摘要
利用氮平衡试验和饲养试验,研究了日粮不同粗蛋白(CP)水平(16.1%,14.3%,13.3%,12.4%和11.7%)对肥育猪生产性能、氮和能量平衡的影响。饲养试验选取体重约为(51.86±3.11)kg的杜×长×大三元杂交猪80头,随机分为5组,每组4个重复。平衡试验选取体重为(62.96±2.04)kg的杜×长×大三元杂交猪5头,按5×5拉丁方设计。结果表明,粪氮、尿氮、总氮、氮吸收和氮沉积均随日粮CP水平的降低而降低(P<0.01),而消化能(DE,%)和代谢能/总能(ME/GE,%)随日粮CP水平的降低而升高(P<0.05)。日粮CP水平显著影响了猪的生产性能和血清尿素氮浓度(P<0.05)。日粮中添加赖氨酸(Lys)、蛋氨酸(Met)和苏氨酸(Thr),可使肥育猪日粮CP水平从16.1%降低到13.3%,且大幅度降低氮排泄量而不影响其生产性能。
Two experiments were conducted with finishing pigs to determine the effects of crude protein (CP) levels on growth performance, N and energy balance. Dietary CP levels were 16.1%, 14.3%, 13.3%, 12.4%, or 11.7%. 80 three-line crossbred pigs(Duroc × Landrace × Yorkshine), with initial BW of (51.86 ± 3.11) kg, were allocated to five treatments. Each treatment was sixteen pigs with four repeats in a performance trial. Five barrows(Duroc × Landrace × Yorkshine), with initial BW of(62.96 ± 2.04)kg, were used according to a 5 × 5 Latin square design in a balance trial. Fecal, urinary, total N excretion, N absorption and N retention (g/d) decreased with decreasing dietary CP level (P〈 0.01). However, DE and ME/GE(%) increased with decreasing dietary CP level (P 〈 0.05). Dietary CP intake affected (P 〈 0.01) ADG, ADFI, feed efficiency, and plasma concentrations of urea N. Dietary protein concentration reduced from 16.1% to 13.3 % can dramatically reduce N excretion with little decrease in growth performance.
出处
《华北农学报》
CSCD
北大核心
2006年第B10期166-171,共6页
Acta Agriculturae Boreali-Sinica
基金
国家"973"项目(2004CB117502)
国家自然科学基金(30371038)
中科院知识创新重要方向项目(KSCXZ-SW-323)
关键词
氨基酸
粗蛋白
生产性能
肥育猪
Amino acids
Crude protein
Growth performance
Finishing pigs