Alterations in nutrient digestion and utilization associated with different residual feed intake in Hu sheep

Alterations in nutrient digestion and utilization associated with different residual feed intake in Hu sheep

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Hongbo Zeng^a^,^b, Yuyang Yin^d, Lingxi Chen^a^,^b, Zhuoxin Xu^a^,^b, Yang Luo^e, Qian Wang^a^,^b, Bin Yang^a^,^c^,^*, Jiakun Wang^a^,^b^,^*

Animal Nutrition | 2023, 13(1) : 334 - 341

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Animal Nutrition | 2023, 13(1): 334-341

• Original Research Article •

Alterations in nutrient digestion and utilization associated with different residual feed intake in Hu sheep

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Hongbo Zeng^a^,^b, Yuyang Yin^d, Lingxi Chen^a^,^b, Zhuoxin Xu^a^,^b, Yang Luo^e, Qian Wang^a^,^b, Bin Yang^a^,^c^,^*, Jiakun Wang^a^,^b^,^*

Affiliations

^aInstitute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou, 310058, China

^bMoE Key Laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou, 310058, China

^cSchool of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou, 310023, Zhejiang, China

^dHuzhou Academy of Agricultural Sciences, Huzhou, 313000, China

^eHunan Institute of Animal and Veterinary Science, Changsha, 410131, China

Published: 2023-06-10 doi: 10.1016/j.aninu.2023.02.009

Outline

Abstract

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Improving feed efficiency is crucial to the animal industry. Residual feed intake (RFI) is now regarded as an index of feed efficiency evaluation and is independent of growth characteristics. Our study aims to explore the alterations in growth performance and nutrient digestion in Hu sheep with different RFI phenotypes. Sixty-four male Hu sheep (body weight = 24.39 ± 1.12 kg; postnatal days = 90 ± 7.9) were selected for the study. After an evaluation period of 56 days and power analysis, samples were collected from 14 low RFI (L-RFI group, power = 0.95) and 14 high RFI sheep (H-RFI group, power = 0.95). The L-RFI sheep yielded a lower (P < 0.05) feed conversion ratio and dry matter intake; however, both groups exhibited similar average daily gain (P > 0.05). The acid detergent fiber, neutral detergent fiber, organic matter, and crude protein apparent digestibility were higher (P < 0.05) in L-RFI sheep. N intake and fecal N output (% of N intake) were lower (P < 0.05) and N retention (% of N intake) was higher (P < 0.05) in L-RFI sheep, whereas no difference (P > 0.05) was found in urine N output (% of N intake) between the 2 groups. Furthermore, L-RFI sheep gave lower (P < 0.05) serum glucose concentrations and higher (P < 0.05) non-esterified fatty acid concentrations. Meanwhile, a lower ruminal acetate molar proportion (P < 0.05) and higher propionate molar proportion (P < 0.05) were observed in L-RFI sheep. In summary, these results revealed that despite having lower dry matter intake, L-RFI sheep possess higher nutrient digestibility, N retention, ruminal propionate production and serum glucose utilization, in order to meet energy demands. Selection for low RFI sheep could reduce feed costs, which in turn provides economic benefits to the sheep industry.

Key words

Residual feed intake / Growth performance / Apparent digestibility / Nitrogen metabolism / Rumen fermentation / Sheep

Cite this Article

Hongbo Zeng, Yuyang Yin, Lingxi Chen, Zhuoxin Xu, Yang Luo, Qian Wang, Bin Yang, Jiakun Wang. Alterations in nutrient digestion and utilization associated with different residual feed intake in Hu sheep[J]. Animal Nutrition, 2023 , 13 (1) : 334 -341 . DOI: 10.1016/j.aninu.2023.02.009

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Year 2023 volume 13 Issue 1

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Article Info

doi: 10.1016/j.aninu.2023.02.009

Receive Date：2022-04-21
Online Date：2026-02-03
Published：2023-06-10

Article Data

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History

Received：2022-04-21
Revised：2023-01-14
Accepted：2023-02-25

Affiliations

^aInstitute of Dairy Science, College of Animal Sciences, Zhejiang University, Hangzhou, 310058, China

^bMoE Key Laboratory of Molecular Animal Nutrition, Zhejiang University, Hangzhou, 310058, China

^cSchool of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou, 310023, Zhejiang, China

^dHuzhou Academy of Agricultural Sciences, Huzhou, 313000, China

^eHunan Institute of Animal and Veterinary Science, Changsha, 410131, China

Corresponding:

^* Corresponding authors. E-mail addresses: binyang@zju.edu.cn (B. Yang)

jiakunwang@zju.edu.cn (J. Wang).

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表12种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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