道寒杂交公羊育肥期能量需要量研究

doi:10.3864/j.issn.0578-1752.2013.23.025

摘要/Abstract

摘要： 【目的】确定道寒杂交公羊育肥期维持和生长的净能与代谢能需要量参数，为肉羊的科学饲养提供理论依据。【方法】本试验选用34只年龄相近（6月龄）、平均体重(34.54±0.40)kg的无角道赛特和小尾寒羊杂交公羔为试验羊。其中25只用于比较屠宰试验，随机分为自由采食组（15只）、60%自由采食组（5只）、40%自由采食组（5只），其中自由采食组又随机分为3组，每组5只。在正式试验开始后的第1天、第19 天（平均体重43 kg）、第63 天（平均体重50 kg）分别从自由采食第一组、第二组、第三组中选择体重接近的4只试验羊进行屠宰，同时，从60%自由采食组、40%自由采食组中分别选择体重接近的4只试验羊与自由采食第三组一起屠宰。另外9只用于消化代谢试验，同样按上述饲喂水平随机分为3组，采用全收粪尿法收集粪、尿，利用推荐公式对试验羊的甲烷能进行预测。【结果】道寒杂交公羊育肥期的维持净能需要量为286.88 kJ•kg-1 EBW0.75（269.09 kJ•kg-1 BW0.75），维持代谢能需要量为423.89 kJ•kg-1 EBW0.75（397.60 kJ•kg-1 BW0.75）。日增重100—350 g时生长净能和生长代谢能需要量分别为1.45—6.20 MJ•d-1、3.21—13.72 MJ•d-1。代谢能维持利用效率为0.68，代谢能生长利用效率为0.45。【结论】道寒杂交公羊育肥期能量代谢参数值与NRC（2007）推荐的能量需要量相比有一定差异。

关键词: 道寒杂交羊 , 代谢能 , 净能 , 能量代谢 , 能量需要量

Abstract: 【Objective】This research aimed to define the maintenance and growth of net energy and metabolic energy requirements parameters for Dorset sheep and thin-tailed Han sheep crossbred ram lambs in the fattening period, to provide a theoretical basis for scientific feeding mutton lambs.【Method】Thirty-five Poll Dorset sheep and thin-tailed Han sheep crossbred non-castrated ram lambs at 6 months of average age and (34.54±0.40) kg of initial body weight were selected in the study, and twenty-five lambs of them were used in a comparative slaughter trial. They were randomly divided into 3 intake level groups which were ad libitum group(15n),60% of ad libitum group(5n) and 40% of ad libitum group(5n), and ad libitum group was divided into three groups, each group have five sheep. Forth similar weight lambs of ad libitum 1st group, ad libitum 2nd group and ad libitum 3rd group were slaughtered on 1st day, 19th day(43 kg of average body weight) and 63rd day (50 kg of average body weight), respectively. Meanwhile, forth similar weight lambs of 60% and 40% of the ad libitum group were slaughtered concomitantly with lambs of ad libitum 3rd group. Another nine lambs were used in the digestion-metabolism trial, the lambs were randomly divided into three intake level groups as comparative slaughter trial. Total collection of feces and urine was conducted, and the recommended formulation was used to predict the methane energy. 【Result】The calculated daily net energy for maintenance (NEm) was 286.88 kJ•kg-1 metabolic empty BW (EBW0.75) or 269.09 kJ•kg-1 metabolic BW(BW0.75). The daily metabolizable energy for maintenance (MEm) was 423.89 kJ•kg-1 metabolic empty BW (EBW0.75) or 397.60 kJ•kg-1 metabolic BW(BW0.75). Net energy and metabolizable energy requirements for growth respectively ranged from 1.45 to 6.20 MJ•d-1 and 3.21 to 13.72 MJ•d-1 for daily gains of 100-350 g BW. The partial efficiency of ME utilization for maintenance (km) were 0.68. The partial efficiency of ME utilization for growth (kg) were 0.45. 【Conclusion】Energy requirement parameters of Dorest sheep and thin-tailed Hansheep ram lambs in the fattening period had some differences with those reported by NRC(2007).

Key words: hybrid ram of Dorset sheep and thin-tailed Han sheep , metabolic energy , net energy , energy metabolism , energy requirement

彭津津12, 张英杰1, 刘月琴1, 贾少敏1, 杜卫佳1. 道寒杂交公羊育肥期能量需要量研究[J]. 中国农业科学, 2013, 46(23): 5066-5074.

PENG Jin-Jin-12, ZHANG Ying-Jie-1, LIU Yue-Qin-1, JIA Shao-Min-1, DU Wei-Jia-1. Energy Requirements of Fattening Dorset and Thin-Tailed Han Crossbred Ram Lambs[J]. Scientia Agricultura Sinica, 2013, 46(23): 5066-5074.

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https://www.chinaagrisci.com/CN/Y2013/V46/I23/5066

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