A comparative study of nutrient digestibility, kinetics of digestion and passage and rumen fermentation pattern in goats and sheep offered medium quality forages at the maintenance level of feeding
作者:
M.D. Isac,
M.A. García,
J.F. Aguilera,
E. Molina Alcaide,
期刊:
Archiv für Tierernaehrung
(Taylor Available online 1994)
卷期:
Volume 46,
issue 1
页码: 37-50
ISSN:0003-942X
年代: 1994
DOI:10.1080/17450399409381756
出版商: Taylor & Francis Group
关键词: Digestibility;Degradability;Rumen fermentation;Goats;Sheep
数据来源: Taylor
摘要:
The in vivo digestibility and the rates of degradation and passage of alfalfa hay (AH) and vetch straw (VS) were compared in three Granadina goats and three Segureña wethers fed at approximately maintenance level, using a change over design. The nylon bag technique was used to estimate the fractional rate of degradation of the feeds in the rumen. The fractional outflow rate of hay and straw particles was determined with chromium as a marker. No significant differences in the digestibility coefficients of nutrients between animal species were found. Nitrogen retention expressed as coefficients of both nitrogen intake and digested nitrogen was lower (P < 0.01) in goats than in sheep when VS was offered. There was no significant difference betwen goats and sheep in the effective degradability (measured at outflow rates in the range of 0.027 to 0.032 h−1) of dry matter (DM) for either forage. However, the effective degradabilities of the neutral detergent fibre (NDF) and crude protein (CP) of VS were lower (P < 0.01 and P < 0.001, respectively), in goats than in sheep. The degradation rates of DM, NDF and CP were not significantly different (P > 0.05) between goats and sheep. Also, the fractional rate of passage of particles from the rumen was not different (P = 0.056) between species, although there was a tendency for an increased outflow rate in goats.
点击下载:
PDF (848KB)
返 回