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Effect of feed efficiency on growth performance, body composition, and fat deposition in growing Hu lambs
Animal Biotechnology ( IF 3.7 ) Pub Date : 2021-08-04 , DOI: 10.1080/10495398.2021.1951747
Xiaoxue Zhang 1 , Guoze Li 1 , Fadi Li 2 , Deyin Zhang 1 , Lvfeng Yuan 1 , Yuan Zhao 1 , Yukun Zhang 1 , Xiaolong Li 1 , Qizhi Song 1 , Weimin Wang 1
Affiliation  

Abstract

The present study aimed to investigate the relationship between growth performance, body composition, and fat deposition factors, and feed efficiency in growing lambs. We measured average daily feed intake (ADFI) and body weight (BW) from 653 Hu sheep that were fed a pellet diet. The residual feed intake (RFI) not significantly genetic and phenotypic correlated with the metabolic body weight (MBW) and average daily gain (ADG), but it was significantly genetic and phenotypic correlated with ADFI and the feed conversion ratio (FCR) (p < 0.01). However, the FCR was significantly associated with growth traits (p < 0.01). With the same ADG, body fat deposition was greater in animals with low feed efficiency compared with high feed efficiency. Therefore, excessive fat deposition can affect the feed efficiency of the body, and organ weight and gut-weight have a greater impact on the feed efficiency of lambs. The reticulum stomach and jejunum of lambs with a low RFI were smaller compared with that in the high RFI, indicating that lambs with a low RFI have less intake and a higher absorption rate. Small organs, such as the liver, of lambs with high FE might be associated with low energy expenditure and slow metabolism. This study provides a new perspective to study the biological processes responsible for feed efficiency variation in lambs.



中文翻译:

饲料效率对生长中胡羊生长性能、体成分和脂肪沉积的影响

摘要

本研究旨在调查生长性能、身体成分和脂肪沉积因素与生长羔羊的饲料效率之间的关系。我们测量了 653 只饲喂颗粒饲料的湖羊的平均每日采食量 (ADFI) 和体重 (BW)。剩余采食量(RFI)与代谢体重(MBW)和平均日增重(ADG)无显着遗传和表型相关,但与ADFI和饲料转化率(FCR)显着遗传和表型相关(p  < 0.01)。然而,FCR 与生长性状显着相关(p < 0.01)。在日增重相同的情况下,与高饲料效率相比,饲料效率低的动物体内脂肪沉积更多。因此,脂肪沉积过多会影响机体的饲料效率,而脏器重和肠重对羔羊的饲料效率影响较大。低RFI羔羊的网胃和空肠比高RFI羔羊小,说明低RFI羔羊采食量少,吸收率高。具有高 FE 的羔羊的小器官,如肝脏,可能与低能量消耗和缓慢的新陈代谢有关。本研究为研究造成羔羊饲料效率变化的生物学过程提供了新的视角。

更新日期:2021-08-04
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