畜牧兽医学报2018，Vol.49Issue(1)：111-120,10.DOI:10.11843/j.issn.0366-6964.2018.01.013
20～35kg杜湖F1代母羔常量元素净维持和生长需要量的研究
The Net Macromineral Requirements for Maintenance and Growth of Dorper× Hu Crossbred F1 Ewe Lambs from 20 to 35 kg
摘要
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.关键词
比较屠宰法/杜湖母羔羊/净维持需要/净生长需要/常量元素Key words
comparative slaughter/Dorper × Hu crossbred F1 ewe lambs/net maintenance requirement/net growth requirement/macromineral分类
农业科技引用本文复制引用
张浩,聂海涛,马铁伟,王子玉,王锋..20～35kg杜湖F1代母羔常量元素净维持和生长需要量的研究[J].畜牧兽医学报,2018,49(1):111-120,10.基金项目
江苏省自然科学基金青年基金项目(BK20170488) （BK20170488）
中国博士后科学基金面上资助项目(2017M610358) （2017M610358）
扬州大学科研启动项目(137011065) （137011065）
苏北科技专项(BZ-HA2017008) （BZ-HA2017008）
