日粮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

doi:10.11843/j.issn.0366-6964.2013.09.012

Abstract

Abstract:

The experiment was conducted to investigate the effects of ADF levels on growth performance, 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 animal breeding experiment, digestibility experiment and slaughtering experiment, indexes were determined. 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 affected NH3-N concentration and butyrate acid concentration (P＜0.01) in caecum;The activity of xylanase and salicin were significantly increased as the levels of ADF increase (P＜0.01). In conclusion, the suitable ADF levels was 19% for the Rex Rabbits from weaning to 3-month-old.

CLC Number:

JING Chang-liang, LI Fu-chang, WANG Xue-peng, WANG Chun-yang. Effects of Dietary ADF Levels on Growth Performance，Nitrogen Metabolism, Cellulase Activity and Caecum Fermentation of Rex Rabbits from Weaning to 3-month-old[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2013, 44(9): 1417-1424.

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Effects of Dietary ADF Levels on Growth Performance，Nitrogen Metabolism, Cellulase Activity and Caecum Fermentation of Rex Rabbits from Weaning to 3-month-old

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