饮水中添加二甲酸钾对土杂鸡生产性能、免疫功能和抗氧化能力的影响

Effects of Potassium Dicarboxylate in Drinking Water on Production Performance,Immune Function and Antioxidant Capacity of Native Hybrid Chickens

该试验旨在研究饮水中添加二甲酸钾对土杂鸡生产性能、免疫功能和抗氧化能力的影响。试验选取1日龄体重相近、健康的公土杂鸡480只,随机分为4个组,每组6个重复,每个重复20只鸡,对照组正常饮水,试验1、2、3组分别在饮水中添加350、550、750mg/L二甲酸钾,试验期54d。结果表明:(1)各试验组与对照组在平均日采食量、平均日增重、料重比、免疫器官指数等指标均无显著影响(P>0.05)。(2)饮水中添加不同剂量的二甲酸钾均能显著提高鸡十二指肠、空肠、回肠的绒毛高度(P<0.05),试验1、3组可显著提高鸡十二指肠的隐窝深度(P<0.05)。与对照组相比,试验1组可显著提高回肠的肠绒毛高度/隐窝深度值,试验2组可显著提高十二指肠和空肠和的肠绒毛高度/隐窝深度值(P<0.05);与对照组相比,试验1、2组均能显著提高鸡血清总蛋白浓度、免疫球蛋白A、免疫球蛋白G(P<0.05),试验2、3组均能显著提高鸡血清白蛋白浓度、鸡肿瘤坏死因子-α浓度、白细胞介素-6(P<0.05)。(3)与对照组相比,试验2、3组显著提高鸡DPPH自由基清除能力(P<0.05),极显著提高鸡SOD活力、抑制羟自由基能力(P<0.01)。综上,在饮水中添加二甲酸钾对土杂鸡的生产性能无影响,但可提高鸡免疫功能和抗氧化能力,其中以添加550mg/L效果较好。

This experiment was conducted to study the effects of potassium formate in drinking water on production performance,immune function,and antioxidant capacity of local hybrid chickens.A total of 480 one-day-old healthy hybrid chickens with similar body weight were selected and randomly divided into 4 groups with 6 replicates in each group and 20 chickens in each replicate.The control group was given normal drinking water,and the experimental groups 1,2,and 3 were supplemented with 350,550 and 750 mg/L potassium diformate in drinking water,respectively.The experiment lasted for 54 days.The results showed that:①There was no significant difference in average daily feed intake,average daily gain,feed-to-gain ratio,and immune organ index between the experimental groups and the control group(>0.05).②Adding different doses of potassium formate in drinking water could significantly increase the villus height of the duodenum,jejunum,and ileum of chickens(<0.05),and groups 1 and 3 could significantly increase the crypt depth of the duodenum of chickens(<0.05).Compared with the control group,the intestinal villus height/crypt depth value of the ileum was significantly increased in experimental group 1,and the intestinal villus height/crypt depth value of the duodenum and jejunum was significantly increased in experimental group 2(<0.05).Compared with the control group,the serum total protein concentration,immunoglobulin A,and immunoglobulin G were significantly increased in the experimental groups 1 and 2(<0.05).The serum albumin concentration,tumor necrosis factor-αconcentration,and interleukin-6 were significantly increased in the experimental groups 2 and 3(<0.05).③Compared with the control group,experimental groups 2 and 3 significantly increased the DPPH free radical scavenging ability of chickens(<0.05),significantly increased the SOD activity,and inhibited the hydroxyl radical ability of chickens(<0.01).In conclusion,the the addition of potassium formate in drinking water had no effect on the production performance of local hybrid chickens,but it could improve the immune function and antioxidant capacity of chickens,and the effect of adding 550 mg/L was better.