动物营养学报2016，Vol.28Issue(9)：2943-2952,10.DOI:10.3969/j.issn.1006-267x.2016.09.034
杜湖杂交 F1代母羊妊娠期能量和蛋白质维持需要量
Energy and Protein Requirements for Maintenance of Doper Sheep and Hu Sheep Hybrid F1 Ewes during Pregnancy
摘要
Abstract
The aim of this study was to determine the energy and protein requirements for maintenance of Dor-per and Hu hybrid F1 ewes during pregnancy and to provide data for formulating diet for the mutton sheep. The experiment consisted of feeding experiment, digestion metabolism experiment and respirometary experiment. Fifteen sheep with body weight of (43.34±1.37) kg at the age of nine months were used. After the treatments of synchronization of estrus and free mating, the sheep were assigned randomly into three groups with five e-wes in each group, which were ad libitum ( Ad) group, 70% Ad group and 50% Ad group. Feces and urine were collected using total feces collection method on 40, 100 and 130 days of pregnancy;meanwhile, respiro-metary experiment was conducted, and metabolic parameters of nitrogen and energy at different periods of pregnancy were calculated;finally the requirements of net nitrogen, net energy and metabolic energy for main-tenance of the cross combination during pregnancy were calculated by establishing the allometric regressions re-spectively between nitrogen intake and nitrogen retention, the logarithm of heat production and metabolizable energy intake according to the results of digestion metabolism experiment and respirometary experiment. The re-sults showed as follows:1) the apparent digestibility of nitrogen on 40, 100 and 130 days of pregnancy were 56.16% to 62.24%, 60.43% to 65.47% and 58.79% to 62.01%, respectively. 2) The apparent digestibility of gross energy on 40, 100 and 130 days of pregnancy were 51. 18% to 64. 25%, 60. 86% to 66. 17%, and 63.20%~67.36%, respectively. 3) Requirements of net nitrogen, net energy and metabolic energy for mainte-nance of this breed on 40, 100 and 130 days of pregnancy were 287.9, 301.3 and 430.7 mg/(kg W0.75·d), 194.01, 244.59 and 256.08 kJ/(kg W0.75·d), and 283.18, 412.26 and 468.56 kJ/(kg W0.75·d), respec-tively. The research defines the energy and protein requirement parameters for Dorper sheep and Hu sheep hy-brid F1 ewes during pregnancy, including net energy, metabolizable energy and net nitrogen for maintenance.关键词
妊娠期/杜湖杂交F1代母羊/能量/蛋白质/需要量Key words
pregnant period/Dorper sheep and Hu sheep hybrid F1 ewe/energy/protein/requirement分类
农业科技引用本文复制引用
马铁伟,聂海涛,张浩,纪宇,王震,邓凯平,王锋..杜湖杂交 F1代母羊妊娠期能量和蛋白质维持需要量[J].动物营养学报,2016,28(9):2943-2952,10.基金项目
国家现代肉羊产业体系项目( CARS-39) （ CARS-39）
