摘要
文章旨在研究高粱日粮对肉鸭生长性能、血清生化指标及肠道微生物的影响.试验将 1200 羽健康的 1 日龄樱桃谷公鸭随机分为4组,每组10个重复,每个重复40只.各组分别饲喂添加0%、3%、6%、12%高粱的对照组(Ctr)、试验Ⅰ、Ⅱ和Ⅲ组日粮,试验为期 35 d.试验结果:试验Ⅲ组肉鸭末重比对照组显著降低 8.08%(P＜0.05),试验Ⅱ和Ⅲ组肉鸭平均日增重比对照组分别显著降低 5.52%和 8.30%(P＜0.05),试验Ⅲ组肉鸭料肉比较对照组显著下降7.79%(P＜0.05);此外,各组采食量无显著差异(P＞0.05).Ⅱ和Ⅲ组肉鸭血清总蛋白(TP)和甲状腺素(T4)含量显著降低(P＜0.05),碱性磷酸酶(ALP)和谷丙转氨酶(ALT)活性显著提高(P＜0.05),Ⅱ组肉鸭血清谷草转氨酶(AST)活性显著降低(P＜0.05),Ⅲ组肉鸭血清总抗氧化能力(T-AOC)活性显著降低(P＜0.05);各组间肉鸭血清白蛋白(Alb)、钙(Ca)、磷(P)补体C3(C3)、补体C4(C4)及丙二醛(MDA)含量无显著差异(P＞0.05).与其他各组相比,Ⅲ组肉鸭盲肠大肠杆菌和枯草芽孢杆菌含量显著提高(P＜0.05),各组间肉鸭盲肠沙门氏菌、乳酸菌和丁酸梭菌含量无显著差异(P＞0.05).结论:过量(12%)添加高粱对肉鸭生长发育有一定负面影响,其机制可能与高粱对其肠道及内脏损伤相关.
Abstract
The effect of sorghum diet on the growth performance,serum biochemical indicators,and gut microbiota of meat ducks.1200 healthy 1-day-old Cherry Valley male ducks were randomly divided into 4 groups,with 10 replicates in each group and 40 ducks per replicate.The control group(Ctr)and experimental groups Ⅰ,Ⅱ,and Ⅲ were fed with diets supplemented with 0%,3%,6%,and 12%sorghum,respectively,for a total of 35 days.The results showed that the final weight of experimental group Ⅲ meat ducks was significantly lower than that of the control group by 8.08%(P＜0.05).The average daily weight gain of experimental group Ⅱ and Ⅲ meat ducks was significantly lower than that of the control group by 5.52%and 8.30%,respectively(P＜0.05).The feed meat of experimental group Ⅲ meat ducks was significantly reduced by 7.79%compared to the control group(P＜0.05);In addition,there was no significant difference in feed intake between the groups(P＞0.05).The serum TP and T4 levels in groups Ⅱ and Ⅲ meat ducks were significantly reduced(P＜0.05),while ALP and ALT activities were significantly increased(P＜0.05).The serum AST activity in group Ⅱ meat ducks was significantly reduced(P＜0.05),and the serum T-AOC activity in group Ⅲ meat ducks was significantly reduced(P＜0.05);There were no significant differences in serum Alb,Ca,P,C3,C4,and MDA levels among the groups of meat ducks(P＞0.05).The content of Escherichia coli and Bacillus subtilis in the cecum of meat ducks significantly increased(P＜0.05),while the content of Salmonella,Lactobacillus,and Clostridium butyricum in the cecum of meat ducks did not show significant differences among the groups(P＞0.05).(Experimental conclusion)Excessive(12%)addition of sorghum has a certain negative impact on the growth and development of meat ducks,and its mechanism may be related to the damaging effect of sorghum on their intestines and internal organs.
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