Vonnahme Kimberly A, Neville Tammi L, Lekatz Leslie A, Reynolds Lawrence P, Hammer Carolyn J, Redmer Dale A, Caton Joel S
Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA.
Nutr Metab Insights. 2013 Apr 17;6:11-21. doi: 10.4137/NMI.S11332. Print 2013.
To determine the effects of maternal supranutritional selenium (Se) supplementation and maternal nutritional plane on offspring growth potential, ewes were randomly assigned to 1 of 6 treatments in a 2 × 3 factorial arrangement [dietary Se (adequate Se; 9.5 μg/kg body weight vs. high Se; 81.8 μg/kg body weight initiated at breeding) and plane of nutrition [60%, 100%, or 140% of requirements; initiated on day 50 of gestation]]. Lambs were immediately removed from dams at birth and reared. Cortisol concentrations at birth were similar, but by 24 h, a relationship (P = 0.02) between maternal Se supplementation and nutritional plane on cortisol concentrations was observed in lambs. A sex of offspring × day of age interaction (P = 0.01) and a maternal Se supplementation × nutritional plane × day of age interaction (P = 0.04) was observed for thyroxine concentrations. Differences in growth may be influenced by thyroid hormone production early in neonatal life.
为了确定母羊超营养水平补充硒（Se）以及母羊营养水平对后代生长潜力的影响，将母羊按照2×3析因设计随机分为6种处理之一[日粮硒（充足硒；繁殖时开始为9.5μg/kg体重，高硒；繁殖时开始为81.8μg/kg体重）和营养水平[需求量的60%、100%或140%；妊娠第50天开始]]。羔羊出生时立即与母羊分离并进行饲养。出生时皮质醇浓度相似，但到24小时时，观察到母羊补充硒和营养水平与羔羊皮质醇浓度之间存在关系（P = 0.02）。观察到甲状腺素浓度存在后代性别×日龄交互作用（P = 0.01）以及母羊补充硒×营养水平×日龄交互作用（P = 0.04）。生长差异可能受新生期早期甲状腺激素产生的影响。
