Effect of feed efficiency on growth performance, body composition, and fat deposition in growing Hu lambs

残余进料口 饲料转化率 生物 动物科学 作文(语言) 体重增加 弹丸 体重 内分泌学 生态学 语言学 哲学
作者
Xiaoxue Zhang,Guoze Li,Fadi Li,Deyin Zhang,Lvfeng Yuan,Yuan Zhao,Yukun Zhang,Xiaolong Li,Qizhi Song,Weimin Wang
出处
期刊:Animal Biotechnology [Taylor & Francis]
卷期号:34 (2): 183-198 被引量:3
标识
DOI:10.1080/10495398.2021.1951747
摘要

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.
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