日粮能量水平对山羊个体和瘤胃上皮生长的影响  

Effects of dietary energy levels on growth and rumen epithelium in goats

作　　者：卢劲晔[1,2] 沈赞明[2] 

机构地区：[1]江苏农牧科技职业学院,江苏泰州225300 [2]南京农业大学动物医学院,江苏南京210095

出　　处：《畜牧与兽医》2014年第8期1-5,共5页Animal Husbandry & Veterinary Medicine

基　　金：国家自然科学基金(30771568);国家973计划项目(2011CB100801)

摘　　要：系统研究日粮能量水平对山羊瘤胃上皮生长的影响,并初步探讨了高能量日粮促进瘤胃上皮生长的细胞和分子生物学机理。选取18只青年波杂山羊(波尔山羊×淮南羊,120 d,体重(14.27±0.69)kg)随机分成高能量组(HL,n=9,ME:1.00 MJ/(kg0.75·d))和低能量组(LL,n=9,ME:0.60 MJ/(kg0.75·d)),饲喂持续42 d。结果:与LL组相比,HL组山羊日增重、瘤胃干重、瘤胃上皮乳头长度和表面积显著增大(P<0.05),表明高能量日粮显著促进瘤胃上皮乳头生长。组织切片观察发现,HL组棘突层和颗粒层细胞层数增多(P<0.05),体积减小(P<0.05),提示高能量日粮促进瘤胃乳头生长主要通过加速细胞增殖,而非细胞肥大。The study systemically investigated the effect of dietary energy levels on the growth of rumen epithelium. The underlying cellular and molecular mechanisms were also discussed in this paper. Eighteen young crossbred goats（ Boer×Yangtze River Delta White,120 d,BW14. 27±0. 69 kg） were used in this study. Goats were randomly allocated to two groups,high energy level（ HL,n = 9,ME： 1. 00 MJ /（ kg0. 75·d）） and low energy level（ LL,n=9,ME： 0. 60 MJ/（ kg0. 75·d））. After 42 d feeding period,goats were slaughtered. The results showed that： 1） the average daily gain,empty weight of rumen,length and surface of rumen papillae were significantly increased in the HL group than those in the LL group（ P〈0. 05）. 2） the number of substratum spinosum and stratum granulosum in HL group was significantly higher than that in LL group（ P〈0. 05）,while the cell size of rumen epithelium was decreased in response of high energy level of diet（ P〈0. 05）,demonstrating that energy-rich diet promoted the growth of rumen epithelium through cell proliferation rather than hypertrophy.

关 键 词：日粮能量 山羊 瘤胃上皮 增殖 

分 类 号：S827[农业科学—畜牧学]