日粮组成对羔羊瘤胃消化发育的影响。

The effect of diet composition on the development of rumen digestion in lambs.

作者信息

Zitnan R, Bomba A, Lauková A, Sommer A, Kolodzieyski L, Venglovský J, Bindas L

机构信息

Research Institute of Animal Production Nitra, Kosice, Slovakia.

出版信息

Arch Tierernahr. 1993;45(2):161-71. doi: 10.1080/17450399309386097.

DOI:10.1080/17450399309386097

PMID:7487477

Abstract

The effect of composition of feed concentrate on the development of rumen digestion in suckling lambs was investigated. The experimental group of lambs was offered special concentrate diets (SCD I and SCD II), which, compared to routinely produced commercial mixtures CCD 1 and CCD 2, were completely cleared of milk protein, enriched with legumes and alfalfa meal and supplemented with cut alfalfa of the particle size 1 cm. Significantly higher concentrations of total volatile fatty acids (VFA) were recorded in experimental lambs at the age of 7, 9 and 11 weeks. The highest concentration of total VFA was observed at the age of 11 weeks (118.2 mmol.l-1 in the experimental group and 110.2 mmol.l-1 in the control group). The cellulase activity (endoglucanase E.C.3.2.1.4. and cellobiohydralase E.C 3.2.1.91.) of the rumen content of experimental lambs was significantly higher at the age of 9, 11 and 15 weeks, in comparison with the control animals, reaching the highest values at 11 weeks of age (19.32 micrograms.ml-1 in the experimental group, 15.84 micrograms.ml-1 in the control group), while the increase of number of cellulolytic bacteria in experimental lambs was insignificant. Scanning electron microscopy showed more pronounced colonization of the rumen epithelium by adherent rumen microflora in experimental lambs. Average daily weight gains over the whole investigated period reached 0.235 kg in the experimental group and 0.221 kg in the control group.

摘要

研究了精饲料组成对哺乳羔羊瘤胃消化发育的影响。给实验组羔羊提供特殊精饲料日粮（SCD I和SCD II），与常规生产的商业混合料CCD 1和CCD 2相比，这些日粮完全不含乳蛋白，富含豆类和苜蓿粉，并添加了粒径为1厘米的切碎苜蓿。在7、9和11周龄的实验羔羊中，总挥发性脂肪酸（VFA）浓度显著更高。在11周龄时观察到总VFA浓度最高（实验组为118.2 mmol·l-1，对照组为110.2 mmol·l-1）。与对照动物相比，实验羔羊瘤胃内容物的纤维素酶活性（内切葡聚糖酶E.C.3.2.1.4和纤维二糖水解酶E.C 3.2.1.91.）在9、11和15周龄时显著更高，在11周龄时达到最高值（实验组为19.32微克·毫升-1，对照组为15.84微克·毫升-1），而实验羔羊中纤维素分解菌数量的增加不显著。扫描电子显微镜显示，实验羔羊瘤胃上皮被附着的瘤胃微生物群更明显地定殖。在整个研究期间，实验组的平均日增重达到0.235千克，对照组为0.221千克。