动物营养学报 >

2019 , Vol. 31 >Issue 2: 705 - 712

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.02.027

反刍与草食动物营养 Ruminant and herbivore nutrition

饲粮中添加铬对妊娠后期母羊繁殖性能及其子代羔羊生长发育的影响

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  • 西南民族大学生命科学与技术学院, 成都 610041
刘琪(1997-),女,湖北孝感人,本科生,动物营养专业。E-mail:1780102069@qq.com

收稿日期: 2018-07-26

  网络出版日期: 2019-02-18

基金资助

国家自然科学基金项目（31501977）；四川省国际合作计划项目（2015HH0018）；西南民族大学大学生创新创业项目（s201710656024）

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Effects of Dietary Chromium on Reproductive Performance of Ewes during Late Gestation and Growth and Development of Their Offspring

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  • College of Life Science and Technology, Southwest Minzu University, Chengdu 610041, China

Received date: 2018-07-26

  Online published: 2019-02-18

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摘要

本试验旨在研究饲粮中添加铬对妊娠后期母羊繁殖性能及其子代羔羊生长发育的影响。选用胎次（2胎）相同、体重[（52.36±8.24）kg]相近的处于妊娠（90±4）d的乐至黑山羊母羊40只，预饲7 d后，随机分为4组，每组10个重复，每个重复1只羊，单栏单饲。4组母羊分别饲喂在基础饲粮（铬含量为0.39 mg/kg DM）中添加0（对照）、0.4、1.2和2.0 mg/kg DM铬（铬源于丙酸铬）的试验饲粮。待母羊产仔后，调整羔羊数量使每只母羊所带羔羊数相等，进行母乳饲养至羔羊21日龄，试验期共81 d。结果显示：1）在妊娠后期母羊饲粮中添加不同水平的铬对妊娠后期和产后1~21 d母羊的干物质采食量（DMI）以及子代羔羊的生长性能均没有显著影响（P>0.05）。2）在妊娠后期母羊饲粮中添加不同水平的铬对妊娠120 d母羊血清促黄体素（LH）和雌二醇（E2）含量没有显著影响（P>0.05），但是可以线性提高妊娠120 d母羊血清孕酮（P4）含量（P=0.016 2），且血清促卵泡素（FSH）含量随铬添加水平的升高呈现先升高再降低的二次曲线变化趋势（P=0.050 4），在铬添加水平为0.4 mg/kg DM时有最大值。3）在妊娠后期母羊饲粮中添加不同水平的铬可以线性提高21日龄子代羔羊的肾脏指数（P=0.011 4）和瘤胃指数（P=0.024 8），且胸腺指数（P=0.014 0）随着铬添加水平的升高呈现先升高再降低的二次曲线变化，并在铬添加水平为1.2 mg/kg DM时有最大值。综合以上结果可知，在饲粮中添加铬可以在一定程度上提高妊娠后期母羊血清繁殖相关激素含量，并且可提高21日龄子代羔羊肾脏、胸腺和瘤胃指数。

关键词： 铬; 妊娠后期母羊; 子代羔羊; 采食量; 血清繁殖相关激素; 脏器指数

本文引用格式

刘琪, 肖芳, 陈诗宇, 周钰莹, 邹希豪, 黄艳玲 . 饲粮中添加铬对妊娠后期母羊繁殖性能及其子代羔羊生长发育的影响[J]. 动物营养学报, 2019 , 31(2) : 705 -712 . DOI: 10.3969/j.issn.1006-267x.2019.02.027

Abstract

The experiment was conducted to study the effects of dietary chromium on reproductive performance of ewes during late gestation and growth and development of their offspring. Forty Lezhi black ewes with the same parity (second parity) and similar body weight[(52.36±8.24) kg] at (90±4) d of gestation were randomly assigned to 4 groups with 10 replicates in each group and 1 ewe in each replicate, and the ewes were fed separately. The ewes in the 4 group were fed a basal diet supplemented with 0 (control), 0.4, 1.2 and 2.0 mg/kg DM chromium, respectively. Chromium was supplemented from chromium propionate. After the offspring goat kids were born, the number of the goat kids per replicate was adjusted to the same, and the goat kids were breast-fed to 21 days of age. The experiment period was 81 days in total. The results showed as follows:1) the dry matter intake (DMI) of ewes during late gestation and to 21 days after childbirth and the growth performance of offspring goat kids were not affected by dietary supplemented with different levels of chromium of ewes during late gestation (P>0.05). 2) Serum luteinizing hormone (LH) and estradiol (E2) contents of ewes at 120 d pregnancy were not affected by dietary supplemented with different levels of chromium of ewes during late gestation (P>0.05). Serum progesterone (P4) content of ewes at 120 d pregnancy was linearly improved by dietary supplemented with different levels of chromium of ewes during late gestation (P=0.016 2). Serum follicle stimulating hormone (FSH) content was quadratically improved as the dietary chromium supplemental level increase (P=0.050 4), and the highest value was obtained when chromium supplemental level was 0.4 mg/kg DM. 3) Kidney index (P=0.011 4) and rumen index (P=0.024 8) of 21-day-old offspring goat kids were linearly improved by dietary supplemented with different levels of chromium of ewes during late gestation. Thymus index was quadratically improved as the dietary chromium supplemental level increase (P=0.014 0), and the highest value was obtained when chromium supplemental level was 1.2 mg/kg DM. These results suggest that dietary supplemented with chromium can improve the contents of serum reproductive related hormones of ewes during late gestation to a certain extent, and increase kidney, thymus and rumen indexes of 21-day-old offspring goat kids.

Key words： chromium; late gestation ewes; offspring goat kids; feed intake; serum reproductive related hormones; organ indexes

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