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RISS 인기검색어
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- 저자 : 한면수 (검색결과 3 건)
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國産 飼料資源의 利用에 關한 硏究 : 大麥이 돼지의 肉質에 미치는 影響
한면수 建國大學校 農畜開發大學院 1987 국내석사
돼지의 肉質에 미치는 大麥의 影響을 調査하기 위하여 平均體重 76kg정도의 三元交雜種 (Landrace × Large white × Hampshire) 195頭를 選拔하여 基礎飼料와 基礎飼料에서 옥수수의 l0%(10 %大麥飼料) 그리고 20 %를 보리로 代置한 飼料(20 %大麥飼料)를 38 日間 給與하였다. 試驗飼育開始 및 終了體重, 飼料攝取量, 試驗飼育期間中 榮養素와 에너지의 消化率이 測定되었다. 試驗終了後 各 豚房에서 무작위로 5頭를 선정하여 總 45頭에 對하여 各各 屠體重, 일곱번째, 열번째, 맨 마지막늑골두위에서의 등지방두께와 열번째늑골부위에서의 등심단면적이 測定되었다. 試驗飼料를 給與한 돼지사이에 有意差는 發見되지 않았으나 20 % 大麥飼料를 給與하면 基礎飼料 및 10 %大麥飼料를 給與한 돼지에 比해 增體量은 낮아지고 飼料要求率이 높아지는 傾向이 있었다. 粗蛋白質消化率은 基礎飼料를 給與한 돼지에서 63.0 %였고 10 %大麥飼料 및 20 %大麥飼料를 給與한 돼지에서 各各 68.2 및 67.1 %로 增加하는 傾向이 있었다. 粗脂肪의 消化率은 試驗飼料給與區에 관계없이 35.3∼36.8 %로 서로 비슷하였다. 그러나 조섬유의 消化率은 20 %大麥飼料를 給與한 것이 31.4 %로서 基礎 및 10 %大麥飼料를 給與한 것의 40.6 및 40.7 %에 比해 낮아지는 傾向을 나타내었다. 可溶無窒素物의 消化率은 80∼84 %로 各 試驗區間에 뚜렷한 傾向이 없었다. 可消化에너지값은 基礎飼料가 g當 3.001 Kcal였으나 10 %大麥飼料는 3.252, 20 %大麥飼料는 3.240 Kcal로 增加하는 傾向이 있었다. 枝肉率 및 精肉率은 基礎飼料와 l0 %大麥飼料給與區사이에는 差異가 없었으며 20 %大麥飼料를 給與한 區에서 높아지는 傾向을 나타내었다. 평균등지방두께는 20 %大麥飼料를 給與한 돼지가 2.59 cm로 基礎飼料를 給與한 것의 2.82cm, 10 %大麥飼料를 給與한 것의 2.73cm 보다 현저하게 얇았다. 숫돼지의 枝肉率 및 精肉率도 20 %大麥飼料를 給與하면 다른 飼料를 給與한 것에 比해서 높아지는 傾向이 있었으며, 평균등지방두께 및 열번째늑골부위의 등지방두께는 基礎飼料를 給與한 것에 比해 大麥飼料를 給與한 것에서 모두 얇았다. 암돼지에서는 枝肉率은 73.7∼73.9 %로서 各 試驗區間에 差異가 없었으나 精肉率은 20 %大麥飼料를 給與한 것이 2.54cm로 基礎飼料의 2.61cm, 10 %大麥飼料의 2.72cm에 比해 얇아지는 경향을 나타내었다. 以上과 같이 20 %大麥飼料를 給與하면 基礎飼料를 給與한 것에 比해 枝肉率, 등심단면적 및 精肉率이 增加하였고 10 %大麥飼料를 給與하었을 때는 돼지의 生産性에 영향을 미치지 않는 것으로 나타났다. 따라서 大麥은 飼料中 10 %까지는 利用이 可能하며 肉質改善 目的으로 使用可能한 國産飼料資源이라는 것이 示唆되었다. In order to investigate an effect of a domestic barley on the carcass characteristics of pigs, (three way cross bred pigs Landrace X Large white X Hampshire) fed on a commercial diet until about 70kg were allotted to 17-23 pigs per pen and three pens per a diet, and then were fed on a commercial normal (basal) diet and diets substituted 10% (10% barley diet) or 20% (20% barley diet) of the domestic barley with yellow corn of the basal diet during 38 days of experimental feeding period. Digestibility of nutrients and energy of diets were measured during experimental period. And carcass dressing rate, loin eye area, backfat thickness at site of 7th rib, 10th rib and last rib and amount of lean meat were evaluated on 45 pigs chosen randomly 5 pigs per pen after experimental feeding was ended. During experimental feeding period body weight gain and feed conversion were not shown significant differences among pigs, while pigs fed 20% barley diet tended to decrease body weight gain and increase feed conversion compared with those fed basal and 10% barley diets. Pigs fed basal diet digested 63.0% of crude protein which was increased to 67.1 - 68.2% in pigs fed 10% or 20% barley diets. And digestibility of crude fiber in pigs fed 20% barley diet was 31.4% which was lower than those of 40.6-40.7% of pigs fed basal and loo barley diets. Also digestibility of crude fat and nitrogen free extracts (NFE) were in the range of 35.3-36.8% and 80-84%, respectively which were not found any significant differences among experimental diets. In the dry matter basis, basal diet contained 3.001 Kcal of digestible energy per gram which was increased to 3.252 and 3.240 Kcal in the 10 and 20% barley diets, respectively. Although carcass dressing rates and lean meat rates were not found any significant differences between pigs fed basal and 10% barley diets, an increasing tendency of carcass dressing rate and lean meat rate in pigs fed 20% barley diet compared with those of pigs fed basal and 10% barley diets. Average backfat thickness of pigs fed 20% barley diet mearsured at site of 7th rib, 10th rib and last rib was 2.59 cm which was clearly thinner compared with 2.82 and 2.73 cm of pigs fed basal and 10% barley diets, respectively. When castrated barrows were fed 20% barley diet, dressing rate and lean meat percent tended to increase and also, average and 10th rib's backfat thickness in pigs fed barley diets tended to decrease compared with those of pigs fed basal diet. In gilts, dressing rates were in the range of 73.7-73.9% which were not shown any significant differences among experimental diets. But pigs fed 20% barley diet accumulated the highest percent of lean meat among experimental groups and showed 2.54 cm of average backfat thickness which was thinner than those of 2.61cm and 2.72 cm of pigs fed basal and 10% barley diets, respectively. The results indicated that pigs fed barley diet substituted the domestic barley with yellow corn of basal diet increased' dressing rate, loin eye area and lean- meat rate and decreased backfat thickness compared with those of pigs fed basal diet. Then pigs fed the domestic barley will be improved the market carcass quality was suggested.
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