可消化赖氨酸水平对生长肥育猪生长性能和血清生化指标的影响  

Effects of Digestible Lysine on Growth Performance and Serum Biochemical Parameters in Growing-finishing Pigs

作　　者：杨峰[1] 燕富永[1] 张宇喆[1] 孔祥峰[2] 印遇龙[2] 黄瑞林[2] 李铁军[2] 高碧 舒绪刚 

机构地区：[1]华中农业大学动物科技学院,武汉430070 [2]中国科学院亚热带农业生态研究所动物生态营养与健康养殖联合实验室/农业生态工程重点实验室,长沙410125 [3]广州天科科技有限公司,广州510627

出　　处：《华中农业大学学报》2008年第2期258-262,共5页Journal of Huazhong Agricultural University

基　　金：农业科技成果转化基金项目(2006GB24910468);湖南省重大科技专项(2007FJ1003);国家“973”项目(2004CB117502);广东省科委项目(2006B200330005);广州市农业科技项目;国家“十一五”支撑计划项目(2006BAD12B07-6,2006BAD12B02-5-2)资助

摘　　要：选用80头体重为40kg左右的杜×（长×大）三元杂交猪,随机分为5个处理,每个处理公、母各半,分别饲喂可消化赖氨酸（DLys）水平为0.59%、0.67%、0.75%、0.83%和0.91%的等能、等氨基酸模式的玉米-豆粕型日粮。通过测定其生长性能和血清生化指标的变化,确定生长肥育猪的最佳DLys水平。结果表明：生长肥育猪的平均日增重、料重比均随饲粮DLys水平的增加呈显著的二次曲线变化。当DLys水平分别为0.78%和0.80%时,平均日增重和料重比分别达到极大值（791.42g）和极小值（2.92）。当DLys水平为0.75%时,胰高血糖素、胰岛素、甲状腺素T3和T4浓度最高,血糖浓度最低。上述结果提示,40～70kg生长肥育猪的日粮适宜DLys、粗蛋白水平分别为0.78%、15.66%。A total of eighty Duroc （Landrace× Yorkshire） growing-finishing pigs with 40 kg of average body weight were used in this study to evaluate the effects of different digestible lysine （DLys） levels （0. 59% ,0. 67% ,0. 75% ,0. 83% ,0. 91%） on growth performance and serum biochemical parameters in order to determine the optimal DLys levels in growing-finishing pigs. The experimental diets were based on corn-soybean meal with isoenergy and the same amino acid pattern. The results showed that average daily gain （ADG） and feed/gain（F/G） changed with the elevated DLys levels quadratically. The established DLys requirement of growing-finishing pigs was not the same when using different evaluation index. The optimal DLys level was 0. 78% for hightest ADG （791.42 g）, and 0. 80% for lowest F/G （2.92）. The concentrations of glucagon,insulin,thyroxine T3 and T4 at 0. 75% of DLys level were higher,while glucose concentration was lower compared with the other groups （P 〈 0. 05）. These findings suggested that the optimal DLys and crude protein levels in growing-finishing pigs with 40 - 70 kg of body weight were 0. 78%, 15.66% ,respectively.

关 键 词：生长肥育猪 可消化赖氨酸 生长性能 血清生化指标 

分 类 号：S828.41[农业科学—畜牧学] S828.5[农业科学—畜牧兽医]