不同硒源对滩羔羊瘤胃前背盲囊乳头的影响

Effects of Different Sources of Selenium on the Morphological Characteristics of Papillae in the Atrium Ruminis of Tan Sheep Lambs

试验旨在探讨不同硒源对滩羔羊瘤胃前背盲囊乳头生长发育的影响。选50只体重相近、年龄相仿(约45日龄)、健康无病的公滩羔羊,随机分为2组,每组25只。其中,对照组日粮添加亚硒酸钠,试验组日粮添加酵母硒,2组日粮中硒含量均为0.30 mg/kg DM。试验羊饲喂60 d后,屠宰取瘤胃,应用游标卡尺分别测定2组羔羊瘤胃前背盲囊(瘤胃房)乳头高度、宽度和密度。结果表明,瘤胃前背盲囊乳头高度、宽度和密度均为试验组高于对照组,差异显著(P<0.05);瘤胃前背盲囊的角质层厚度和固有膜宽度为对照组稍高于试验组,但差异不显著(P>0.05)。试验结果表明,日粮中添加0.30 mg/kg的酵母硒较亚硒酸钠更能促进瘤胃前背盲囊乳头的生长发育。

This study was aimed to assess the effects of different sources of selenium on the morphological characteristies ofpapillae in the atrium ruminL of Tan sheep lambs. A total of fifty healthy male Tan sheep lambs with similar body weight and age（about 45-day-old） were randomly and averagely assigned into two groups： the control group fed a diet supplemented withsodium selenite, the experimental group were fed with the diet supplemented with selenium yeast. The content of selenium in bothof the two diets was 0.30 mg/kg DM. The lambs were slaughtered and their tureen samples were recovered after a sixty-dayfeeding trail. The height, width and density of the papillae in the atrium ruminis of the lambs were determined with verniercaliper. The results showed that the lambs in experimental group had significantly higher height, width and density of the papillaein the atrium rttminis compared to the control group （P〈0.05） ; slightly higher thickness of stratum eorneum and width of laminapropria were observed in the arium ruminis of the lambs in experimental group compared to the control group （P〉0.05）. It wasindicated that the dietary supplementatinn of 0.30 mg/kg of selenium yeast performed better in promoting the growth anddevelopment of papillae in the atrium ruminis than supplementation of sodium selenite.