日粮添加矿源性黄腐酸对肉鸭生产性能和生化指标的影响

Effects of Dietary Fulvic Acid on the Performance of Ducks and the Biochemical Index

[目的]研究矿源性黄腐酸(Fulvic acid,FA)对肉鸭生产性能的影响。[方法]选取1日龄樱桃谷肉鸭480只,采用单因素试验设计,随机分为4组,对照组、试验组Ⅰ、试验组Ⅱ、试验组Ⅲ分别饲喂含0、0.25‰、0.50‰和0.75‰的矿源性FA的玉米-豆粕型饲粮,研究矿源性黄腐酸对肉鸭生产性能的影响。[结果]饲粮添加不同比例的FA对肉鸭全试验期的体重、增重、采食量和料重比没有显著影响(P<0.05),但对个别周龄的体重、采食量和料重比有显著的影响(P>0.05);FA对血清总蛋白浓度没有显著影响(P>0.05),试验组Ⅱ和试验组Ⅲ尿素氮浓度显著大于其他2组(P<0.05),尿酸浓度随着饲粮中FA含量的增加而显著增加(P<0.05),而试验组Ⅰ尿酸浓度显著低于其他组(P<0.05);FA对粪中的尿素氮和尿酸含量有显著影响(P<0.05),随着肉鸭日粮FA含量的增加,排泄物中尿酸和尿素氮的含量显著降低(P<0.05)。[结论]肉鸭饲粮中添加黄腐酸钾能够提高饲料氮的利用率,生产中肉鸭饲粮中的FA含量以0.75‰为宜。

[Objective] The aim was to study the effects of ore-derived fulvic acid on production performance of meat duck.[Method] 1-day-old Cherry Valley duck 480, were randomly divided into four groups（control group, test groupⅠ, test group Ⅱand test group Ⅲ）, fed the corn-soybean meal diets, each containing 0‰, 0.25‰ , 0.50‰ and 0.75‰ of ore-derived fulvic acid.Effects of dietary fulvic acid on the production performance of meat ducks were studied.[Result]Adding different proportions of fulvic acid, duck weight, weight gain, feed in-take and feed conversion ratio had no significant effect （P〈0.05）, but had a significant impact on the individual week-old （P＆gt;0.05）;Diet-ary fulvic acid had no significant effect on total protein concentration of duck serum （P＆gt;0.05）, blood urea nitrogen concentration of 0.5‰and 0.75‰ group was significantly larger than the other two groups （P〈0.05）, uric acid concentration increased significantly along with the fulvic acid concentration in the diet （P〈0.05）, but 0.25‰ group was significantly lower than other groups （P〈0.05）; Fulvic acid had a significant influence （P〈0.05） on urea nitrogen and uric acid in manure, uric acid and urea nitrogen excretion was significantly reduced （ P〈0 .05）, along with increasing dietary fulvic acid content.[Conclusion] Dietary fulvic acid can improve feed utilization of nitrogen.In terms of improving the feed efficiency, adding 0.75‰ fulvic acid is preferably in duck diet.