| 妊娠后期不同营养水平对蒙古绵羊胎儿生长发育的影响 |
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| 引用本文： | 高峰,侯先志.妊娠后期不同营养水平对蒙古绵羊胎儿生长发育的影响[J].中国农业科学,2007,40(6):1260-1264. |
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| 作者姓名： | 高峰 侯先志 |
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| 作者单位： | 内蒙古农业大学动物科学与医学学院,呼和浩特,010018 |
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| 基金项目： | 国家自然科学基金;国家博士研究生科研项目 |
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| 摘 要： | 【目的】研究妊娠后期不同营养水平限制饲养母羊对其胎儿生长发育的影响。【方法】选择经同期发情且同期受孕, 在妊娠90 d时健康的蒙古绵羊100只，ME分为0.175MJ•kg-1w0.75•d-1（RG1）、0.33 MJ•kg-1w0.75•d-1（RG2）以及自由采食组(CG)3个营养水平处理组，进行不同营养水平限制饲养。【结果】妊娠后期不同营养水平限饲母羊，严重限制了RG2（P＜0.05）、RG1（P＜0.01）两低营养组羔羊平均初生重及胎儿期平均日增重；限制了RG1组初生羔羊体长（P＜0.01）、胸围（P＜0.01）、肺脏（P＜0.01）、脾脏（P＜0.01）、心脏（P＜0.05）、肝脏（P＜0.05）及皱胃重（P＜0.01）。RG2组的肺脏（P＜0.05）、脾脏重（P＜0.01）表现出与对照组（CG）明显的差异，其它组织器官重尽管都不同程度的表现出降低的趋势，但与对照组差异不显著（P＞0.05）。各组织器官重占体重百分比，两限制组脾脏仍比对照组显著低（P＜0.01）。脑占体重的比例，对照组显著低于RG1组（P＜0.01）。【结论】妊娠后期不同营养水平限制饲养母羊显著影响了胎儿生长及器官发育，而且随着营养水平的降低，受限制的程度也逐步加深。
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| 关 键 词： | 妊娠后期 蒙古母羊 不同营养水平 胎儿 生长发育 |
| 收稿时间： | 2005-8-19 |
| 修稿时间： | 2005年8月19日 |
Effect of Maternal Undernutrition During Late Pregnancy on Ovine Fetal Growth and Development |
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| GAO Feng,HOU Xian-zhi.Effect of Maternal Undernutrition During Late Pregnancy on Ovine Fetal Growth and Development[J].Scientia Agricultura Sinica,2007,40(6):1260-1264. |
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| Authors: | GAO Feng HOU Xian-zhi |
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| Abstract: | This study investigated the effect of maternal undernutrition during late pregnancy on the fetal growth. 100 mongolia ewes allocated to three groups，which were oestrus at scheduled time and become pregnant, were given 0.175 MJME/kgw-0.75d -1 (Restricted Group 1 ;R1), 0.33 MJME/kgw-0.75d-1(Restricted Group 2;R2), and voluntary intake（control group ;CG） respectively during late pregnancy (90-150 d). The results indicated that during feed restriction period(late pregnancy) maternal undernutrition have significant effects on the lamb birth weight（p<0.01）and the average fetal growth rate（p<0.01） of restricted groups, and restricted the body length（p<0.01） and thoracic girth (p<0·01) of R1.The fetal lung（p<0.01）、spleen（p<0.01）、abomasum（p<0.01）、heart （p<0.05） and liver（p<0.05）weight were lighter in R1 than in control group animals， whilst in R2 only the weight of lung（p<0.01）、spleen（p<0.01）was lighter although the weight of other organs expressed a trend to decrease. The fetal brain weight in underfed were not restricted. When expressed as a rate of body weght, the spleen weights in restricted groups were still lighter （p<0.01） than in control group animals, but fetal brain weight in R1 was heavier than in control group（p<0.01）.In a word, maternal undernutrition during late pregnancy have effects on the fetal growth and development. |
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| Keywords: | Late pregnancy Ewe Undernutrition Foetus Growth and development |
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