本文選題：母羊 + 哺乳期��； 參考：《河北農(nóng)業(yè)大學(xué)》2015年碩士論文

【摘要】：本試驗(yàn)采用隨機(jī)區(qū)組設(shè)計將15只道寒雜交哺乳母羊按體重分為3組,自由采食組、80%限飼組和60%限飼組,每組5只羊。分別在哺乳期第15、45和75 d時進(jìn)行消化代謝試驗(yàn)和氣體代謝試驗(yàn),研究哺乳母羊能量和蛋白質(zhì)的代謝規(guī)律及需要量。獲得了在本試驗(yàn)條件下道寒雜交母羊哺乳期能量和蛋白質(zhì)需要量的析因模型。研究結(jié)果表明:1.隨著飼喂水平的降低,道寒雜交哺乳母羊干物質(zhì)采食量、糞排出量、食入氮、糞氮、食入碳、糞碳、消化碳、食入總能、糞能、尿能、消化能、代謝能、代謝體重和干物質(zhì)采食量/代謝體重均呈下降趨勢,且自由采食組均顯著高于60%限飼組(P0.05);隨飼喂水平的降低,氮表觀消化率、碳表觀消化率、總能消化率、耗氧量/代謝體重和CO2排出量/代謝體重有升高趨勢;隨哺乳時間的增加,乳氮和乳碳呈下降的趨勢,且在哺乳前期時顯著高于哺乳后期(P0.05)。2.道寒雜交母羊哺乳前期、中期和后期維持凈能需要量分別為226.14、223.83和221.72 k J/kg W0.75·d,維持代謝能需要量分別為327.06、318.15和303.77k J/kg W0.75·d,代謝能的維持利用效率分別為0.691、0.704和0.730;道寒雜交母羊哺乳前期、中期和后期維持凈蛋白需要量為2.25、2.01和1.76 g/kg W0.75·d。3.道寒雜交母羊哺乳期凈能(NER)、代謝能(MER)和凈蛋白質(zhì)(NPR)總需要量解析模型分別為:凈能總需要量的析因模型:哺乳前期:NER=226.14 k J/kg W0.75·d+NEg;log10ER=3.1206+0.4658log10BW哺乳中期:NER=223.83 k J/kg W0.75·d+NEg;log10ER=3.0815+0.4602log10BW哺乳后期:NER=221.72 k J/kg W0.75·d+NEg;log10ER=2.8349+0.5594log10BW代謝能總需要量的析因模型:MER=327.06 k J/kg W0.75·d +NEg/0.7327;log10ER=3.1206+0.4658log10BWMER=318.15 k J/kg W0.75·d +NEg/0.7591;log10ER=3.0815+0.4602log10BWMER=303.77 k J/kg W0.75·d +NEg/0.8317;log10ER=2.8349+0.5594log10BW凈蛋白質(zhì)總需要量的析因模型為:哺乳前期:NPR=2.25g/kg W0.75·d+Npg;log10NR=-2.7775+2.2807log10BW;NR=-9.6915+0.0925NPg哺乳中期:NPR=2.01 g/kg W0.75·d+Npg;log10NR=-2.0667+1.851log10BW;NR=-9.8755+0.094NPg哺乳后期:NPR=1.76 g/kg W0.75·d+Npg;log10NR=-1.4648+1.4933log10BW;NR=-11.775+0.0961NPg4.提出了哺乳母羊能量和蛋白質(zhì)需要量參數(shù)。
[Abstract]:In this experiment, 15 crossing lactating ewe were divided into 3 groups according to their body weight by random block design. The free feeding group was divided into three groups: the free feeding group (80%) and the 60% (60%) group, with 5 sheep in each group. Digestion and metabolism tests and gas metabolism tests were carried out at 1545 and 75 days during lactation to study the metabolic rules and requirements of energy and protein in lactating ewe. A factorial model of energy and protein requirement in lactating period of Dahan crossbred ewes was obtained. The results of the study show that 1: 1. With the decrease of feeding level, dry matter intake, fecal excretion, nitrogen intake, fecal nitrogen intake, carbon intake, fecal carbon, digesting carbon, total energy intake, fecal energy, urination energy, digestibility energy, metabolic energy, fecal energy, nitrogen intake, fecal nitrogen intake, total energy intake, fecal energy, urine energy, digestibility energy, metabolic energy, The metabolic body weight and dry matter intake / metabolic weight showed a downward trend, and the free feed intake group was significantly higher than 60% restricted feed group P0.05, with the decrease of feed level, the apparent nitrogen digestibility, carbon apparent digestibility, total energy digestibility, nitrogen apparent digestibility, carbon apparent digestibility, total energy digestibility, Oxygen consumption / metabolic weight and CO2 excretion / metabolic weight increased, and with the increase of lactation time, milk nitrogen and milk carbon showed a decreasing trend, and at the early stage of lactation, it was significantly higher than that in late lactation period (P0.05 路2). The maintenance net energy requirements of Dahan crossbred ewe were 226.14223.83 and 221.72 k J/kg W0.75d, 327.06318.15 and 303.77k J/kg W0.75d, respectively, and the maintenance and utilization efficiency of metabolic energy were 0.691 0.704 and 0.730, respectively. The net protein requirements were 2.25 g/kg 2.01 and 1.76 g/kg W0.75 d.3. The analytical models of total net energy requirement (NERN) and net protein (NPR) of Daohan crossbred ewe during lactation are as follows: the factorial model of net energy requirement is 226.14 k J/kg W0.75 d before lactation: Negg log 10 ERN 3.1206 0.4658log10BW mid lactation: 223.83 k J/kg W 0.75 d NEglog 10 ERT 3.0815 0.4602log10BW later stage of lactation. :NER=221.72 k J/kg W0.75路d NEg;log10ER=2.8349 0.5594log10BW浠ｈ阿鑳芥，

本文編號：1806695