【摘要】：本研究以薩福克×阿勒泰雜交肉用綿羊為研究對象,研究其妊娠期和哺乳期對能量和蛋白質(zhì)的需要量,為我國肉羊飼養(yǎng)標準的制定提供理論基礎,從而為肉羊的高效養(yǎng)殖提供科學依據(jù)。選取15只健康的薩�？恕涟⒗仗┭螂s交母羊做同期發(fā)情和人工授精處理,妊娠檢查后按體重隨機分為3個處理組(自由采食組,80%限飼組和60%限飼組),每個處理5只母羊。在空懷期,妊娠第60天和100天,哺乳第20天和50天分別進行消化代謝試驗和呼吸測熱試驗。利用碳氮平衡法得出雜交母羊?qū)δ芰亢偷鞍踪|(zhì)的需要量。研究結(jié)果表明:1.隨著飼喂水平的降低,薩阿雜交母羊?qū)θ占Z干物質(zhì)和有機物消化率顯著升高(P0.05)。薩阿雜交母羊妊娠期和哺乳期對日糧DM、OM、NDF、ADF和能量的消化率顯著高于空懷期(P0.05)。2.母羊在空懷期,妊娠第60天和100天的可消化蛋白(DP)需要量與體增重(BWG)之間的線性方程如下:空懷期:DP(g/d)=1.130 BWG(g/d)+218.0(R2=0.8793,RMSE=27.896,n=12,P0.0001)妊娠60天:DP(g/d)=0.3983 BWG(g/d)+113.9(R2=0.8836,RMSE=13.958,n=15,P0.0001)妊娠100天:DP(g/d)=0.4657 BWG(g/d)+85.33(R2=0.8660,RMSE=19.529,n=12,P0.0001)3.母羊在空懷期,妊娠期和哺乳期的維持蛋白質(zhì)需要量(NPm)分別為3.569、2.594~4.263和3.419~4.581g/kg W0.75·d。4.母羊在空懷期,妊娠期和哺乳期的維持代謝能需要量(MEm)分別為292.72、259.83~307.03和363.54~371.40 k J/kg W0.75·d,維持凈能需要量(NEm)分別為132.98、58.94~173.58和67.51~114.16 kJ/kgW0.75·d。
[Abstract]:In this study, Suffolk 脳 Altay crossbred meat sheep were used to study the energy and protein requirements during pregnancy and lactation, which provided a theoretical basis for the formulation of raising standards for meat sheep in China. So as to provide scientific basis for efficient breeding of meat sheep. Fifteen healthy Suffolk 脳 Altay crossbred ewes were selected for simultaneous estrus and artificial insemination treatment. After pregnancy examination, they were randomly divided into 3 groups according to their body weight (free feeding group, 80% limited feeding group and 60% limited feeding group), each treated with 5 estrous estrus and artificial insemination group. Digestive metabolism test and respiratory calorimetry test were carried out on day 60 and day 100 of pregnancy and on day 20 and day 50 of lactation respectively. The energy and protein requirements of crossbred ewe were obtained by carbon and nitrogen balance method. The results of the study show that 1: 1. With the decrease of feed level, the digestibility of dry matter and organic matter increased significantly (P0.05). The digestibility of ADF and energy in dietary DMOMNDFN during gestation and lactation were significantly higher in Saa crossbred ewe than in empty pregnant period (P0.05). 姣嶇緤鍦ㄧ┖鎬，

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