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草业学报 ›› 2019, Vol. 28 ›› Issue (5): 100-108.DOI: 10.11686/cyxb2018297

• 研究论文 • 上一篇    下一篇

不同类型藏羊消化率与采食量的比较研究

焦婷1, 吴铁成2, 吴建平3, 赵生国2, 雷赵民2, 梁建勇1, 冉福1, 九麦扎西4, 刘振恒5   

  1. 1.甘肃农业大学草业学院,草业生态系统教育部重点实验室,中-美草地畜牧业可持续发展研究中心,甘肃 兰州 730070;
    2.甘肃农业大学动物科学技术学院,甘肃 兰州 730070;
    3.甘肃省农业科学院,甘肃 兰州 730070;
    4.甘南藏族自治州夏河县动物疫病预防控制中心,甘肃 夏河 747100;
    5.甘肃省玛曲县草原站,甘肃 玛曲 747300
  • 收稿日期:2018-05-08 修回日期:2018-07-11 出版日期:2019-05-20 发布日期:2019-05-20
  • 作者简介:焦婷(1976-),女,甘肃靖远人,副教授,博士。E-mail: jiaot@gsau.edu.cn
  • 基金资助:
    农业部公益性行业(农业)科研专项(201003019, 201503134和201303059),甘肃现代农业(草食畜)产业技术体系(CARS-CS-4)和现代农业产业技术体系(CARS-40-09B)资助

A comparative study on digestibility and feed intake of Tibetan sheep of different types

JIAO Ting1, WU Tie-cheng2, WU Jian-ping3, ZHAO Sheng-guo2, LEI Zhao-min2, LIANG Jian-yong1, RAN Fu1, JIU MAI Zha-xi4, LIU Zhen-heng5   

  1. 1.College of Pratacultural Science, Gansu Agricultural University, Key Laboratory of Grassland Ecosystem, Gansu Agricultural University, Ministry of Education, Sino-U.S. Centers for Grazingland Ecosystem Sustainability, Lanzhou 730070, China;
    2.College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;
    3.Gansu Academy of Agricultural Sciences, Lanzhou 730070, China;
    4.Xiahe County, Animal Disease Prevention and Control Center in Gannan Tibetan Autonomous Prefecture, Xiahe 747100, China;
    5.Grassland Management Office of Maqu County, Maqu 747300, China
  • Received:2018-05-08 Revised:2018-07-11 Online:2019-05-20 Published:2019-05-20

摘要: 采食量是放牧家畜生产性能的重要影响因素,在草地生态系统中起重要作用。夏季在甘南夏河分别选取不同生理类群(羔羊、1岁母羊、2岁母羊、3岁母羊、4岁母羊、羯羊和种公羊)的欧拉型、甘加型和乔科型藏羊各4只进行试验。采用二氧化钛指示剂法与粪氮指数法分别测定藏羊排粪量和牧草有机物质消化率,从而计算放牧采食量,并对特征间的相关性进行研究。结果表明:欧拉型、乔科型和甘加型藏羊的平均放牧采食量分别为1031.93、834.59和956.15 g·d-1,乔科型藏羊放牧采食量显著(P<0.05)小于欧拉型和甘加型藏羊。3个类型藏羊的每kg代谢体重采食量和干物质采食量占体重比差异均不显著(P>0.05)。欧拉型、乔科型和甘加型藏羊对夏河天然草地牧草的平均有机物质消化率分别为50.79%、47.22%和55.58%。欧拉型、乔科型和甘加型藏羊的平均排粪量分别为561.26、484.06和466.74 g·d-1,其中欧拉型藏羊的排粪量显著高于其他两个类型。试验在高寒地区天然草地研究不同类型藏羊的排粪量、有机物质消化率和放牧采食量,旨在为该地区放牧藏羊的科学饲养与管理提供理论依据。

关键词: 高寒草地, 藏系绵羊, 放牧采食量, TiO2 外源指示剂, 排粪量, 有机物质消化率

Abstract: Feed intake is an important factor affecting the production performance of grazing livestock and plays an important role in determining outcomes in grassland ecosystems. This research compared groups of 4 sheep of differing age and sex (lamb, 1-, 2-, 3-, and 4-year-old ewes, wethers and stud stock, of Oula, Ganjia and Qiaoke types of Tibetan sheep). For these 21 groups of sheep, the feces output and organic matter digestibility were measured using the TiO2 inert marker method and fecal nitrogen index method respectively in order to calculate grazing intake. The correlations between the various feed nutritive value, intake and digestibility data were also evaluated. The results showed that the average grazing intake of Oula, Qiaoke and Ganjia Tibetan sheep was 1032, 835 and 956 g·d-1, respectively. Although the grazing intake of Qiaoke Tibetan sheep was significantly lower than that of Oula and Ganjia types (P<0.05), there was no significant difference among the three Tibetan sheep types in grazing intake per kg metabolic body weight or in the ratio of dry matter intake to body weight (P>0.05). The average organic matter digestibility of the Xiahe pasture when consumed by Oula, Qiaoke and Ganjia types of Tibetan sheep was 51%, 47% and 56%, respectively, and their average feces output was 561, 484 and 467 g·d-1, respectively, with the difference in excretion of Oula Tibetan sheep being significantly higher than the values for the other two types of Tibetan sheep. The defecation, organic matter digestibility and grazing intake of the different types of Tibetan sheep were studied while grazing natural pasture in an alpine region in order to provide a sound scientific basis for the husbandry and management of Tibetan sheep.

Key words: alpine meadow, Tibetan sheep, grazing feed intake, TiO2 inert marker, feces excretion, organic matter digestibility