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http://dx.doi.org/10.5333/KGFS.2005.25.3.177

Effects of Fiber Sources on Ruminal pH, Buffering Capacity and Digestibility in Sheep  

Seo, In-Jun (Kon-kuk University)
Kim, Myeong-Hwa (Kon-kuk University)
Kim, Dong-Sik (Kon-kuk University)
Lee, Sang-Rak (Kon-kuk University)
Maeng, Won-Jai (Kon-kuk University)
Publication Information
Journal of The Korean Society of Grassland and Forage Science / v.25, no.3, 2005 , pp. 177-184 More about this Journal
Abstract
This study was conducted to study the effect of fiber sources on ruminal pH and buffering capacity and whole digestive tract digestibility with five ruminally fistulated sheep. Evaluated fiber sources were alfalfa hay cube (AHC), corn cob (CC), com silage (CS), cotton seed hull (CSH), peanut hull (PHL), rice straw (RS), and sugarcane bagasse (SCB). Sheep were fed consecutively a diet containing each tested fiber source $(45\%)$ with a corn-based concentrate diets $(55\%)$ during each experimental period. Ruminal pH showed no difference among fiber sources except the significantly lower pH at 8h (p<0.05) with RS (pH; 5.78) than those in other sources. Buffering capacity showed significant differences at 0h (p<0.05) and 2h (p<0.05) after feeding in CS compared to those from SCB and CC, while there was higher in PHL (p<0.01) at 12h post feeding except AHC than CC, CS, SCB, and RS. Dry matter digestibility was significantly higher in CS (p<0.001) than in other sources. Neutral detergent fiber digestibility was higher in CC, CS, CSH, and RS than other fiber sources (p<0.001). These results suggest that ruminal pH and buffering capacity and whole digestive track digestibility were significantly affected by fiber sources in ruminant diet, and, therefore, should be took those effects into account for TMR formulation.
Keywords
Fiber sources; Ruminal pH; Buffering capacity; Digestibility; Sheep;
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