【摘要】 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。更多还原

【Abstract】 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.更多还原