畜牧兽医学报 ›› 2018, Vol. 49 ›› Issue (1): 111-120.doi: 10.11843/j.issn.0366-6964.2018.01.013

• 营养与饲料 • 上一篇    下一篇

20~35 kg杜湖F1代母羔常量元素净维持和生长需要量的研究

张浩1,2*, 聂海涛3, 马铁伟3, 王子玉3, 王锋3   

  1. 1. 扬州大学动物科学与技术学院, 扬州 225009;
    2. 扬州大学农业和农副产品安全国际联合研究实验室, 扬州 225009;
    3. 南京农业大学江苏省肉羊产业工程技术中心, 南京 210095
  • 收稿日期:2017-05-23 出版日期:2018-01-23 发布日期:2018-01-23
  • 通讯作者: 张浩,E-mail:zhanghao_850220@126.com
  • 作者简介:张浩(1985-),男,安徽宿州人,讲师,博士,主要从事反刍动物营养研究
  • 基金资助:

    江苏省自然科学基金青年基金项目(BK20170488);中国博士后科学基金面上资助项目(2017M610358);扬州大学科研启动项目(137011065);苏北科技专项(BZ-HA2017008)

The Net Macromineral Requirements for Maintenance and Growth of Dorper×Hu Crossbred F1 Ewe Lambs from 20 to 35 kg

ZHANG Hao1,2*, NIE Hai-tao3, MA Tie-wei3, WANG Zi-yu3, WANG Feng3   

  1. 1. College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China;
    2. Joint International Research Laboratory of Agriculture & Agri-product Safety, Yangzhou University, Yangzhou 225009, China;
    3. Jiangsu Engineering Technology Research Center of Mutton Sheep & Goat Industry, Nanjing Agricultural University, Nanjing 210095, China
  • Received:2017-05-23 Online:2018-01-23 Published:2018-01-23

摘要:

旨在探讨20~35 kg杜湖杂交F1代母羔羊常量元素(Ca、P、Na、K和Mg)的净维持和生长需要量。选择35只母羔羊(初体重为(19.2±0.36)kg)用于本试验。随机选取7只羊(起始组BL),在大约20 kg时进行屠宰以测定常量元素体成分的初始值。另外7只羊随机选择(中间屠宰组IM),且饲喂全混合颗粒饲粮,自由采食,体重在大约28 kg时进行屠宰。剩余的21只羔羊随机分为3个组,分别为自由采食组(AL)、70% AL组和40% AL组,每组7只羊。当自由采食组体重大约为35 kg时,将这3组羔羊屠宰。屠宰后,测定空腹体常量元素含量(头+足、皮、内脏+血液和胴体)。本研究结果显示,在20~35 kg体重阶段,杜湖杂交羊F1代母羔的常量元素净维持需要量分别为每天每千克空腹体重(EBW):22.21 mg钙(Ca)、11.65 mg磷(P)、3.41 mg钠(Na)、6.92 mg钾(K)和1.23 mg镁(Mg)。母羔的净生长需要量分别为每千克空腹体增重(EBWG):11.93~11.68 g Ca、6.12~5.71 g P、1.34~1.24 g Na、1.58~1.63 g K和0.41~0.36 g Mg。20~35 kg杜湖F1代母羔羊常量元素净需要量的确定将有助于此生长阶段合理饲粮的配制和羔羊生产性能的提高。

Abstract:

This study was conducted to estimate the net macromineral requirements for maintenance and growth of Dorper×Hu crossbred F1 ewe lambs from 20 to 35 kg. Thirty-five ewe lambs were used (the initial body weight (BW) of (19.2±0.36) kg). Seven lambs were randomly chosen and slaughtered at 20 kg BW as the BL group for measuring initial body composition. Another 7 lambs were also randomly chosen and offered a pelleted mixed diet for ad libitum intake and slaughtered at 28 kg BW as the IM group. The remaining lambs (n=21) were allocated randomly to 3 groups (ad libitum intake group, 70% of the ad libitum intake group, 40% of the ad libitum intake group) with 7 lambs in each group. All lambs were slaughtered when the lambs in ad libitum intake group reached approximately 35 kg BW. The contents of macrominerals of empty bodies of the lambs (head+feet, hide, internal organs + blood and carcass) were weighed, ground, mixed, and subsampled for chemical analyses. The results showed that, in the growth phase from 20 to 35 kg BW, the daily net macromineral requirements for maintenance were 22.21 mg Ca, 11.65 mg P, 3.41 mg Na, 6.92 mg K and 1.23 mg Mg per kilogram empty BW (EBW) for ewes, the daily net macromineral requirements for growth were 11.93-11.68 g Ca, 6.12-5.71 g P, 1.34-1.24 g Na, 1.58-1.63 g K and 0.41-0.36 g Mg per kilogram EBW gain (EBWG) for ewes. These results for the nutritional requirements of macrominerals may help to formulate more balanced diets for Dorper×Hu ewe lambs in the growth phase from 20 to 35 kg BW.

中图分类号: