Lysine Requirement of Male White Pekin Ducklings from Seven to Twenty-one Days of Age

摘要: A dose-response experiment with five lysine levels (0.65, 0.80, 0.95, 1.10, and 1.25%) was conducted to evaluate the requirement of male White Pekin ducklings from 7 21 days age. Two hundred eighty, 7-day-old, were allocated 5 experimental treatments, each containing 8 replicate pens birds per pen. Feed water provided ad libitum At age, weight gain, feed intake, feed/gain, breast meat weight, yield relative body pen all measured. As dietary level increased, improved significantly (p<0.05). According broken-line regression analysis, age for 0.84, 0.90, 0.97, 0.98%, respectively. Considering that duck production is directed production, starter during this period suggested be 0.98%.