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Evaluations of Nutrient Compositions and In Situ Ruminal Disappearance Rates of Roughage Sources Commonly Used in Korea
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Evaluations of Nutrient Compositions and In Situ Ruminal Disappearance Rates of Roughage Sources Commonly Used in Korea
Na, Young Jun; Lee, Kyung Won; Hong, Kyung Hee; Lim, Jong Soo; Kim, Myeong Hwa; Kim, Kyeong Hoon; Lee, Sang Rak;
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This study is conducted to estimate the nutrient compositions and in-situ ruminal disappearancerates of roughage sources which are commonly used in South Korea. Twelve types of roughage sources are being selected based on surveys from more than 50 farms, and 12 samples from various farms and companies are collected and analyzed for their nutritive components and minerals. Two Hanwoo steers (BW kg) with ruminal cannula are used to investigate in situ ruminal degradability. Five roughage sources, timothy hay, alfalfa pellet, rice straw, klein grass hay and tall fescue straw, are all selected from 12 roughage sources above for further experiments. Overall, the nutrient components and minerals from the 12 roughage sources have shown low values when comparing with standard tables of feed compositions in Korea. In situ dry matter disappearance rate is recorded as high in order of klein grass, timothy, alfalfa pellet, tall fescue and rice straw. In situ crude protein disappearance rate is high in order of alfalfa pellet, klein grass, timothy, tall fescue and rice straw.
In situ disappearance rate;Nutrient composition;Roughage;Ruminant;South Korea;
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