• Journal of Animal Science and Technology
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• v.51 no.3
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• pp.241-248
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• 2009

Metabolic trial with 3 fistulated sheep was conducted in a 3 $\times$ 3 Latin square design and feeding trial with 24 Hanwoo steers in 12 month of age for 20 months was conducted to investigate the replacing effect of rice straw with fermented spent mushroom (Flammuliua velutipes) compost (FSMC) on fermentation characteristics, ruminal effective degradabilty and whole tract digestibility of nutrients in sheep, and to examine the growth performance of Hanwoo steers. Experimental diets for the metabolic trial with sheep were commercial concentrates and rice straw in the ratio of 70 : 30 (CON, DM basis). Same concentrate with 30% FSMC and 70% rice straw (FSMC-30) and 60% FSMC and 40% rice straw(FSMC-60). Diets for Hanwoo steers in three treatments were same as for metabolic trial in replacing ratio of rice straw with FSMC. pH of rumen fluid in sheep was not affected by FSMC. Ammonia-N content in the rumen fluid was highest in the sheep fed FSMC-60 at 3h (P<0.045). The CON diet increased (P<0.001) acetate proportion at 1h and 3h post feeding compared to FSMC-60 diet while propionate proportion was highest in the sheep fed FSMC-60 diet for all the sampling times (P<0.027~P<0.002). Increased proportion of butyrate was observed at 30 min prior to feeding (P<0.031), and 1h (P<0.011) and 6h(P<0.039) post feeding from sheep fed FSMC-30 diet compared to those from sheep fed other diets. Effective degradability in the rumen was not influenced by experimental diets. Whole tract digestibility of crude protein (P<0.031) and neutral detergent fiber (P<0.006) tended to be increased in the sheep fed CON diet while corresponding values were lowest in the sheep fed FSMC-60 diet. Total body weight gain of Hanwoo steers for 8 months was not different among diets, thus daily body gain was not influenced by the experimental diets.

• Journal of The Korean Society of Grassland and Forage Science
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• v.30 no.2
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• pp.169-178
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• 2010

The present study was conducted with four ruminally fistulated cattle to examine the fermentation characteristics and effective degradability (ED) in the rumen, and whole tract digestibility and TDN values of various silages (whole crop rye, RS; whole crop barley, BS; Italian ryegrass, IRGS and sudangrass, SGS) which were produced in Korea. The pH of rumen fluid were not greatly affected by silage at most times after feeding but SGS decreased (p<0.049) the ruminal ammonia-N concentration as 7.28 mg/100 ml at 3h after feeding compared to other silages. An acetate proportion from SGS feeding was higher at 1h (p<0.018), 3h (p<0.004) and 6h (p<0.019) after feeding than those from other silages. The propionate ($C_2$) proportion, however, was greater (p<0.001~p<0.042) for the RS and BS than the corresponding values of other silages up to 6h after feeding while the lowest $C_2$ proportion was observed from SGS. The butyrate proportion was lowest (p<0.007~p<0.027) in the cattle fed BS at 1~6h after feeding among silages. An ED of dry matter (DM) in the rumen was highest (P<0.048) for RS as 59.64%, and was reduced in the order of BS (56.12%), IRGS (55.64%) and SGS (54.02%). Similar tendency was observed in the EDs of crude protein (p<0.014) and organic matter (OM, p<0.039). The whole tract digestibility of DM (p<0.032), neutral detergent fiber (NDF, p<0.034) and OM (p<0.041) of SGS was greatly reduced. The TDN value based on whole tract digestibility of silages was highest for RS as 61.1%, and TDN values of BS, IRGS and SGS were 57.1%, 57.9% and 50.7%, respectively. Based on the results obtained from the present study, components in various whole crop silages produced in Korea might affect the ruminal VFA proportion, and especially, NDF content could greatly influence on the TDN value of silage calculated based on the NDF content.