Net Energy Requirement of Male Minks during Growing Period

HAN Feifei; ZHONG Wei; ZHANG Xinyu; MU Linlin; CHEN Shuangshuang; WANG Zhuo; LIU Keyuan; WANG Jing; LI Guangyu

doi:10.3969/j.issn.1006-267x.2020.11.043

Chinese Journal of Animal Nutrition >

2020 , Vol. 32 >Issue 11: 5373 - 5379

DOI: https://doi.org/10.3969/j.issn.1006-267x.2020.11.043

Net Energy Requirement of Male Minks during Growing Period

HAN Feifei ,
ZHONG Wei ,
ZHANG Xinyu ,
MU Linlin ,
CHEN Shuangshuang ,
WANG Zhuo ,
LIU Keyuan ,
WANG Jing ,
LI Guangyu

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State Key Laboratory of Special Economic Animal Molecular Biology, Institute of Economic Animal and Plant Science, Chinese Academy of Agriculture Sciences, Changchun 130112, China

Received date: 2020-04-27

Online published: 2020-11-16

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Abstract

This experiment was adopted open circuit respiratory calorimetry with 6 chambers in parallel for fur animal to detect and calculate the net energy for growth (NE_g) and net energy for maintenance (NE_m) requirement of male minks during growing period, and to improve nutrient standards of mink industry in China. Twenty-four healthy male minks with similar age were selected for the respiratory calorimetry test. There were 3 stages in the test, 7 d for each stage, including 1 d for adaptation, 3 d for normal metabolism, and 3 d for fasting metabolism, and 3 replicates for each stage, 3 minks of one replicate were put into the same one respiration chambers. The results showed as follows: 1) the metabolizable energy intake (MEI) was 1 296.51 kJ/(kg BW^0.75·d),heat production (HP) was 530.03 kJ/(kg BW^0.75·d),net energy for growth (NE_g) was 766.92 kJ/(kg BW^0.75·d) during balance trail. The fasting heat production (FHP) was 414.87 kJ/(kg BW^0.75·d), the total net energy (NE) requirement was 1 181.79 kJ/(kg BW^0.75·d). 2) The O₂ consumption was 26.70 L/(kg BW^0.75·d), the CO₂ production was 20.51 L/(kg BW^0.75·d), and the respiratory quotient (RQ) was 0.78 during balance trail. The O₂ consumption was 20.91 L/(kg BW^0.75·d), the CO₂ production was 15.65 L/(kg BW^0.75·d), and the RQ was 0.76 during fast period. 3) The metabolizable energy for maintenance (ME_m) and NE_m estimated from the linear relationship between RE and MEI were 518.47 and 436.00 kJ/(kg BW^0.75·d), respectively. The ME_m and NE_m estimated by logarithmic regression of HP on MEI were 529.00 and 467.98 kJ/(kg BW^0.75·d), respectively. In conclusion, the energy requirements of the male minks at the growing stage of 1.30 to 2.58 kg are: ME_m 518.00 to 529.00 kJ/(kg BW^0.75·d), NE_m 414.87 to 467.98 kJ/(kg BW^0.75·d), NE_g 766.92 kJ/(kg BW^0.75·d), NE 1 181.79 kJ/(kg BW^0.75·d), respectively.

Key words： mink; growing period; energy balance; respiratory metabolism; energy requirement

Cite this article

HAN Feifei , ZHONG Wei , ZHANG Xinyu , MU Linlin , CHEN Shuangshuang , WANG Zhuo , LIU Keyuan , WANG Jing , LI Guangyu . Net Energy Requirement of Male Minks during Growing Period[J]. Chinese Journal of Animal Nutrition, 2020 , 32(11) : 5373 -5379 . DOI: 10.3969/j.issn.1006-267x.2020.11.043

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