Development of rumen metabolism and ruminal epithelium in lambs.
Development of rumen metabolism and ruminal epithelium in lambs.
复制标题
羔羊瘤胃代谢和瘤胃上皮的发育。
DOI：
10.1080/17450399309386072
复制
发表时间：
1993
期刊：
影响因子：
--
通讯作者：
L. Kolodzieyski
中科院分区：
文献类型：
--
作者：
R. Žitňan;A. Bomba;A. Sommer;L. Kolodzieyski
观察了哺乳羔羊瘤胃内挥发性脂肪酸含量及瘤胃上皮细胞和附着于瘤胃壁的微生物区系的发育情况。总VFA浓度随年龄增长而增加。第1周龄(28.5mmol.l-1)与第4周龄(78.7mmol.l-1)和第6周龄(82.1mmol.l-1)与第10周龄(117.4 mmol.l-1)之间差异显著(P<0.01)。乙酸的摩尔比例在1周龄时最高(71.2%)，丙酸摩尔比例在6周龄时最高(20.8%)。乳突的长度和表面特征在10周内发生了巨大的变化。在1周龄和4周龄羔羊的样本中，乳头表面相对光滑，上皮细胞相对薄而平。在6周和10周大的羔羊样本中，组织形态通常是粗糙的。在1周大的羔羊中，球虫、单杆和短杆成对出现在非常低的种群水平。在4周时，外胚层群落明显变得更加复杂，细菌在较高的种群水平上存在。6周时的优势形态为杆状末端附着细菌。外膜微生物区系在10周时最复杂。
The concentrations of volatile fatty acids and the development of rumen epithelium and microflora adhered to rumen wall in suckling lambs were observed. Total VFA concentration increased with age. The differences between the 1st (28.5 mmol.l-1) and 4th week of age (78.7 mmol.l-1) and between 6th (82.1 mmol.l-1 and 10th week of age (117.4 mmol.l-1) were significant (p < 0.01). The highest molar proportion of acetic acid (71.2 mol%) was observed in 1 week-old lambs and the highest molar proportion of propionic acid in 6 week-old lambs (20.8 mol%). Length and surface characteristics of papillae changed dramatically over the 10-week period. In samples from 1-week and 4-week-old lambs, the papilla surface was relatively smooth and epithelial cells were relatively thin and flat. In samples from 6-week and 10-week-old lambs the tissue topography was typically rough. In the 1-week-old lambs the cocci, single rods and short rods in pairs were present at very low population levels. At 4 weeks the epimural community became notably more complex and bacteria were present at a higher population level. The dominant morphotype at 6 weeks was a rod-shaped end-on attached bacterium. The epimural microflora became the most complex at 10 weeks.