Energy Metabolism and Requirement of Growing Qinchuan Cattle

CHEN Yan; WANG Zhisheng; ZHANG Xiaoming; WANG Jiang; ZOU Huawei; JIANG Xingde; WU Dan

doi:10.3969/j.issn.1006-267x.2016.05.035

Chinese Journal of Animal Nutrition >

2016 , Vol. 28 >Issue 5: 1573 - 1580

DOI: https://doi.org/10.3969/j.issn.1006-267x.2016.05.035

SHORT COMMUNICATIONS

Energy Metabolism and Requirement of Growing Qinchuan Cattle

CHEN Yan ,
WANG Zhisheng ,
ZHANG Xiaoming ,
WANG Jiang ,
ZOU Huawei ,
JIANG Xingde ,
WU Dan

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1. Animal Nutrition Institute of Sichuan Agricultural University, Ya'an 625014, China;
2. Chongqing Hengdu Agriculture Group Co., Ltd., Fengdu 408200, China

Received date: 2015-11-17

Online published: 2016-05-24

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Abstract

This experiment was conducted to investigate the energy metabolism and requirement of growing Qinchuan cattle. Thirty healthy growing bulls of Qinchuan cattle with similar body weight[(336.33±18.28) kg] were selected and randomly divided into 5 groups with 6 heads in each group. Cattle were fed 5 diets with different levels of energy, which were formulated according to 85.0% (group Ⅰ), 92.5% (group Ⅱ), 100.0% (group Ⅲ), 107.5% (group Ⅳ) and 115.0% (group Ⅴ) of net energy for the expected weight gain of 900 g/d[China Feeding Stantard of Beef Cattle(NY/T 815-2004)], respectively. Feeding test and digestion and metabolism test were carried out to measure the growth performance and energy metabolism indexes of growing Qinchuan cattle, and to build the models for predicting the digestive energy requirement and energy metabolism requirement. Pre-test period was 10 days and test period was 42 days. The results showed as follows:average daily gain of group Ⅲ (880.15 g/d) was lower than the expected result; the average daily gain (1160.10 g/d) and energy utilization efficiency of group Ⅳ were maximum; the average values of gross energy digestibility, gross energy metabolic rate and digestive energy metabolic rate were (76.44±3.23)%, (66.75±3.16)% and (87.31±0.54)%, respectively; the digestive energy requirement and metabolizable energy requirement of growing Qinchuan cattle could be estimated by the following equations:DER=0.778W^0.75 +37.05ADG; MER=0.668W^0.75+33.49ADG[DER represented digestive energy requirement (MJ/d), MER represented metabolizable energy requirement (MJ/d), W^0.75 represented metabolic body weight (kg), and ADG represented average daily gain (kg/d)]. Overall, the digestive energy requirement and metabolizable energy requirement for maintenance of growing Qinchuan cattle are 0.778 and 0.668 MJ/(kg W^0.75·d), respectively. Digestible energy and metabolizable energy required for per kilogram of body weight gain are 37.05 and 33.49 MJ, respectively.

Key words： Qinchuan cattle; digestive energy; metabolizable energy; requirement

Cite this article

CHEN Yan , WANG Zhisheng , ZHANG Xiaoming , WANG Jiang , ZOU Huawei , JIANG Xingde , WU Dan . Energy Metabolism and Requirement of Growing Qinchuan Cattle[J]. Chinese Journal of Animal Nutrition, 2016 , 28(5) : 1573 -1580 . DOI: 10.3969/j.issn.1006-267x.2016.05.035

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