Focused nutrition during oestrus synchronization in Pelibuey ewes with different body conditions

IF 0.7 4区农林科学 Q3 AGRICULTURE, DAIRY & ANIMAL SCIENCE

South African Journal of Animal Science Pub Date : 2023-04-17 DOI:10.4314/sajas.v52i4.09

J. A. Hernández-Marín, P. Pérez-Hernández, C. Cortez-Romero, A. Pro-Martínez, J. Gallegos-Sánchez

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引用次数: 0

Abstract

The aim of this study was to evaluate ovarian follicular activity, ovulation percentage, and body weight change in response to focused nutrition during synchronization of oestrus with an intravaginal device (CIDR®) (9 days) in Pelibuey ewes with high and low body condition. Seventy-two non-pregnant ewes without offspring were randomly distributed to one of four treatments, namely T1: (n = 18) ewes without focused nutrition and low body condition; T2: (n = 18) ewes without focused nutrition and high body condition; T3: (n = 18) ewes with focused nutrition and low body condition; and T4: (n = 18) ewes with focused nutrition and high body condition. While the CIDR device was in place, the ewes with focused nutrition received a supplement of 1.5 kg ewe/day, which contained 2.9 MCal metabolizable energy, 16% crude protein, 88.5% dry matter, 11.8% crude fibre, and 6.7% of ash. The concentration of progesterone (P4) was measured to determine ovulation percentage. The follicular population was quantified (2–3 mm, 4–5 mm, and >6 mm in diameter). The number of follicles between 2–3 mm and 4–5 mm in diameter was similar among treatments. The number of follicles >6 mm in diameter was higher in T4 ewes (2.2 ± 0.2) compared with T1, T2, and T3. The response to oestrus, the onset of oestrus, and the ovulation percentage were similar among treatments. Focused nutrition increased the number of ovarian follicles >6 mm in diameter in ewes with high body condition.

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不同体质佩利布伊母羊发情同步期间的重点营养

本研究的目的是通过阴道内装置(CIDR®)(9天)评估Pelibuey母羊在高体况和低体况的同步发情期间，对重点营养的反应，卵巢卵泡活性、排卵率和体重变化。将72只未怀孕、无子代的母羊随机分为4组，即T1组:(n = 18)母羊营养不集中、体况不佳;T2: (n = 18)没有集中营养和高体况的母羊;T3: 18只母羊，营养集中，体况较低;T4组18只母羊，营养集中，体质良好。在CIDR装置设置时，重点营养母羊每天补充1.5 kg母羊，饲粮中MCal代谢能2.9，粗蛋白质16%，干物质88.5%，粗纤维11.8%，灰分6.7%。测定孕酮(P4)浓度，测定排卵百分率。对卵泡种群进行量化(2-3 mm、4-5 mm和6 - 6 mm直径)。2 ~ 3 mm和4 ~ 5 mm直径的卵泡数量在不同处理间相似。与T1、T2和T3母羊相比，T4母羊的卵泡数(2.2±0.2)高于T1、T2和T3母羊。不同治疗组对发情的反应、发情时间和排卵率相似。高体质母羊的卵巢卵泡直径为60 ~ 6mm，集中营养可增加卵泡数量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

South African Journal of Animal Science 农林科学-奶制品与动物科学

CiteScore

1.50

自引率

0.00%

发文量

审稿时长

>36 weeks

期刊介绍： The South African Journal of Animal Science is an open access, peer-reviewed journal for publication of original scientific articles and reviews in the field of animal science. The journal publishes reports of research dealing with production of farmed animal species (cattle, sheep, goats, pigs, horses, poultry and ostriches), as well as pertinent aspects of research on aquatic and wildlife species. Disciplines covered nutrition, genetics, physiology, and production systems. Systematic research on animal products, behaviour, and welfare are also invited. Rigorous testing of well-specified hypotheses is expected.