Matulka Ray A, Wickramasinghe Janaka, Dohms Juliane, Ribeiro Flavio Rodrigues Borges, Appuhamy Ranga
Burdock Group, 859 Outer Road, Orlando, FL 32814, USA.
Department of Animal Science, Iowa State University, 313G Kildee Hall, Ames, IA 50011, USA.
Animals (Basel). 2022 Oct 21;12(20):2875. doi: 10.3390/ani12202875.
This study examined the effects of Sangrovit, a plant extract (MCE) preparation on feed intake, growth, blood chemistry, and tissue-residue levels of calves. Twenty male and 20 female calves (~5 d of age) were assigned to one of four daily Sangrovit doses: 0.0 and 0.0 (CTL), 2.0 and 4.0 (D1), 5.0 and 10.0 (D2), and 10.0 and 20.0 (D3) g/calf in pre-weaning (5 to 49 d of age) and post-weaning (50 to 95 d of age) periods, respectively. Sangrovit doses were fed in milk replacer pre-weaning and top-dressed on calf starter post-weaning. Milk replacer and calf starter intake was recorded daily. Body weight, hematology, and serum chemistry were measured at 5, 49, and 95 d of age. Calves were slaughtered at 95 d of age for MCE tissue residue analysis. Compared to CTL, D1 increased milk-replacer intake (4.90 to 5.09 L/day), but decreased calf starter intake pre- (0.65 to 0.53 kg/d) and post-weaning (3.42 to 3.20 kg/d). No Sangrovit dose affected average daily gain. The hematology and blood chemistry of all treatment groups fell within the ranges of healthy calves. Results showed no adverse effects of MCE on health and growth performance of calves when fed up to 10.0 g/calf/day pre-weaning and up to 20.0 g/calf/day post-weaning.
本研究考察了植物提取物桑罗维特（MCE）制剂对犊牛采食量、生长、血液生化指标及组织残留水平的影响。将20头雄性和20头雌性犊牛（约5日龄）分配至四个每日桑罗维特剂量组之一：在断奶前（5至49日龄）和断奶后（50至95日龄）阶段，分别为每头犊牛0.0和0.0（CTL）、2.0和4.0（D1）、5.0和10.0（D2）以及10.0和20.0（D3）g。断奶前，桑罗维特剂量添加于代乳粉中；断奶后，撒在犊牛开食料表面。每日记录代乳粉和犊牛开食料的摄入量。在5、49和95日龄时测量体重、血液学指标和血清生化指标。在95日龄时宰杀犊牛，进行MCE组织残留分析。与CTL组相比，D1组增加了代乳粉摄入量（从4.90升至5.09升/天），但断奶前（从0.65降至0.53千克/天）和断奶后（从3.42降至3.20千克/天）犊牛开食料摄入量减少。各桑罗维特剂量组均未影响平均日增重。所有处理组的血液学指标和血液生化指标均在健康犊牛范围内。结果表明，断奶前每头犊牛每日饲喂高达10.0 g、断奶后每头犊牛每日饲喂高达20.0 g时，MCE对犊牛健康和生长性能无不良影响。
