动物营养学报2017，Vol.29Issue(11)：3912-3920,9.DOI:10.3969/j.issn.1006-267x.2017.11.011
20~35kg杜泊羊×湖羊F1代公羔常量元素维持和生长需要量
Macroelement Requirements for Maintenance and Growth of Dorper×Hu F1 Male Lambs Weighted 20 to 35 kg
摘要
Abstract
A comparative slaughter trial was conducted to estimate the macroelement [ calcium ( Ca ) , phos-phor ( P) , potassium ( K) , sodium ( Na) and magnesium ( Mg) ] requirements for maintenance and growth of Dorper×Hu F1 male lambs weighted 20 to 35 kg. Thirty-five male lambs [ initial body weight ( BW) was (19.20±0.36) kg] were used as experimental animals. Seven lambs were randomly chosen and slaughtered at about 20 kg BW for measuring initial body macroelement contents. Another seven lambs were also randomly chosen and offered a pelleted mixed diet ad libitum ( AL) and slaughtered at about 28 kg BW. The remaining 21 lambs were randomly allocated to 3 groups, which were AL, 70%AL and 40%AL groups, each group had 7 lambs. All lambs were slaughtered when lambs in AL group reached approximately 35 kg BW. Macroelement contents of empty body ( head+feet, hide, internal organs+blood, and carcass) of lambs were determined. The results showed as follows:at 20 to 35 kg BW, Ca P, Na, K and Mg requirements for maintenance [ based on empty body weight ( EBW ) ] of Dorper × Hu F1 male lambs were 24. 01, 11. 70, 3. 20, 6. 60 and 1.20 mg/kg EBW, and those for growth [ based on empty body weight gain ( EBWG ) ] were 11. 55 to 11.41 g/kg EBWG, 5.82 to 5.77 g/kg EBWG, 1.47 to 1.69 g/kg EBWG, 0.42 to 0.44 g/kg EBWG, and 0.98 to 0.88 g/kg EBWG. In conclusion, the determination of macroelement requirements may help to formu-late more balanced diets for Dorper×Hu male lambs in the growth phase of 20 to 35 kg BW and improvement of growth performance of lambs.关键词
比较屠宰法/杜泊羊×湖羊F1代公羔/维持需要量/生长需要量/常量元素Key words
comparative slaughter method/Dorper×Hu F1 male lambs/maintenance requirement/growth re-quirement/macroelement分类
农业科技引用本文复制引用
张浩,郭爽,张冰洁,张知之,曹越,陈逸飞,王锋..20~35kg杜泊羊×湖羊F1代公羔常量元素维持和生长需要量[J].动物营养学报,2017,29(11):3912-3920,9.基金项目
江苏省自然科学基金青年基金项目(BK20170488) （BK20170488）
扬州大学科研启动项目(137011065) （137011065）
中国博士后科学基金面上资助(2017M610358) （2017M610358）
