Stewart W C, Whitney T R, Scholljegerdes E J, Hallford D M, Walker J W, Adams R P, Naumann H D
J Anim Sci. 2017 Sep;95(9):4113-4123. doi: 10.2527/jas2016.1090.
The objective of this research was to evaluate effects of replacing sorghum × Sudangrass hay with ground juniper in gestating ewe supplements on pre- and postpartum growth performance, serum metabolites and hormonal concentrations, milk fatty acid composition, and progeny preweaning performance. In a completely randomized design, commercial Rambouillet ewes (age = 3 to 5 yr; initial BW = 65.2 ± 1.6 kg) on a base diet of long-stem sorghum × Sudangrass hay were assigned to 1 of 4 dietary supplements in which ground juniper replaced 0% (CNTL), 33% (18JUN), 66% (36JUN), or 100% (54JUN) of the ground sorghum × Sudangrass hay in a pelleted supplement with ground juniper from d 38 ± 4 of gestation to 2 d postpartum. Treatment DM diet intake overall (g/kg BW) in ewes receiving no juniper was similar ( ≥ 0.38) to that of those receiving increasing concentrations of juniper. Changes in ewe BW and BCS were similar ( ≥ 0.24) in ewes throughout gestation. All serum metabolites and hormones were within normal clinical ranges; however, serum IGF-1 decreased linearly ( = 0.003), alanine increased (linear; = 0.003), and serum Na decreased (linear; = 0.049) as the percentage of juniper increased in the diet. Ewe milk fatty acid composition was similar ( > 0.05) for the majority of fatty acids across treatment groups, with the exception of arachidonic acid (C20:4n6) being greater ( < 0.02) in 54JUN vs. CNTL ewe milk. Lamb birth weights were similar ( = 0.13), whereas lamb ADG tended to differ (quadratic; = 0.06) from d 0 to 14, with 18JUN being the least. At weaning, BW tended ( = 0.09) to linearly decrease in lambs born to ewes consuming greater concentrations of juniper but were not different ( = 0.26) between CNTL and 18JUN, 36JUN, and 54JUN. Results indicated that feeding increasing levels of ground juniper in supplements did not negatively alter ewe performance or serum metabolites and hormones measured pre- and postpartum. Lamb birth weight and preweaning performance appeared unaffected by maternal consumption of ground juniper containing supplements. Results also provide novel information regarding the effects of plant secondary compound consumption throughout pregnancy on ewe and progeny performance and health.
本研究的目的是评估在妊娠母羊补充料中用杜松子粉替代高粱×苏丹草干草对产前和产后生长性能、血清代谢物和激素浓度、乳脂肪酸组成以及后代断奶前性能的影响。在完全随机设计中，将以长茎高粱×苏丹草干草为基础日粮的商业兰布耶母羊（年龄 = 3至5岁；初始体重 = 65.2±1.6千克）分配到4种日粮补充料中的1种，其中从妊娠38±4天至产后2天，在颗粒状补充料中用杜松子粉替代0%（对照）、33%（18JUN）、66%（36JUN）或100%（54JUN）的高粱×苏丹草干草粉。未添加杜松子的母羊的总体干物质采食量（克/千克体重）与添加杜松子浓度增加的母羊相似（≥0.38）。整个妊娠期母羊的体重和体况评分变化相似（≥0.24）。所有血清代谢物和激素均在正常临床范围内；然而，随着日粮中杜松子百分比的增加，血清胰岛素样生长因子-1呈线性下降（P = 0.003），丙氨酸增加（线性；P = 0.003），血清钠下降（线性；P = 0.049）。除了花生四烯酸（C20:4n6）在54JUN组母羊乳汁中的含量高于对照（P < 0.02）外，各处理组大多数脂肪酸的母羊乳脂肪酸组成相似（P > 0.05）。羔羊出生体重相似（P = 0.13），而从出生到14日龄羔羊的平均日增重有差异趋势（二次方；P = 0.06），18JUN组最低。断奶时，采食较高浓度杜松子的母羊所生羔羊的体重有线性下降趋势（P = 0.09），但对照与18JUN、36JUN和54JUN组之间无差异（P = 0.26）。结果表明，在补充料中增加杜松子粉的饲喂量不会对母羊的性能或产前和产后测定的血清代谢物及激素产生负面影响。羔羊出生体重和断奶前性能似乎不受母羊采食含杜松子补充料的影响。研究结果还提供了关于整个妊娠期食用植物次生化合物对母羊及其后代性能和健康影响的新信息。
