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首页> 外文期刊>Tropical and Subtropical Agroecosystems >METABOLIZABLE ENERGY INTAKE AND CHANGES IN BODY WEIGHT AND BODY CONDITION OF PELIBUEY EWES FED THREE LEVELS OF ROUGHAGE DIETS UNDER TROPICAL CONDITIONS
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METABOLIZABLE ENERGY INTAKE AND CHANGES IN BODY WEIGHT AND BODY CONDITION OF PELIBUEY EWES FED THREE LEVELS OF ROUGHAGE DIETS UNDER TROPICAL CONDITIONS

机译：热带条件下饲喂三层杂粮的小蜂身体重量和身体状况的可代谢能量吸收和变化。

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The aim of the study was to evaluate the effect of metabolizable energy intake (MEI) on changes in body weight (BW) and body condition score (BCS) of non pregnant, non lactating Pelibuey ewes. The experiment had two phases: first, 24 three-yr-old ewes were kept in pens (six ewes per pen) and fed for 60 days to homogenize BW and BCS. Thereafter ewes with BW 37.2 ± 4.1 kg, BCS of 2.5±0.12 (mean±SD), were randomly divided in groups of six animals, and one group was slaughtered for baseline measurements; the remaining groups were assigned to a completely randomized experimental design and individually penned in metabolic crates, and fed at low (L), medium (M) and high (H) MEI for 65 days. Feeding was based on Taiwan grass (Pennisetum purpureum) given at a rate of 44 g DM/kgBW0.75/day, and a supplement (140 g CP/kgDM and 11.5 MJ mE/kgDM) given at 0, 16 and 32 g DM/kgBW0.75/day for L, M and H respectively. After 65 days, daily BW changes were: -107, -21 and 30 g/day for L, M and H respectively. Changes in BCS were: -0.8, 0.0 and 0.5 points for L, M and H respectively. MEI was different (P 0.05), MEI were 0.247, 0.472 and 0.532 MJ/kgBW0.75/day for L, M and H respectively. A unit of change in BCS corresponded to 5.8 kg BW in adult Pelibuey ewes. It was required 60 MJ of ME above maintenance to gain a kg of BW, indicating that a unit change in BCS may require 345 MJ of ME. Our data suggest that MEm may range from 0.481 to 0.529 MJ/kgBW0.75/day, values higher than previously reported.
机译：这项研究的目的是评估可代谢能量摄入（MEI）对非怀孕，非泌乳Pelibuey母羊体重（BW）和身体状况评分（BCS）变化的影响。实验分为两个阶段：首先，将24只三岁的母羊圈养在围栏中（每只母羊六头母羊），并喂饲60天以使BW和BCS均质。此后，将体重为37.2±4.1千克，BCS为2.5±0.12（平均值±标准差）的母羊随机分为6组，每组宰杀一组进行基线测量。其余各组被分配到完全随机的实验设计中，并单独放入代谢箱中，以低（L），中（M）和高（H）MEI喂养65天。以台湾草（Pennisetum purpureum）的饲喂量为44 g DM / kgBW0.75 /天，并以0、16和32 g DM的量补充（140 g CP / kgDM和11.5 MJ mE / kgDM） L，M和H分别为/kgBW0.75/天。 65天后，L，M和H的每日BW变化分别为：-107，-21和30 g /天。 BCS的变化分别为：L，M和H分别为-0.8、0.0和0.5点。 L，M和H的MEI不同（P 0.05），MEI分别为0.247、0.472和0.532 MJ / kgBW0.75 /天。 BCS的变化单位相当于成年Pelibuey母羊的5.8千克体重。需要高于维护水平60 MJ的ME才能获得一千克的BW，这表明BCS的单位更改可能需要345 MJ的ME。我们的数据表明，MEm的范围可能为0.481至0.529 MJ / kgBW0.75 /天，该值高于先前报道的水平。

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