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Net micromineral requirements for maintenance and growth of ewe lambs at the latter fattening period
OBJECTIVE: The objective of this study was to investigate the net micromineral (Cu, Fe, Mn, Zn) requirements for maintenance and growth of Dorper×Jinzhong crossbred ewe lambs at their latter fattening period. METHODS: Thirty 1/2 Dorper × 1/2 Jinzhong crossed F1 ewe lambs (35±0.5 kg of body weight [B...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Asian-Australasian Association of Animal Production Societies (AAAP) and Korean Society of Animal Science and Technology (KSAST)
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7468177/ https://www.ncbi.nlm.nih.gov/pubmed/32054183 http://dx.doi.org/10.5713/ajas.19.0390 |
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author | Jin, Ya Qian Ding, Na Diao, Xiao Gao Yu, Sheng Chen Zhao, Jun Xing Zhang, Jian Xin |
author_facet | Jin, Ya Qian Ding, Na Diao, Xiao Gao Yu, Sheng Chen Zhao, Jun Xing Zhang, Jian Xin |
author_sort | Jin, Ya Qian |
collection | PubMed |
description | OBJECTIVE: The objective of this study was to investigate the net micromineral (Cu, Fe, Mn, Zn) requirements for maintenance and growth of Dorper×Jinzhong crossbred ewe lambs at their latter fattening period. METHODS: Thirty 1/2 Dorper × 1/2 Jinzhong crossed F1 ewe lambs (35±0.5 kg of body weight [BW]) were used and divided into five groups in a randomized design for a comparative slaughter trial. At the beginning of the experiment, six lambs were randomly selected and slaughtered at 35 kg BW to determine their initial body composition. When their BWs reached 43 kg, another six lambs fed ad libitum were slaughtered to serve as an intermediate slaughter group. The retained eighteen lambs were randomly distributed into three groups and offered one type of feed at 100%, 65%, and 40% of the ad libitum intake. When the lambs fed ad libitum reached a BW of 50 kg, the three groups were slaughtered. The body composition (muscle, fat, bone, blood with viscera, skin, and wool) were weighted, ground, mixed, and subsampled for mineral content analysis. RESULTS: The net maintenance requirements of Cu, Fe, Mn, and Zn were 0.017, 0.160, 0.004, and 0.067 mg/kg BW/d, respectively, and the net growth requirements per 100 grams of average daily gain ranged from 0.48 to 0.51 mg of Cu, 2.63 to 2.17 mg of Fe, 0.12 to 0.15 mg of Mn, and 2.07 to 2.00 mg of Zn, respectively, for Dorper × Jinzhong crossed ewes from 35 to 50 kg BW. CONCLUSION: Our results suggest that the micromineral requirements for both maintenance and growth of Dorper × Jinzhong crossbred ewe lambs were quite different from the recommendations of NRC (2007), except for Zn. |
format | Online Article Text |
id | pubmed-7468177 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Asian-Australasian Association of Animal Production Societies (AAAP) and Korean Society of Animal Science and Technology (KSAST) |
record_format | MEDLINE/PubMed |
spelling | pubmed-74681772020-09-11 Net micromineral requirements for maintenance and growth of ewe lambs at the latter fattening period Jin, Ya Qian Ding, Na Diao, Xiao Gao Yu, Sheng Chen Zhao, Jun Xing Zhang, Jian Xin Asian-Australas J Anim Sci Article OBJECTIVE: The objective of this study was to investigate the net micromineral (Cu, Fe, Mn, Zn) requirements for maintenance and growth of Dorper×Jinzhong crossbred ewe lambs at their latter fattening period. METHODS: Thirty 1/2 Dorper × 1/2 Jinzhong crossed F1 ewe lambs (35±0.5 kg of body weight [BW]) were used and divided into five groups in a randomized design for a comparative slaughter trial. At the beginning of the experiment, six lambs were randomly selected and slaughtered at 35 kg BW to determine their initial body composition. When their BWs reached 43 kg, another six lambs fed ad libitum were slaughtered to serve as an intermediate slaughter group. The retained eighteen lambs were randomly distributed into three groups and offered one type of feed at 100%, 65%, and 40% of the ad libitum intake. When the lambs fed ad libitum reached a BW of 50 kg, the three groups were slaughtered. The body composition (muscle, fat, bone, blood with viscera, skin, and wool) were weighted, ground, mixed, and subsampled for mineral content analysis. RESULTS: The net maintenance requirements of Cu, Fe, Mn, and Zn were 0.017, 0.160, 0.004, and 0.067 mg/kg BW/d, respectively, and the net growth requirements per 100 grams of average daily gain ranged from 0.48 to 0.51 mg of Cu, 2.63 to 2.17 mg of Fe, 0.12 to 0.15 mg of Mn, and 2.07 to 2.00 mg of Zn, respectively, for Dorper × Jinzhong crossed ewes from 35 to 50 kg BW. CONCLUSION: Our results suggest that the micromineral requirements for both maintenance and growth of Dorper × Jinzhong crossbred ewe lambs were quite different from the recommendations of NRC (2007), except for Zn. Asian-Australasian Association of Animal Production Societies (AAAP) and Korean Society of Animal Science and Technology (KSAST) 2020-09 2019-12-24 /pmc/articles/PMC7468177/ /pubmed/32054183 http://dx.doi.org/10.5713/ajas.19.0390 Text en Copyright © 2020 by Asian-Australasian Journal of Animal Sciences This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Article Jin, Ya Qian Ding, Na Diao, Xiao Gao Yu, Sheng Chen Zhao, Jun Xing Zhang, Jian Xin Net micromineral requirements for maintenance and growth of ewe lambs at the latter fattening period |
title | Net micromineral requirements for maintenance and growth of ewe lambs at the latter fattening period |
title_full | Net micromineral requirements for maintenance and growth of ewe lambs at the latter fattening period |
title_fullStr | Net micromineral requirements for maintenance and growth of ewe lambs at the latter fattening period |
title_full_unstemmed | Net micromineral requirements for maintenance and growth of ewe lambs at the latter fattening period |
title_short | Net micromineral requirements for maintenance and growth of ewe lambs at the latter fattening period |
title_sort | net micromineral requirements for maintenance and growth of ewe lambs at the latter fattening period |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7468177/ https://www.ncbi.nlm.nih.gov/pubmed/32054183 http://dx.doi.org/10.5713/ajas.19.0390 |
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