Effects of Different Diet Structures on Growth and Development and Serum Biochemical Indices of Holstein Male Calves

LI Bo, ZHANG Yuanqing, CHENG Jing, JIN Guang, WANG Xi, WANG Dongcai, XU Fang, ZHANG Dandan

doi:10.3969/j.issn.1006-267x.2019.06.028

Chinese Journal of Animal Nutrition >

2019 , Vol. 31 >Issue 6: 2672 - 2681

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.06.028

Molecular Nutrition

Effects of Different Diet Structures on Growth and Development and Serum Biochemical Indices of Holstein Male Calves

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Institute of Animal Husbandry and Veterinary Medicine, Shanxi Academy of Agricultural Science, Taiyuan 030032, China

Received date: 2018-11-23

Online published: 2019-06-17

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Abstract

The aims of this experiment were to study the effects of different diet structures on growth performance, slaughter performance and serum biochemical indices of Holstein male calves. Forty healthy Holstein male calves with body weight of (42±5) kg and similar days of age[(14±3) d] were randomly divided into 4 groups with 10 calves in each group, and were fed with different structure diets. Trial group Ⅰ:milk replacer+pellet diet+Chinese wildrye; trial group Ⅱ:milk replacer+Chinese wildrye; trial group Ⅲ:milk replacer+pellet diet; trial group Ⅳ:milk replacer. The experiment lasted for 9 weeks, with 1 week of adaption period and 8 weeks of formal period. The results showed as follows:1) the final body weight and average daily gain of trial groups Ⅰ and Ⅲ were significantly higher than those of trial groups Ⅱ and Ⅳ (P<0.05). There was no significant difference in the ratio of feed to gain among all groups (P>0.05), and the ratio of feed to gain of trial group Ⅳ was decreased by 31.1%, 45.03% and 41.7% compared with trial groups Ⅰ, Ⅱ and Ⅲ. 2) At the end of the experiment, the body height and bust of trial group Ⅲ were significantly higher than those of trial groups Ⅱ and Ⅳ (P<0.05), and the growth rate of body height, bust and hip height of trial group Ⅲ were significantly higher than those of trial groups Ⅱ and Ⅳ (P<0.05). 3) There were no significant differences in slaughter performance indices among all groups (P>0.05). 4) The liver weight, lung weight and kidney weight of trial group Ⅲ were significantly higher than those of trial groups Ⅱ and Ⅳ (P<0.05), and the kidney weight/empty body weight of trial group Ⅰ was significantly higher than that of trial group Ⅱ (P<0.05). 5) At the end of the experiment, the glucose and urea nitrogen contents and glutamic-alanine aminotransferase activity in serum of trial groups Ⅰ and Ⅲ were significantly higher than those of trial groups Ⅱ and Ⅳ (P<0.05), the serum non-esterified fatty acid content of trial group Ⅱ was significantly lower than that of trial groups Ⅰ, Ⅲ and Ⅳ (P<0.05), the serum triglyceride content of trial group Ⅱ was significantly higher than that of trial groups Ⅰ, Ⅲ and Ⅳ (P<0.05), the serum growth hormone content of trial group Ⅲ was significantly higher than that of trial groups Ⅰ and Ⅱ (P<0.05). In conclusion, under this experimental conditions, the diet structure of milk replacer+pellet diet can improve the growth performance of male calves, and achieve the effect of promoting its growth and development.

Key words： diet structure; Holstein male calves; growth performance; slaughter performance

Cite this article

LI Bo, ZHANG Yuanqing, CHENG Jing, JIN Guang, WANG Xi, WANG Dongcai, XU Fang, ZHANG Dandan . Effects of Different Diet Structures on Growth and Development and Serum Biochemical Indices of Holstein Male Calves[J]. Chinese Journal of Animal Nutrition, 2019 , 31(6) : 2672 -2681 . DOI: 10.3969/j.issn.1006-267x.2019.06.028

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