The effect of periodic energy restriction on growth performance, serum biochemical indices, and meat quality in sheep
The effect of periodic energy restriction on growth performance, serum biochemical indices, and meat quality in sheep
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DOI：
10.1093/jas/sky299
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发表时间：
2018-10-01
影响因子：
3.3
通讯作者：
Liu, Lishan
中科院分区：
文献类型：
--
作者：
Song, Shuzhen;Wu, Jianping;Liu, Lishan
能量是神经内分泌系统调节的关键因素。为了模拟西北天然草原季节变化，比较饲粮限制代谢能（ME）的羔羊的生长性能、血清生化指标、胴体性状、肉品质和营养成分。选取19只杜泊小尾寒公羊，分别饲喂1.0 MJ/W-0.75 × d（-1）的对照组（CON）和每30 d依次限制代谢能(0.56、0.84、1.0、0.84、0.56和0.28 MJ/W-0.75 × d（-1）的限能组（RES）。在研究结束时，羔羊被收获。CON组羔羊的平均日增重（ADG）高于resf组（CON组158.79 g/d， RES组57.01 g/d） （P < 0.05），但各期平均日增重均较resf组低，后期ADG为负，导致羔羊体重下降。两种处理在最后3个研究期间的平均日增重均低于前2个研究期间，这可能是由于冷应激(
Energy is a key factor regulated by the neuroendocrine system. The objective of this study was to compare growth performance, serum biochemical indices, carcass traits, meat quality, and nutrient composition of lambs fed restricted metabolizable energy (ME) intakes to mimic the seasonal changes of the natural grasslands of northwest China. Nineteen male Dorper x Small Tailed Han lambs were assigned to treatments, control (CON) fed at 1.0 MJ/W-0.75 x d(-1) throughout the 180 d study, and restricted ME (RES) fed by sequentially restricting ME every 30 d (0.56, 0.84, 1.0, 0.84, 0.56, and 0.28 MJ/W-0.75 x d(-1)). Lambs were harvested at the end of the study. Lambs fed the CON diet demonstrated higher (P < 0.05) average daily gain (ADG) compared with RESfed lambs (158.79 and 57.01 g/d, for CON and RES, respectively), although ADG were lower in each period with the last period being a negative ADG for RES-fed lambs resulting in a loss of body weight. Both treatments demonstrated lower ADG in the last 3 study periods compared with the first 2 periods, which may be explained by cold stress (