Ruminant Nutrition

Solid and Fluid Outflow Rate of the First Compartment in Alpaca and Rumen in Sheep

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  • College of Animal Sciences, Shanxi Agricultural University, Taigu 030801, China

Received date: 2014-12-08

  Online published: 2015-05-13

Abstract

This experiment was conducted to determine the outflow rate of solids and fluid using double markers of chromium (Cr) and cobalt (Co) from the first compartment in alpaca and rumen in sheep. Three healthy male alpacas [(27.0±4.6) kg] and Jinzhong sheep [(26.2±2.7) kg] were selected. The results showed as follows: estimated by multicompartmental model, in comparison to sheep, solid slow outflow rate k1 showed a decreasing tendency (3.44%/h vs. 4.32%/h, P=0.072) and solid fast outflow rate k2 was significantly lower in alpaca (16.90%/h vs. 35.06%/h, P<0.01). There was no significant difference to solid outflow rate k estimated by exponential model between alpaca (5.13%/h) and sheep (5.14%/h) (P>0.05). Mean residence time (MRT) of alpaca was higher than that of sheep in both models. Estimated by gamma 4 model and exponential model, no significant difference was recorded to fluid outflow rate k between alpaca (6.21%/h and 7.73%/h) and sheep (7.02%/h and 8.43%/h) (P>0.05). The volume (6.23 L) and out follow speed of the first compartment in alpaca(0.44 L/h) were significantly lower than those in sheep (10.69 L and 0.90 L/h) (P<0.05). In conclusion, gastrointestinal retention time of digesta in alpaca is longer than that in sheep, and the difference can partly explain the reason that alpaca has a higher roughage digestion rate.

Cite this article

YAO Jianjun, WANG Juan, LIU Qingqing, YANG Zhongmin, PEI Caixia, LIU Qiang . Solid and Fluid Outflow Rate of the First Compartment in Alpaca and Rumen in Sheep[J]. Chinese Journal of Animal Nutrition, 2015 , 27(5) : 1394 -1400 . DOI: 10.3969/j.issn.1006-267x.2015.05.009

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