Effects of DL-methionine supplement on growth performance and amino acid digestion and plasma concentrations in sika deer calves (Cervus nippon)
文献类型: 外文期刊
第一作者: Huang, Jian
作者: Huang, Jian;Sun, Wei-Li;Li, Chun-Yi;Liu, Han-Lu;Zhang, Tie-Tao;Bao, Kun;Fan, Yan-Yan;Li, Guang-Yu;Wang, Kai-Ying;Huang, Jian;Sun, Wei-Li;Li, Chun-Yi;Liu, Han-Lu;Zhang, Tie-Tao;Bao, Kun;Fan, Yan-Yan;Li, Guang-Yu;Wang, Kai-Ying
作者机构:
关键词: amino acids;apparent digestibility;DL-met;Met cycle
期刊名称:ANIMAL PRODUCTION SCIENCE ( 影响因子:1.533; 五年影响因子:1.779 )
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收录情况: SCI
摘要: This experiment was set to investigate the effects of DL-methionine (DL-met) supplement on growth performance and amino acid digestion and plasma concentrations in sika deer calves. Twelve healthy 5-month-old sika deer (29.44 +/- 2.86 kg initial bodyweight) were randomly divided into three groups (4/group) and one sika deer per replicate. Levels of Met supplement in three treatments were 0, 1 g/kg and 2 g/kg, respectively. The results showed that the average daily gain for the early 35-day study period tended (P = 0.07) to increase linearly as the Met supplement increased, the feed to gain ratio (F:G) for the early period decreased (linearly and quadratically, P < 0.05), and, in the late 35-day study period, tended (linearly, P = 0.08) to decrease as dietary Met increased. The apparent digestibility of Met increased (linearly and quadratically, P < 0.01) with graded amounts of supplemental Met, and the apparent digestibilities of valine, leucine, isoleucine, phenylalanine, glycine, aspartic and cystine showed a linear increase (P < 0.05). Plasma glycine, proline and isoleucine concentrations increased linearly and quadratically (P < 0.01) with Met supplementation, plasma serine and leucine increased linearly (P < 0.05), and plasma histidine, lysine, arginine and NH3 increased quadratically (P < 0.01 or P < 0.05), with graded amounts of supplemental Met. Met supplementation in the diet improved feed utilisation and amino acid (AA) nutrient digestion, and affected plasma AA concentrations in sika deer calves.
分类号: S`S8
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