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首页> 美国卫生研究院文献>Journal of Animal Science >Effects of maternal nutrition and rumen-protected arginine supplementation on ewe performance and postnatal lamb growth and internal organ mass
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Effects of maternal nutrition and rumen-protected arginine supplementation on ewe performance and postnatal lamb growth and internal organ mass

机译：孕妇营养和瘤胃保护精氨酸补充对母羊生产性能和产后羔羊生长及内脏器官质量的影响

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The hypothesis of this study was that arginine supplementation would overcome negative effects of restricted maternal feed intake during the last two-thirds of gestation on ewe performance and positively affect postnatal lamb growth and development. Multiparous, Rambouillet ewes (n = 32) were allocated to 3 treatments in a completely random design at 54 ± 3.9 d of gestation. Dietary treatments were 100% of nutrient requirements (control, >CON), 60% of control (restricted, >RES), or RES plus a rumen-protected arginine supplement dosed at 180 mg/kg BW once daily (>RES-ARG). Ewes were penned individually in a temperature-controlled facility. At parturition, lambs were immediately removed from dams and reared independently. At day 54 ± 3 of age, lambs were stunned using captive bolt, exsanguinated, and organs were collected and weighed. Ewe BW from day 68 of gestation through parturition was greater (P ≤ 0.03) in CON compared with RES or RES-ARG. Similarly, ewe BCS from day 68 of gestation through parturition was greater (P ≤ 0.03) in CON than either RES or RES-ARG. Total ewe colostrum mass (g) at 3 h after parturition was greater (P ≤ 0.001) in CON than RES or RES-ARG. Lamb birth weight was greater (P = 0.04) in CON than RES ewes and tended (P = 0.10) to be greater in CON vs. RES-ARG. Lambs born to CON ewes had greater (P ≤ 0.03) BW than lambs from RES ewes at 7, 14, and 33 d postpartum. On day 19, lambs from CON and RES-ARG ewes both had greater (P ≤ 0.04) BW than lambs from RES ewes (12.0 and 11.5 vs. 10.3 ± 0.41 kg, respectively). Lambs born to CON and RES-ARG ewes had greater (P ≤ 0.04) ADG than lambs from RES ewes on day 19 (355.0 and 354.0 vs. 306.4 ± 15.77 g, respectively). Lambs from CON and RES-ARG ewes also had greater (P ≤ 0.02) girth circumference than lambs from RES ewes on day 19 (55.4 and 54.6 vs. 51.3 ± 0.97 cm, respectively). On day 54, lambs from RES-ARG ewes had greater (P = 0.003) curved crown rump length than lambs from RES ewes (99.8 vs. 93.9 ± 1.28 cm, respectively). Adrenal glands in lambs from CON dams had greater (P = 0.01) mass than adrenal glands in lambs from RES dams. Livers from lambs born to RES-ARG ewes weighed more (P = 0.05) than livers from lambs born to RES ewes. These results confirm our hypothesis that arginine supplementation during the last two-thirds of gestation can mitigate offspring, but not maternal negative consequences associated with restricted maternal nutrition.
机译：这项研究的假设是，在妊娠的最后三分之二期间，补充精氨酸将克服母体采食量受限对母羊生产的负面影响，并积极影响产后羔羊的生长和发育。在妊娠54±3.9 d时，将完全随机设计的多头Rambouillet母羊（n = 32）分配给3种治疗。饮食治疗是营养需求的100％（对照，> CON ），对照的60％（受限，> RES ）或RES加瘤胃保护的精氨酸补充剂，剂量为180每天一次mg / kg体重（> RES-ARG ）。母羊在温度受控的设施中单独悬挂。分娩时，羊羔立即从大坝中移出并独立饲养。在第54±3日龄，用栓子将小羊击昏，放血，收集器官并称重。与RES或RES-ARG相比，从妊娠第68天到分娩的母羊体重在CON中更大（P≤0.03）。同样，从妊娠第68天到分娩的母羊BCS的CON值大于RES或RES-ARG（P≤0.03）。分娩后3 h，CON中的母羊初乳总质量（g）大于RES或RES-ARG（P≤0.001）。 CON中的羔羊出生体重大于RES母羊（P = 0.04），而CON与RES-ARG相比则倾向于（P = 0.10）更大。在产后第7、14和33天，CON母羊出生的羔羊的体重（P≤0.03）大于RES母羊的体重。在第19天，CON和RES-ARG母羊的体重都比RES母羊的体重高（P≤0.04）（分别为12.0和11.5对10.3±0.41千克）。第19天，CON和RES-ARG母羊出生的羔羊的ADG比RES母羊的羔羊高（P≤0.04）（分别为355.0和354.0 vs. 306.4±15.77 g）。第19天，CON和RES-ARG母羊的围围也比RES母羊的围围大（P≤0.02）（分别为55.4和54.6对51.3±0.97 cm）。在第54天，RES-ARG母羊的羔羊弯曲冠臀长（P = 0.003）比RES母羊的羔羊（分别为99.8和93.9±1.28 cm）更大。 CON水坝的羔羊的肾上腺比RES水坝的羔羊的肾上腺质量大（P = 0.01）。 RES-ARG母羊出生的羔羊的肝脏比RES母羊出生的羔羊的肝脏重（P = 0.05）。这些结果证实了我们的假设，即在妊娠的后三分之二期间补充精氨酸可以减轻后代的负担，但不能减轻与母亲营养受限相关的母亲负面后果。

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