Effects of Starters with Different Neutral Detergent Fiber Levels on Slaughter Traits, Organ Indexes and Development of Stomachus Compositus of Dairy Calves

REN Chunyan, BI Yanliang, DU Hanchang, YU Bo, TU Yan, GUO Yanli, DIAO Qiyu

doi:10.3969/j.issn.1006-267x.2018.06.046

2018 , Vol. 30 >Issue 6: 2402 - 2410

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.06.046

Molecular Nutrition

Effects of Starters with Different Neutral Detergent Fiber Levels on Slaughter Traits, Organ Indexes and Development of Stomachus Compositus of Dairy Calves

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1. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;
2. Key Laboratory of Feed Biotechnology of Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
3. Beijing Key Laboratory for Dairy Cow Nutrition, Beijing 100081, China;
4. Shandong Yinxiangweiye Group Co., Ltd., Heze 274400, China

Received date: 2017-11-16

Online published: 2018-06-20

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Abstract

The objective of this study was to determine the effects of starters with different neutral detergent fiber (NDF) levels on slaughter traits, organ indexes and development of stomachus compositus of dairy calves. Sixty newborn dairy calves (24 females and 36 males) with similar birth weight[(42.0±2.5) kg] and enough colostrum supplemented were randomly assigned to four groups with 9 male and 6 female calves each group. All calves were weaned at 70 days of age. Groups A, B, C, and D were fed one of the four starters with NDF levels (measured values) of 12.85%, 19.91%, 26.99%, and 34.04%, respectively. The experiment lasted for 112 days. The results showed as follows:body weight gain in group B was significantly higher than those in groups C and D (P<0.05). Dressing percentage and net meat rate in group B were significantly higher than those in group D (P<0.05). Group B also had higher carcass weight, ratio of meat to bone and meat percentage of carcass compared with the other three groups, but the differences were not significant (P>0.05); about the development of stomachus compositus, rumen weight percentage of stomachus compositus total weight and reticulum weight percentage of stomachus compositus total weight were significantly higher in group B than in group D (P<0.05), while omasum weight percentage of stomachus compositus total weight was significantly higher in group D than in group A (P<0.05); groups A and B had significantly higher pH in rumen compared with groups C and D (P<0.05). In conclusion, starter with 19.91% NDF for dairy calves at 15 to 112 days of age can improve the body weight gain, slaughter traits, and promote the development of organs and gastrointestinal tracts.

Key words： dairy calf; neutral detergent fiber level; starter; feed intake; slaughter trait; organ index; stomach development of stomachus compositus

Cite this article

REN Chunyan, BI Yanliang, DU Hanchang, YU Bo, TU Yan, GUO Yanli, DIAO Qiyu . Effects of Starters with Different Neutral Detergent Fiber Levels on Slaughter Traits, Organ Indexes and Development of Stomachus Compositus of Dairy Calves[J]. Chinese Journal of Animal Nutrition, 2018 , 30(6) : 2402 -2410 . DOI: 10.3969/j.issn.1006-267x.2018.06.046

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