifton 85 haylage and sorghum silage in the following proportions: 100:0; 68:32; 34:66 and 0:100, respectively in DM basis. Four crossed animals (H × Z) fistulated in the rumen and abomasum, with average body weight of 364 kg were assigned to a 4 × 4 Latin square. The forage: concentrate ratio was 60:40, in DM basis. The daily intake of DM, OM, CP, total carbohydrates (TC), as well as the total apparent digestibility of CP, EE, NFC and NDF were not influenced by the diets, with mean values of 6.01, 5.69, 0.76, and 4.64kg/day and 67.94, 82.12, 84.43, and 53.57%, respectively. The intake of EE, NFC, NDF and TDN and the total apparent digestibility of DM, OM and TC linearly increased with the increment of sorghum silage in the forage. The ruminal and intestinal digestibility of DM, TC, NFC and NDF were not influenced by the diets. The pH was not influenced by the collection time or by the diets. The ammonia concentration was influenced by the collection times, estimating the maximum value of 13.14 mg/100 mL, at 2.90 hour after feeding. Ruminal digesta passage rates of 4.10, 4.22, 4.27, and 5.30%/hour were respectively estimated for diets containing 0, 32, 66, and 100% of sorghum silage in the forage. The level of sorghum silage in the diet did not influence the microbial efficiency. The use of Tifton 85 haylage associated with sorghum silage has shown to be a great alternative of forage for finishing beef cattle.
摘要译文
进气和营养物质的完全和部分消化的微生物效率的氮平衡，瘤胃食糜的通过率，pH和肉牛饲喂含蒂夫85 haylage和高粱青贮具有以下比例的氨瘤胃浓度：100：0; 68:32; 34:66和0：100，分别在DM的基础。四个交叉动物（高×Z）的瘘管在瘤胃和皱胃，平均体重为364公斤被分配到一个4×4拉丁方。饲草：浓缩比为60:40，在DM的基础。每日摄入的DM，OM，CP，总碳水化合物（TC），以及CP的总表观消化率，EENFC和NDF不是由饮食影响，具有6.01，5.69，0.76，和4.64千克/分别天和67.94，82.12，84.43，和53.57％，平均值。 EE中，NFC的摄入量，NDF和TDN和DM的总表观消化率，OM和TC线性增加高粱青贮的饲草增量。 DM的瘤胃和肠道消化率，TC，NFC和NDF不是由饮食的影响。将pH不是由收集时间或者由饮食的影响。氨浓度是由收集时间的影响，喂食后估计处2.90小时13.14毫克/ 100毫升，最大值。 4.10，4.22，4.27，和5.30％/小时的瘤胃食糜通过率分别为估计饮食含有0，32，66和100％的饲用高粱青贮。高粱青贮的饮食中的水平没有影响的微生物的效率。使用蒂夫顿85 haylage高粱青贮饲料相关的已被证明是牧草整理肉牛的理想替代品。