摘要
本研究旨在研究日粮不同ADF水平对断奶至3月龄獭兔生长性能、氮代谢、纤维素酶活和盲肠发酵的影响。本试验采用单因子完全随机试验设计,日粮设5个ADF水平:15%(A组)、17%(B组)、19%(C组)、21%(D组)、23%(E组),选用35日龄断奶獭兔200只(体重相近,公母各半),随机分成5组,每组40个重复,预试期7d,正试期53d。通过动物饲养试验、消化代谢试验、屠宰试验对獭兔的相关指标进行研究。结果表明,在初始体重无显著差异的情况下,日粮ADF水平对断奶至3月龄獭兔采食量(ADI)和料重比(F/G)有显著影响(P<0.05);日粮ADF水平极显著或显著影响食入氮(IN)(P<0.01)和粪氮(FN)(P<0.05),其中C组氮的利用率(RN/IN)和氮的生物利用率(RN/DN)最高;日粮ADF水平对断奶至3月龄獭兔盲肠氨氮浓度和丁酸浓度影响极显著(P<0.01);日粮ADF水平对断奶至3月龄獭兔盲肠内木聚糖酶活和水杨苷酶活影响极显著(P<0.01)。本试验结果表明,断奶至3月龄獭兔的适宜日粮ADF水平为19%。
The experiment was conducted to investigate the effects of ADF levels on growth per- formance, nitrogen metabolism, cellulase activity and caecum fermentation of Rex Rabbits from weaning to 3-month-old. Using a one-factor completely randomize design, two hundred weaned Rex Rabbits with similar body weight were randomly divided into 5 treatments（40 replicates per treatment, 1 rabbit per replicate） feeding diets containing ADF 15 %, 17 %, 19 %, 21%, 23 %, respectively. The trial lasted for 7 days for adaptation, and 53 days for test, respectively. By ani- mal breeding experiment, digestibility experiment and slaughtering experiment, indexes were de- termined. In the case of the initial body weight had no significant difference, the results showed that the levels of dietary ADF significantly affected the feed intake（ADI）and feed gain ratio（F/G） （P〈0.05） ; the dietary ADF levels significantly affected the nitrogen intake（IN） （P〈0.01） and fecal nitrogen（FN）（P〈0.05） ; the nitrogen utilization（RN/IN）and the bioavailability of nitrogen （RN/DN）reached to the maximum in C group; the levels of dietary ADF significantly affectedNH3-N concentration and butyrate acid concentration （P〈0.01） in caecum;The activity of xyla nase and salicin were significantly increased as the levels of ADF increase （P〈0.01）. In conclu sion, the suitable ADF levels was 19% for the Rex Rabbits from weaning to 3-month-old.
出处
《畜牧兽医学报》
CAS
CSCD
北大核心
2013年第9期1417-1424,共8页
ACTA VETERINARIA ET ZOOTECHNICA SINICA
基金
现代农业产业技术体系建设专项(CARS-44-B-1)
国家公益性行业(农业)科研专项(200903006)
关键词
酸性洗涤纤维
獭兔
生长性能
氮代谢
纤维素酶活
盲肠发酵
ADF
Rex Rabbit
growth performance
nitrogen metabolism
cellulase activity
cae cum fermentation
