CAJ | 학술논문

为明确育肥时间对延黄牛的生长性能和肌肉品质的影响，测量了延黄牛（阉牛）6，12，18，24，36月龄体重及体尺指标，比较了24月龄和36月龄的肉质性状。结果表明：随着育肥时间的延长，延黄牛体重、体高、体长、坐骨端宽和管围等体尺指标逐步提高，但体高、体长的增长幅度逐渐降低，体重、胸围、坐骨端宽、管围的最快增长期分别为18～24，6～12，12～18，6～12月龄。与24月龄延黄牛相比，36月龄个体眼肌面积显著增加（ P＜0?05），大理石花纹等级显著提高（ P＜0?05），背膘厚、粗脂肪含量、脂肪酸含量极显著增加（ P＜0?01），剪切力显著降低（ P＜0?05），精氨酸、甘氨酸、异亮氨酸、组氨酸、苯丙氨酸含量显著高于24月龄（ P＜0?05），赖氨酸和脯氨酸含量极显著高于24月龄（ P＜0?01）。不同育肥时间对延黄牛体重、体尺、产肉性能、肌肉品质和营养价值具有显著影响，延黄牛育肥至36月龄其牛肉品质更优、营养价值更高。
위명학육비시간대연황우적생장성능화기육품질적영향，측량료연황우（엄우）6，12，18，24，36월령체중급체척지표，비교료24월령화36월령적육질성상。결과표명：수착육비시간적연장，연황우체중、체고、체장、좌골단관화관위등체척지표축보제고，단체고、체장적증장폭도축점강저，체중、흉위、좌골단관、관위적최쾌증장기분별위18～24，6～12，12～18，6～12월령。여24월령연황우상비，36월령개체안기면적현저증가（ P＜0?05），대리석화문등급현저제고（ P＜0?05），배표후、조지방함량、지방산함량겁현저증가（ P＜0?01），전절력현저강저（ P＜0?05），정안산、감안산、이량안산、조안산、분병안산함량현저고우24월령（ P＜0?05），뢰안산화포안산함량겁현저고우24월령（ P＜0?01）。불동육비시간대연황우체중、체척、산육성능、기육품질화영양개치구유현저영향，연황우육비지36월령기우육품질경우、영양개치경고。
In order to survey the effects of fattening period on growth performance and meat quality of Yan?yellow cattle ( steer) , body weight and body size indexes in different fattening periods ( 6, 12,18,24 and 36?month?old) were measured, and meat quality indexes were compared between 24 and 36?month?old cattle. The results showed that body weight, body height, body length, sciatic wide and canno round were gradually improved with the increase of fattening period, and variability body height and body length were gradually decreased. The peak of growth rate of body weight, chest circumference, sciatic wide and canno round occurred at 18?24?, 6?12?, 12?18? and 6?12?month?old, respectively. Compared with the 24?month?old individuals, the 36?month?old Yan?yellow cattle had higher eye muscle area and marbling grade ( P<0?05) , higher back fat thickness and crude fat content ( P<0?01) , lower shear force ( P<0?05) , higher fatty acids and amino acids ( lysine and proline) content ( P<0?01 ) , and higher amino acid ( arginine, glycine, isoleucine, histidine, phenylalanine) content (P<0?05). In conclusion, fattening period had remarkable effect on body weight, body size indexes, meat performance, meat quality and nutritive value, and suitable slaugh?ter age for Yan?yellow cattle was 36?month?old .