| 饲喂水平对杂交肉羊(公)营养物质代谢及能量需要量的影响 |
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| 引用本文： | 魏炳栋,刁其玉,陈群,杨华明,邱玉朗,王世琴,李林.饲喂水平对杂交肉羊(公)营养物质代谢及能量需要量的影响[J].动物营养学报,2017,29(10). |
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| 作者姓名： | 魏炳栋 刁其玉 陈群 杨华明 邱玉朗 王世琴 李林 |
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| 作者单位： | 1. 中国农业科学院饲料研究所,农业部饲料生物技术重点实验室,北京 100081;吉林省农业科学院畜牧分院,公主岭 136100;2. 中国农业科学院饲料研究所,农业部饲料生物技术重点实验室,北京 100081;3. 吉林省农业科学院畜牧分院,公主岭,136100 |
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| 基金项目： | 国家肉羊产业技术体系建设专项资金，农业部饲料生物技术重点实验室开放课题，吉林省肉羊产业体系 |
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| 摘 要： | 本试验旨在利用开放式呼吸测热装置研究肉羊(公)营养物质代谢及能量需要参数。采用完全随机试验设计,将15只出生日期相近、体况良好、体重相近的杜泊×小尾寒羊F1代公羔随机分成3组(每组5只羊),分别按自由采食(AL)、限饲70%(IR70)和限饲40%(IR40)3个饲喂水平投喂饲粮。分别在体重达到22和35 kg时进行试验,每期试验包括消化代谢试验(预试期3 d,正试期5 d)和呼吸代谢试验(适应呼吸代谢室24 h,连续测定5 d)。结果表明:1)随饲喂水平降低,肉羊的平均日增重极显著降低(P0.01),IR40组末重极显著低于AL组(P0.01)。2)随饲喂水平降低,肉羊干物质和氮采食量极显著降低(P0.01),但是这2者的表观消化率没有显著变化(P0.05)。3)随饲喂水平降低,肉羊甲烷产生量、甲烷能及产热量均降低,IR40组均极显著低于AL组(P0.01)。4)肉羊绝食60 h,呼吸熵为0.71,第1期和第2期甲烷产生量分别为0.86和1.18 L/d,绝食产热量分别为0.211和0.260 MJ/kg W0.75,维持净能分别为0.252和0.312 MJ/kg W0.75。综合得出,随饲喂水平降低,肉羊的生产性能、营养物质采食量、平均日增重、甲烷产生量、甲烷能及产热量均降低,但营养物质表观消化率没有显著变化。绝食状态下,甲烷产生量为0.86~1.18 L/d,绝食产热量为0.211~0.260 MJ/kg W0.75,维持净能为0.252~0.312 MJ/kg W0.75。
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| 关 键 词： | 肉羊 能量代谢 饲养水平 开放式呼吸测热装置 |
Effects of Feeding Level on Nutrient Metabolism and Energy Requirement Parameters of Crossbred Male Sheep |
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| WEI Bingdong,DIAO Qiyu,CHEN Qun,YANG Huaming,QIU Yulang,WANG Shiqin,LI Lin.Effects of Feeding Level on Nutrient Metabolism and Energy Requirement Parameters of Crossbred Male Sheep[J].Acta Zoonutrimenta Sinica,2017,29(10). |
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| Authors: | WEI Bingdong DIAO Qiyu CHEN Qun YANG Huaming QIU Yulang WANG Shiqin LI Lin |
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| Abstract: | This experiment was conducted to investigate nutrient metabolism and energy requirement parameters of crossbred male sheep using open respiratory calorimetry measuring device. The trail was conducted according to a completely random design. Fifteen Dorper and thin?tailed Han sheep crossbred F1 lambs were randomly al?located to 3 groups with 5 lambs per group. The lambs were offered diet for ad libitum ( AL) , 70% ( IR70) and 40% of ad libitum intake( IR40) , respectively. At 22 and 35 kg of body weight, two periods of test were carried out. Each period consisted of digestion and metabolism test ( 3 d of pre?experiment and 5 d of experi?ment) and respiratory metabolism test ( after 24 h adaption in respiratory metabolism room, 5 d recording was carried out) . The results showed as follows:1) with the decrease of feeding level, average daily gain was sig?nificantly decreased (P<0.01), and final weight of IR40 group was significantly lower than AL group (P<0.01) . 2) With the decrease of feeding level, dry matter and nitrogen intakes were significantly decreased ( P<0.01) , while apparent digestibility of them were not significantly affected ( P>0.05) . 3) With the decrease of feeding level, methane production, methane energy and heat production were deceased, and IR40 group was significantly lower than AL group ( P<0.01) . 4) After fasting for 60 h, respiratory quotient was 0.71, meth?ane production of the first and second periods was 0. 86 and 1. 18 L/d, respectively, fasting heat production (FHP) was 0.211 and 0.26 MJ/kg W0.75, respectively, and net energy for maintenance (NEm) was 0.252 and 0.312 MJ/kg W0.75, respectively. It is concluded that with the decrease of feeding level, growth perform?ance, nutrient intakes, average daily gain, methane production, methane energy and heat production are de?creased, while apparent digestibility of nutrients are not significantly affected. Under fasting condition, methane production is 0. 86 to 1. 18 L/d, FHP is 0. 211 to 0. 260 MJ/kg W0.75, and NEm is 0. 252 to 0.312 MJ/kg W0.75. |
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| Keywords: | meat sheep energy metabolism feeding level open respiratory calorimetry measuring device |
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