Pre-Exposure of Early-Weaned Lambs to a Herb-Clover Mix Does Not Improve Their Subsequent Growth
Pre-Exposure of Early-Weaned Lambs to a Herb-Clover Mix Does Not Improve Their Subsequent Growth
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DOI：
10.3390/ani10081354
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发表时间：
2020-08-01
期刊：
影响因子：
3
通讯作者：
Pain, Sarah Jean
中科院分区：
文献类型：
--
作者：
Ekanayake, Lukshman Jay;Corner-Thomas, Rene Anne;Pain, Sarah Jean
简单总结：羔羊断奶前暴露于以草本植物为基础的饮食可能会促进瘤胃的发育，这可能会随后增加早期断奶后的动物性能。本研究的目的是估计不同的持续时间的羔羊暴露于草药-三叶草混合物含有菊苣，车前草，红三叶草，白色三叶草早期断奶（在类似的45天的年龄）对他们随后的生长和瘤胃发育在常规断奶年龄的影响。羔羊在早期断奶前长时间暴露于草-三叶草混合物对羔羊生长或瘤胃发育没有影响，这表明使用这种管理选项不会改善羔羊早期断奶后的性能。（1）在以黑麦草-三叶草为基础的牧场上出生和管理的羔羊，直到约99日龄常规断奶（草-草（CW））;（2）在以黑麦草-三叶草为基础的牧场上出生的羔羊，在近似45日龄时早期断奶到草-三叶草混合物上（草-草（EW））;（3）在以黑麦草-三叶草为主的牧场上出生的羔羊，在接近45日龄时，将其与母鼠一起转移到草药-三叶草混合物上，直到常规断奶（草-草（CW））;（4）在以黑麦草-三叶草为主的牧场上出生的羔羊，在近似15日龄时与它们的母鼠一起转移到草本-三叶草混合物上，并且在近似45日龄时早期断奶到草本-三叶草混合物上（草-草（D15 EW））;（5）在草-三叶草混合物上出生和管理直到常规断奶的羔羊（草-草（CW））;（6）在草-三叶草混合物上出生并在近似45日龄时早期断奶到草-三叶草混合物上的羔羊（草-草（EW））。在这两年中，草药（CW）羔羊有更大的（p< 0.05）比羔羊在其他治疗的增长率。草-草（EW）、草-草（D15 EW）和草-草（EW）羔羊的增重和瘤胃乳头发育差异不显著（p> 0.05）。早期断奶和常规断奶时的空消化道重量在处理组之间没有差异（p> 0.05）。暴露早期断奶羔羊的草药混合物的时间较长，早期断奶之前，不会改善其随后的增长。
Simple Summary: Exposure of lambs to herbage-based diets prior to weaning may facilitate the development of the rumen which may subsequently increase animal performance after early weaning. The aim of this study was to estimate the effects of varying durations of exposure of lambs to a herb-clover mix containing chicory, plantain, red clover, and white clover prior to early weaning (at similar to 45 days of age) on their subsequent growth and rumen development at conventional weaning age. Prolonged exposure of lambs to the herb-clover mix prior to early weaning had no impact on lamb growth or rumen development, suggesting that using this management option will not improve performance of lambs after early weaning.Twin sets of lambs were randomly allocated to one of six treatments: (1) lambs born and managed on ryegrass-clover-based pasture until conventional weaning approximately at 99 days of age (Grass-Grass(CW)); (2) lambs born on ryegrass-clover-based pasture and early weaned onto a herb-clover mix at similar to 45 days of age (Grass-Herb(EW)); (3) lambs born on ryegrass-clover-based pasture, transferred with their dam onto a herb-clover mix at similar to 45 days of age until conventional weaning (Grass-Herb(CW)); (4) lambs born on ryegrass-clover-based pasture, transferred with their dam onto a herb-clover mix at similar to 15 days of age and early weaned onto a herb-clover mix at similar to 45 days of age (Grass-Herb(D15EW)); (5) lambs born and managed on herb-clover mix until conventional weaning (Herb-Herb(CW)); (6) lambs born on herb-clover mix and weaned early onto a herb-clover mix at similar to 45 days of age (Herb-Herb(EW)). In both years, Herb-Herb(CW) lambs had greater (p< 0.05) growth rates than lambs in other treatments. The liveweight gains and rumen papillae development of Herb-Herb(EW), Grass-Herb(D15EW) and Grass-Herb(EW) lambs did not differ (p> 0.05). The weight of the empty digestive tract components at either early weaning or conventional weaning did not differ (p> 0.05) between treatments. Exposing early-weaned lambs to the herb mix for a prolonged period, prior to early weaning, does not improve their subsequent growth.