四种植物提取物对肉鸡生长性能、肠道及排泄物生化指标的影响

Effects of Four Plant Extracts on Growth Performance of Broilers and Biochemical Indicators of Intestinal Contents and Excreta

观察比较了樟科(CFPE)、丝兰(YE)、一串红(SS)和桂花(OFL)植物提取物对肉鸡生产性能、肠道和排泄物生化指标的影响。将300只0日龄AA肉鸡随机分为5组:即肉桂、丝兰、一串红和桂花提取物各添加200 mg/kg为试验组,以基础日粮为对照组。每个试验组3次重复,每重复20只。结果表明,与对照组相比,各试验组均可显著提高日增重,降低料肉比(P<0.05),显著改善肉鸡肠道内容物和排泄物的生化指标(P<0.05):氨态氮、尿素氮、尿酸含量及脲酶活性较对照组呈下降趋势;同时抑制了产脲酶、尿酸酶、尿囊素酶菌以及一些肠道有害细菌的生长,直接抑制粪中尿酸酶活性,从而有效地减少了氨气的逸放,降低其对肉鸡的应激,进而生长性能各项指标都有了改善。

The study was conducted to compare the effects of extracts from cinnamon（CFPE）,yucca（YE）,red sage（SS） and Osmanthus fragrans（OFL） on growth performance of broiler chicks and the biochemical indicators of intestinal contents and excreta.A total of 300 zero-day-old AA broiler chicks were randomly divided into five groups with three replicates.The experimental groups were provided the diet with the addition of 200 mg/kg plant extracts respectively,while the control group was provided basal diet.The results showed that compared with the control,adding plant extracts could significantly improve the average daily mass gain,reduce the average feed-weight ratio（P0.05）,and improve the biochemical indicators of intestinal contents and excreta.The concentration of ammonia nitrogen,urea nitrogen and uric acid and the activity of urease in intestinal contents and excreta showed decreasing trends;at the same time,the growth of the microbes generating urease and uricase in intestinal tract and the activity of uricase in excreta were inhibited,so the ammonia discharge and its effect on broiler chicks were decreased,and then the growth performance was improved.