日粮中不同粗蛋白水平对产蛋期绍鸭产蛋性能的影响

Effect of different crude protein levels in the diets on laying egg performance of laying Shaoxing ducks

采用3种不同蛋白质水平(产蛋率<80%:18%,16%,14%;产蛋率>80%:20%,18%,16%)的等能日粮(11.29 MJ/kg)对绍鸭进行饲养试验和氮平衡试验。在供试日粮蛋白质水平下,日粮粗蛋白水平对绍鸭体重、采食量及产蛋性能均没有显著影响(P>0.05);蛋重与日粮蛋白质水平呈正相关(r2=0.685);产蛋率以低蛋白组较高;总产蛋量3组间没有显著差异(P>0.05)。

A grouped feeding trial and metabolism trials were conducted to determine the effect of three isoenergetic （11.29 MJ/kg） diet with different crude protein levels （〈 80% laying： 18%, 16%, 14%; 〉 80% laying： 20%, 18%, 16%） on body weights, feed intake, feed nitrogen utilization rotes, and egg laying performance of laying Shaoxing ducks. There were no significant difference in body weights, feed intake, N retention rates, laying ratio and total egg production among the ducks received different crude protein levels in the diets. The mean egg weight was positively correlated with different crude protein levels （r^2 = 0.685）.