摘要
Two assays run simultaneously to evaluate the levels of metabolizable energy (ME) and digestible lysine (LYS) for growing pigs from specific strain on sanitary isolation conditions. Seventy-two castrated males averaging 23.34 ± 1.62 kg and 72 gilts averaging 21.56 ± 2.86 kg were assigned to a randomized blocks design with a 2 x 3 factorial arrangement and six replications of two animals per experimental unit. The treatments consisted of the combination of energy (3,270 and 3,500 kcal of ME/kg) and lysine levels (0.83, 1.03, and 1.23% digestible). No interaction of energy x protein levels was observed, although effects of the main factors on performance variables were detected. Castrated males showed linear increase of weight gain and quadractic of feed intake and feed:gain ratio, as the dietary lysine levels increased. Linear decrease on feed: gain ratio in response to the dietary lysine concentration was noticed for gilts. Castrated males and gilts in the growing phase on sanitary isolation conditions and healthy conditions showed positive response to the dietary digestible lysine increase. Effects of dietary lysine levels on performance of castrated males did not depend on the energy levels. Gilts fed diets with 3,500 kcal of ME/kg showed the best feed:gain ratio, that confirmed the greatest results of nutrient efficiency utilization in relation to the castrated males.
摘要译文
两个实验同时运行，以评估代谢能（ME）和可消化赖氨酸（LYS）的水平生长猪从具体的压力卫生隔离的条件。七十二个阉割男性平均23.34±1.62公斤，72母猪平均21.56±2。86千克被分配到一个随机的块设计，一个2×3因子安排和每个实验单位两种动物的6个重复。该处理包括能源的组合（3，270和3500千卡的ME / kg）和赖氨酸水平（0.83，1.03，和1.23％的可消化）。能量X蛋白水平没有互动观察，虽然检测对性能变量的主要因素的影响。阉割男性表现为体重增加和采食量和饲料的二次型线性增加：增益比，随着日粮赖氨酸水平的提高。关于饲料线性下降：响应于膳食赖氨酸浓度增益比被注意对于小母猪。在成长阶段的卫生隔离条件和健康状况阉割男性和母猪表现为饮食可消化赖氨酸增长的积极响应。在阉割雄性的性能日粮赖氨酸水平的效果不依赖于能量水平。母猪饲喂3500千卡ME / kg时的最佳饲料：增重比，该确认的养分利用效率最大的结果相对于阉割男性。
TRINDADE NETO, Messias Alves da. Metabolizable energy and digestible lysine for pigs in the growing fhase on sanitary segregation conditions[J]. Revista Brasileira de Zootecnia, 2005,34(6): 1980-1989