Effects of L-methionine on growth performance, carcass quality, feather traits, and small intestinal morphology of Pekin ducks compared with conventional DL-methionine

文献类型： 外文期刊

第一作者： Zhang, Y. N.

作者： Zhang, Y. N.;Min, L.;Ruan, D.;Chen, W.;Wang, S.;Xia, W. G.;Luo, X.;Zheng, C. T.;Xu, R. S.;Shang, X. G.;Kim, H. Y.;Hong, Y. G.;Xie, C. Y.

作者机构：

关键词： DL- and L-methionine; feather trait; growth performance; Pekin ducks

期刊名称：POULTRY SCIENCE （ 影响因子：3.352； 五年影响因子：3.679 ）

ISSN： 0032-5791

年卷期： 2019 年 98 卷 12 期

页码：

收录情况： SCI

摘要： The research studied the effects of L-methionine (L-Met) on growth performance, carcass quality, feather traits, and small intestinal morphology of Pekin ducks compared with conventional DL-methionine (DL-Met). A total of 1080, 1-day-old male Pekin ducks were randomly allotted to 9 groups with 6 replicate pens of 20 birds each. During the starter phase (1 to 14 d), ducks were fed a basal diet (Met, 0.30%) or that supplemented with DL-Met or L-Met at 0.05, 0.10, 0.15, or 0.20% of feed. During the grower phase (15 to 35 d), ducks were fed a basal diet (Met, 0.24%) or that supplemented with DL-Met or L-Met at 0.04, 0.08, 0.12, or 0.16% of feed. Compared with ducks fed the basal diet, supplementation with either DL-Met or L-Met increased the body weight (BW) of ducks at days 14 and 35, increased average daily gain (ADG) and average daily feed intake (ADFI), decreased F:G at the starter phase, and increased ADG over the whole 35-d period (P < 0.05). The efficacy of L-Met compared to DL-Met was 140.1% for 14-d BW, 137.6% for ADG and 121.0% for F:G for days 1 to 14. Ducks fed diets supplemented with L-Met had greater proportion of leg muscle, higher than in ducks provided with DL-Met (P < 0.05). The breast muscle proportion was enhanced with DL-Met rather than L-Met supplementation (P < 0.01). The back feathers score and fourth primary wing feather length were increased with DL-Met or L-Met supplementation (P < 0.01), and there was increased efficacy of L-Met relative to DL-Met for back feathers score (153.1%). Dietary DL-Met or L-Met supplementation increased villus height of ileal mucosa of ducks at days 14 and 35 (P < 0.01). Overall, dietary L-Met or DL-Met supplementation affected the growth performance of ducks during the starter phase, and improved the feather traits and small intestinal morphology. The efficacy of L-Met to DL-Met ranged from 120 to 140% for growth performance of young ducks (1 to 14 d) and was 153% for the feather traits of ducks (35 d).

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