CAJ | 학술논문

本文旨在研究5～10周龄扬州鹅日粮中适宜的蛋氨酸水平.选用28日龄的健康扬州鹅150只,随机分成5组,每组3个重复,每个重复10只,公母各半.试验采用单因子有重复设计,日粮蛋氨酸水平分别为0.23%、0.33%、0.43%、0.53%和0.63%.结果表明:日粮不同蛋氨酸水平对5～10周龄扬州鹅生长性能、屠宰性能和血清生化指标均存在显著影响.(1)0.43%蛋氨酸水平试验组鹅的生长速度最快,料重比显著低于0.23%组(P＜0.05);(2)0.43%和0.53%蛋氨酸水平试验组鹅在屠宰率、半净膛率、全净膛率、胸肌率和腿肌率显著高于其他各组(P＜0.05),且随着日粮中蛋氨酸水平的增加腹脂率呈下降趋势,0.53%和0.63%组鹅腹脂率显著低于0.23%组(P＜0.05);(3)0.43%和0.53%蛋氨酸水平试验组鹅血清尿素氮(BUN)浓度显著低于0.23%组(P＜0.05),0.53%蛋氨酸水平试验组鹅血清总蛋白(TP)浓度显著高于0.23%组(P＜0.05).综上所述,当日粮蛋白质水平为15.82%时,建议5～10周龄扬州鹅日粮中适宜蛋氨酸水平为0.43%～0.53%.
본문지재연구5～10주령양주아일량중괄의적단안산수평.선용28일령적건강양주아150지,수궤분성5조,매조3개중복,매개중복10지,공모각반.시험채용단인자유중복설계,일량단안산수평분별위0.23%、0.33%、0.43%、0.53%화0.63%.결과표명:일량불동단안산수평대5～10주령양주아생장성능、도재성능화혈청생화지표균존재현저영향.(1)0.43%단안산수평시험조아적생장속도최쾌,료중비현저저우0.23%조(P＜0.05);(2)0.43%화0.53%단안산수평시험조아재도재솔、반정당솔、전정당솔、흉기솔화퇴기솔현저고우기타각조(P＜0.05),차수착일량중단안산수평적증가복지솔정하강추세,0.53%화0.63%조아복지솔현저저우0.23%조(P＜0.05);(3)0.43%화0.53%단안산수평시험조아혈청뇨소담(BUN)농도현저저우0.23%조(P＜0.05),0.53%단안산수평시험조아혈청총단백(TP)농도현저고우0.23%조(P＜0.05).종상소술,당일량단백질수평위15.82%시,건의5～10주령양주아일량중괄의단안산수평위0.43%～0.53%.
A dose-response experiment with different dietary levels of methioninewas conducted to estimate opti-mum dietary methionine level for 5～10 week-old Yangzhou gosling. One hundred and fifty 2S-day-old Yangzhou goslings were divided into 15 pens with 10 birds per pen according to similar pen weight. There were 5 dietary treat-ments, each containing 3 replicate pens. Five levels of dietary methionine (Met) were 0.23%, 0.33%, 0.43%, 0.53% and 0.63%. The results were as follows: there were significant difference among groups in growth performance,carcass characteristics and serum parameters (P＜0.05). The feed/gain of goslings fed 0.43% Met was lower than those fed 0.23% Met (P＜0.05). Goslings fed 0.43% and 0.53% Met were higher than other treatments on the items of slaughter percentage, semi-eviscerated percentage, eviscerated percentage, breast meat percentage and leg muscle percentage, and abdominal fat percentage of goslings fed 0.53% and 0.63% Met were lower than goslings fed 0.23% Met (P＜0.05). Content of BUN of goslings fed 0.43% and 0.53% Met were lower than goslings fed 0.23% Met (P＜0.05), and content of TP of goslings fed 0.53% Met were higher than goslings fed 0.23% Met (P＜0.05). According to the results, when the dietary protein level was 15.82% the optimal Met requirement of Yangzhou goslings of 5～10 weeks was 0.43%～0.53%.