摘要
试验选用12头初始体重为（15．33±2．10）kg健康杜X长×大杂交去势公猪，分为6个处理，采用6×6双拉丁方设计，研究低蛋白日粮条件下赖氨酸水平对生长猪氮平衡和生长性能的影响。试验日粮包括1个高蛋白对照组（粗蛋白水平为18％，标准可消化赖氨酸0．83％）和5个低蛋白处理组（粗蛋白水平为14％，标准可消化赖氨酸水平分别为0．63％、0．73％、0．83％、0．93％和1．03％）。结果表明：日粮粗蛋白水平降低4％后，生长猪的氮排放量显著降低（P〈0．01），氮沉积率和生物学价值随着日粮赖氨酸水平的升高呈线性上升（P〈0．01）；日粮粗蛋白和赖氨酸水平对生长猪的生长性能并无显著影响（P〉o．05）。综合考虑日粮标准可消化赖氨酸水平对生长猪氮平衡和生长性能这两方面的影响，当日粮粗蛋白水平较《猪饲养标准》（2004）的推荐标准降低4％时，15-40kg生长猪最适日粮标准回肠可消化赖氨酸水平为0．93％-1．03％。
One metabolism experiment was conducted to evaluate the optimal standard ileal digestible （SID） lysine level for growing pigs. Twelve crossbred barrows （Duroc× Yorkshire ×Landrace） were used in this experiment. The barrows were weighed and allocated to six dietary treatments in a repeated 6 - 6 Latin Square design. Experimental diets concluded a standard, 18% crude protein （CP）, corn-soybean meal control diet （0.83% of SID lysine） and five low-CP （14% CP） diets （0.63%, 0.73%, 0.83%, 0.93%, and 1.03% of SID lysine）. The results showed that N excretion decreased significantly when dietary CP level reduced by 4% （P 〈 0.05）, N retention rate and N Biovalue increased with the increasing of dietary SID lysine level （linear, P 〈 0.05）. The maximum N retention rate and N Biovalue were obtained when dietary SID lysine level was 1.03%. Growth performance was not influenced by dietary CP and SID lysine levels. This experiment suggested the optimal SID lysine level for 15 - 40 kg growing pigs fed low-CP is 0.93% -1.03%.
出处
《中国畜牧杂志》
CAS
北大核心
2011年第5期34-38,共5页
Chinese Journal of Animal Science
基金
国家科技支撑计划资助课题(2006BAD12B02)
关键词
低蛋白日粮
赖氨酸
氮平衡
生长性能
生长猪
low protein diet
lysine
N balance
growth performance
growing pigs
