摘要
为探究饲粮与饮水添加酸化剂在肉鸡生产中的不同使用效果,试验选用36720只肉鸡随机分成三个处理组,每个处理12240只鸡,饲养在三个标准肉鸡舍,分别为对照组、饮水添加酸化剂组、饲粮添加酸化剂组。结果表明:与对照组相比,饲粮与饮水添加酸化剂均能够降低肉鸡的死亡数(饲粮型降低12.85%,饮水型降低20.83%),增加鸡出栏体重(饲粮型增加1.61%,饮水型增加2.42%),降低料重比(饲粮型降低1.90%,饮水型降低3.16%),进而改善肉鸡生长性能。饲粮与饮水添加酸化剂对肉鸡屠宰性能无显著影响(P>0.05)。与对照组相比,饲粮与饮水添加酸化剂组肉鸡嗉囊pH分别降低11.09%、13.95%,腺胃pH降低25.60%、22.87%,肌胃pH降低8.83%、11.17%(P<0.05),饮水添加酸化剂组肉鸡十二指肠pH降低7.08%(P<0.05)。饲粮与饮水添加酸化剂组腺胃蛋白酶酶活较对照组分别提高20.00%、28.84%,肌胃蛋白酶酶活提高37.03%、56.41%(P<0.05),饮水添加酸化剂组肉鸡十二指肠蛋白酶酶活较对照组提高12.08%、空肠蛋白酶酶活提高10.21%(P<0.05)。饮水添加酸化剂组肉鸡盲肠内大肠杆菌数较对照组降低14.42%(P<0.05)。饲粮与饮水添加酸化剂能增加盲肠中乳酸杆菌数,也能增加17 d和27 d肉鸡禽流感H9抗体效价与新城疫抗体效价,但都未达到差异显著水平(P>0.05)。综上,饲粮与饮水添加酸化剂均能提高肉鸡生产性能,并且饮水添加酸化剂效果要优于饲粮添加酸化剂。
The purpose of this study was to investigate the different effects of acidifiers added in diet and drinking water on broiler production,a total of 36720 broilers were randomly allocated three experimental treatments with 12240 broilers per standard broiler-feeding house included the control group,acidifier added in drinking water and acidifier added in diet.The results showed that compared with the control treatment,both acidifier added in drinking water and acidifier added in diet can reduce the mortality(treatment of diet 12.85%,treatment of drinking water 20.83%),increase the weight of broilers(treatment of diet 1.61%,treatment of drinking water 2.42%),reduce the feed to weight gain ratio(treatment of diet 1.90%,treatment of drinking water 3.16%),and then improve the growth performance of broilers.The acidifier added in drinking water and diet had no significant effect on slaughter performance of broilers(P>0.05).Compared with the control treatment,the crop pH in treatments of acidifier added in diet and drinking water groups decreased by 11.09%and 13.95%;glandular stomach pH decreased by 25.60%and 22.87%;muscle stomach pH decreased by 8.83%and 11.17%(P<0.05).The duodenum pH in treatment of acidifier added in drinking water decreased by 7.08%(P<0.05).Compared with the control treatment,the glandular stomach protease activity in treatments of acidifier added in diet and drinking water increased by 20.00%and 28.84%;muscle stomach protease activity increased by 37.03%and 56.41%.The duodenum protease activity in treatment of acidifier added in drinking water increased by 12.08%and jejuna protease activity increased by 10.21%(P<0.05).The acidifier added in drinking water could significantly decrease the number of Escherichia coli in cecum(P<0.05).Both acidifier added in diet and drinking water could increase the number of Lactobacillus in cecum and the antibody titers of Newcastle disease and avian influenza H9 in day 17 and day 27,whereas no significant difference was observed(P>0.05).In conclusion,acidifier added
作者
郭志有
郑立森
李舫
王小伟
王珊
肖发沂
GUO Zhiyou;ZHENG Lisen;LI Fang;WANG Xiaowei;WANG Shan;XIAO Fayi(Shandong Vocational Animal Science and Veterinary College,Weifang,Shandong Province 261000,China;Weifang Addeasy Bio-Technology Co.,Ltd,Weifang,Shandong Province 261100,China)
出处
《中国饲料》
北大核心
2021年第17期21-26,共6页
China Feed
基金
潍坊市科学技术发展计划项目:肉鸡无抗养殖关键技术集成(2017ZJ1156)
肉鸡复合缓释液体酸化剂的研发与产业化(2017ZJ2064)
山东省抗菌药使用减量化工程技术研究中心资助。
关键词
酸化剂
肉鸡
生产性能
肠道PH
蛋白酶活
抗体效价
acidifier
broiler
growth performance
intestinal pH
protease activity
antibody titers
