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Position: Home > Articles > Effects of protein sources for milk replacers on growth performance and serum biochemical indexes of suckling calves Animal Nutrition 2015,1 (4)

Effects of protein sources for milk replacers on growth performance and serum biochemical indexes of suckling calves

作  者：
K. Huang;Tiebin Yan;Bingwen Si;Gaofeng Xu;Jiangpeng Guo;Feng Guo;Chengjian Yang;Qiyu Dia
单  位：
Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing Key Laboratory of Dairy Nutrition, Beijing 100081, China;The Animal Husbandry Station of Beijing, Beijing 100029, China.;Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing Key Laboratory of Dairy Nutrition, Beijing 100081, China.;College of Animal Science, Tarim University, Alaer 843300, China.
关键词：
Calf;Growth performance;Milk protein replacement;Milk replacer;Serum biochemical parameters;Vegetable protei
摘  要：
This study investigated the effects of protein sources for milk replacers on growth performance and serum biochemical indexes of suckling calves. Fifty Chinese Holstein bull calves with similar BW and age were randomly allocated to 5 groups (1 control and 4 treatments) of 10 calves in each group. Five types of milk replacers were designed to have the same level of energy and protein. The protein source for milk replacers of the control group was full milk protein (MP). The protein source of milk replacers of the 4 treatment groups was composed of MP and one vegetable protein (VP) (30 and 70% of total protein). The 4 types of VP were soybean protein concentrate (SP), hydrolyzed wheat protein (WP), peanut protein concentrate (PP), and rice protein isolate (RP). Results of the experiment showed: 1) there was no significant difference on average daily gain (ADG) and feed:gain ratio (F:G) among the MP, SP and RP groups (P > 0.05), whereas the ADG and F:G of the WP and PP groups were significantly lower compared with the MP group (P < 0.05); 2) there was not a significant difference in withers height, body length and heart girth among treatment groups compared with the MP group (P > 0.05). Thereby the 4 VP milk replacers had no adverse effects on body size of calves; 3) all groups showed no significant difference in the serum contents of urea nitrogen, total protein, albumin, globulin, β-hydroxybutyrate, growth hormone, insulin-like growth factor-1, and the ratio of albumin to globulin (A:G) (P > 0.05). In conclusion, SP or RP (accounts for 70% of the total protein) as calf milk replacers could substitute MP, whereas wheat gluten and PP had a significant adverse effect on growth performance in this experiment.

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