早期断奶羔羊代乳粉饲喂水平对营养物质消化代谢及血清生化指标的影响

doi:10.3864/j.issn.0578-1752.2011.21.015

Abstract

Abstract: 【Objective】This study was performed to investigate the effects of different feeding levels of a milk replacer on growth performance, nutrient digestion and metabolism, and serum biochemical parameters in early weaned lambs. 【Method】Twenty seven newborn crossbred F1 lambs (Dorset×Thin-Tailed Han sheep) were randomly divided into 3 groups and each fed with a milk replacer at 1.0% (L), 1.5% (M) or 2.0% (H) of BW. Digestion and metabolism trials were carried out from 50 to 60 and from 80 to 90 d of age, respectively. Blood metabolites were determined at 50 and 90 d of age. 【Result】 The growth performance of lambs was improved as the feeding levels of the milk replacer increased, significant differences in the BW and BL existed among three treatments (P＜0.05). As feeding levels increased, the digestibility of DM, OM, GE, N, EE, Ca and P rose. The digestibility of DM, GE, N, EE, Ca and P in the L group was significantly lower than that in the H group (P＜0.05), but the retention of N in the H group was only 70.9%, which was significantly lower than that in the L group (78.7%) (P＜0.05). At 50 d of age, no significant differences in the serum concentration of TP, BUN, GLU, CHOL and TG were detected among the groups(P＞0.05), but the activity of serum ALP in lambs from the L or M group was significantly lower than that from the H group (P＜0.05). At 90 d of age, the serum concentration of CHOL in the H group was significantly higher than that in the L group (P＜0.05). 【Conclusion】 A proper feeding level of milk replacers significantly improved the growth performance, and nutrient digestion and metabolism. The lambs of 20-50, 50-70 and 70-90 d of age were suggested to be fed at 2.0%, 1.5% and 1.0% BW, respectively.

Key words: lambs, milk replacer, feeding level, digestion, metabolism, serum biochemical indexes

YUE Xi-Xin, DIAO Qi-Yu, MA Chun-Hui, DENG Kai-Dong, TU Yan, JIANG Cheng-Gang, DU Hong-Fang. Effects of Feeding Levels of a Milk Replacer on Digestion and Metabolism of Nutrients, and Serum Biochemical Indexes in Lambs[J].Scientia Agricultura Sinica, 2011, 44(21): 4464-4473.

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Effects of Feeding Levels of a Milk Replacer on Digestion and Metabolism of Nutrients, and Serum Biochemical Indexes in Lambs

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