本试验旨在研究5～11周龄金定蛋鸭实用日粮中氯化钠的添加量。试验采用玉米～豆粕型基础日粮（含钠0.037%，氯0.047%，钾0.710%），分别添加0、0.16%、0.20%、0.24%、0.28%、0.32%、0.48%和0.96%的氯化钠组成8种试验日粮。试验选用960只5周龄健康金定蛋鸭，按体重均匀分成8个组，每个组设10个重复，每个重复12只鸭。试验期为7周。结果显示，氯化钠添加水平对生长蛋鸭日增重、采食量及料重比影响显著（P＜0.05）；蛋鸭血清CO2浓度和pH各组间差异不显著（P＞0.05），但随着氯化钠添加量的增加而呈现下降的趋势。血清中碳酸氢根离子浓度随着氯化钠添加量的增加而下降，对照组的阴离子间隙显著低于0.20%-0.96%组（P＜0.05）；渗透压随着氯化钠添加量的增加而升高，对照组与0.96%组差异显著（P＜0.05）；钠和氯对生长蛋鸭血清甘油三酯和总胆固醇的影响差异不显著（P＞0.05），对血清尿素氮和葡萄糖的浓度影响显著（P＜0.05）。因此，在玉米-豆粕型日粮中添加0.24%氯化钠，使日粮钠和氯的含量分别为0.131%和0.193%，可满足5～11周龄金定蛋鸭的生长和生理需要。

This study was designed to evaluate the requirements of sodium and chlorine for Jinding laying ducks aged from 5 to 11 weeks. Nine hundred and sixty Jinding ducks were chosen and randomly divided into 8 groups according to the body weight with 10 replicates of 12 ducks per replicate which were fed diets with sodium chloride of 0, 0.16%, 0.20%, 0.24%, 0.28%, 0.32%, 0.48% and 0.96% in the basal diet (contained 0.037% sodium, 0.047% chlorine and 0.710% kalium), respectively. The trial lasted for 7 weeks. The results showed that sodium chloride significantly affected average daily weight gain (ADG), average daily feed intake (ADFI) and the ratio of feed to gain (F/G) of growth laying ducks (P<0.05). The contents of CO2 and pH in serum were decreased as the supplemental level of sodium chloride increased (P>0.05). The content of bicarbonate ion was decreased as the supplemental level of sodium chloride increased. The anion gap was lower when supplemented with 0 sodium chloride than that supplemented with 0.20%-0.96% sodium chloride (P<0.05). The osmotic pressure was increased as the level of sodium chloride increased and there were significantly differences between 0 and 0.96% sodium chloride adding groups. The sodium and chlorine had no significant effect on the content of triglyceride and total cholesterol (P>0.05), but significantly affected the contents of urea nitrogen and glucose in serum (P<0.05). It was concluded that the diet supplemented with 0.24% sodium chloride which contained 0.131% sodium and 0.193% chlorine could meet the requirement of 5 to 11 weeks Jinding laying ducks in production.［Chinese Journal of Animal Nutrition, 2010，22（2）:460-465］