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KMID : 1025520050470030409
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Journal of Animal Science and Technology
2005 Volume.47 No. 3 p.409 ~ p.418
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Effect of Mugwort Processing Types on in vivo Digestibility and Ruminal Fermentation Characteristics in Sheep
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Kim J.-H.
Ko Y.-D.
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Abstract
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This study was conducted to examine the nutrient digestibility and ruminal fermentation characteristics in sheep fed dried mugwort and mugwort silage for 5% levels of rice straw in the basal diet, and mugwort pellet for 5% levels of concentrate in the basal diet. For the experiment, they were given a basal diet containing of rice straw and concentrate mixed at a 3:7 ratio (DM basis). The treatments were designed as a 4×4 Latin square design with four sheep (50.2kg body weight). The digestibility of crude protein was increased (p<0.05) to 4.6~6.2% in sheep fed mugwort silage treatments (60.23%) compared with those of control (54.08%) and dried mugwort treatment (55.67%). That of ether extract was iicreased (p<0.05) to 4.8~8.8% in sheep fed mugwort silage treatments (80.22%) compared with those of control (71.47%) and dried mugwort treatment (75.46%). In the dry matter intake, mugwort silage treatment (904.44g) was the hightest and mugwort pellet treatment, dried mugwort treatment and control were 810.66g, 780.66g and 742.18g, respectively. The ruminal pH in all treatments were rapidly decreased (p<0.05) at 0.5 and 1 hour after feeding and slowly increased at 2, 4 and 8 hours after feeding, especially mugwort silage treatment. The ammonia nitrogen concentrations were the highest (p<0.05) in sheep fed mugwort silage treatment (11.24~12.05mg/100ml) at 0.5 and 2 hours after feeding. The ruminal concentrations of acetic acid (6.06mmol/100ml) and propionic acid (2.35mmol/100ml) were an increased (p<0.05) at the mugwort silage treatments at 1 and 2 hours after feeding. Purine derivatives out put (13.41mmol/d) and microbial protein production (11.61mmol/d) were increased (p<0.05) compared with those of control (5.42 and 4.93 mmol/d).
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KEYWORD
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Mugwort silage, Nutrients digestibility, Fermentation characteristic, Purine derivative, Microbial protein synthesis
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