大蒜素替代莫能菌素对肉鸡生产性能的影响

实验选用15日龄健康艾维因肉鸡120羽,随机分成实验对照组、大蒜素组、莫能菌素组,每组40羽,进行喂养试验以预防球虫病的发生。对照组饲喂葫芦岛大禾牧业有限公司生产的肉鸡料;大蒜素组和莫能菌素组分别在同样的肉鸡料中各添加0．3g／kg大蒜素和莫能菌素。结果表明：大蒜素组和莫能菌素组日增重明显高于对照组,无球虫病的发生。大蒜素组和莫能菌素组（P〉0．05）虽差异不显著,但大蒜素组在日增重、收入值上均略高于莫能菌素组,大蒜素组的存活率高于莫能菌素组,明显高于对照组。说明在肉鸡生产中用大蒜素替代莫能菌素是可行的。     

大蒜素与抗生素对肉鸡生产性能的对比试验

选择1日龄健康土杂肉鸡,随机分为三组,即对照组、大蒜素组和金霉素组,进行饲养试验,试验期为42天。试验结果表明：大蒜素组和金霉素组平均日增重显著高于对照组,料重比低于对照组,大蒜素组生产性能与金霉素组生产性能基本相当。大蒜素具有替代抗生素的可能性。     

大蒜素与抗生泰对肉鸡生产性能的对比试验

选择1日龄健康土杂肉鸡，随机分为三组，即对照组、大蒜素组和金霉素组，进行饲养试验，试验期为42d。试验结果表明：大蒜素组和金霉素组平均日增重显著高于对照组，料重比低于对照组，大蒜素组生产性能与金霉素组生产性能基本相当。大蒜素具有替代抗生素的可能性。     

日粮中大蒜素替代抗生素对肉鸡生长性能的影响

日粮中应用黄霉素、大蒜干粉和大蒜素3种添加剂,并设对照组。添加剂组肉鸡的日增重平均提高了2.3%,死亡率平均降低了3.9%。各个添加剂组之间的差异却不显著。表明大蒜素组与黄霉素组生长性能基本相同,在肉鸡生产中使用大蒜素替代抗生素是可行的。     

日粮中糖萜素替代抗生素对肉鸡生产性能的影响

选用1日龄AA肉用仔鸡1680羽分设三组，每组设有重复，进行了55天试验，探讨了日粮中糖萜素来替代抗生素对肉鸡生产性能的影响。结果表明日粮中添加糖萜素替代抗生素可提高肉鸡成活率，饲料转化率和饲养效益，体增重和采食量和使用抗生素的日粮相近。肉鸡日粮中糖萜素替代抗生素具有明显的综合生产效益。     

日粮中糖萜素替代抗生素对肉鸡生产性能的影响

选用1日龄AA肉用仔鸡1680羽，分设三组，每组设有重复，进行55天试验，探讨日粮中糖萜素替代抗生素对肉鸡生产性能的影响，结果表明，日粮中添加糖萜素替代抗生素可提高肉鸡成活率、饲料转化效率和饲养效益，体增重和采食量与使用抗生素的日粮相近，肉鸡日粮中糖萜素替代抗生素具有明显的综合生产效益。     

发酵中草药微生态制剂替代饲料中抗生素对肉鸡生产性能的影响

本研究旨在用发酵中草药微生态制剂替代饲料中抗生素对肉鸡生产性能的影响。选取1日龄至42日龄出栏的AA肉鸡31000只为试验对象,分为中草药试验组和抗生素对照组2个组。试验对比各组日增重、饲料转化率、死淘率和免疫抗体滴度。结果表明,饲料中添加发酵中药微生态制剂能显著提高肉鸡生产性能,试验组明显高于对照组(P<0.05)。结论:用发酵中草药微生态制剂替代饲料中的抗生素饲喂肉鸡,能够显著改善和提高肉鸡的生产性能,加快促进肉鸡生长,提高免疫力和抗病力,减少和降低肉鸡发病率。     

芥菜花粉提取物对黄羽肉鸡生产性能影响的研究

选择1200只1日龄岭南黄肉鸡,分为3个组,每组设5个重复,每个重复80只肉鸡,其中组1,只饲喂基础日粮为A组,即对照组,基础日粮中添加泰乐菌素为B组,即抗生素组,基础日粮中添加芥菜花粉提取物为C组,即为试验组.测定3组肉鸡的生产性能.结果表明,芥菜花粉提取物在提高肉鸡体重和体增重,提高采食量,降低料肉比,提高存活率,提高肉鸡养殖的经济效益均优于抗生素,可替代抗生素用于肉鸡促生长.     

饲用合生元在肉鸭养殖中的应用研究

为研究合生元部分替代抗生素对樱桃谷肉鸭生产性能及免疫机能的影响,本试验选取1日龄樱桃谷肉鸭12000羽,随机平均分成3组,每组2个重复。对照组饲喂基础日粮,抗生素组在基础日粮中添加4 mg/kg黄霉素,合生元替代组在基础日粮中添加2 mg/kg黄霉素和0.5 g/kg的合生元。试验结果表明,肉鸭饲料中添加合生元部分替代抗生素,与添加抗生素相比动物的生产性能和免疫性能未见显著差异(P0.05)。两试验组与对照组相比较,生产性能和免疫能力均显著提升(P0.05)。     

中草药提取物对肉鸡生长性能、器官发育、免疫功能及肠道菌群的影响

文章旨在研究日粮添加中草药提取物替代抗生素对1～42 d肉鸡生长性能、器官发育、免疫功能及肠道菌群的影响。试验选择1日龄商品肉鸡1008只,随机分为6组,每组6个重复,每个重复28只鸡。试验设计的6个组分别为对照组、抗生素组和中草药提取物组,其中对照组饲喂基础日粮,抗生素组在基础日粮中添加15 mg/kg维吉霉素,中草药提取物组分别在基础日粮中添加0.1%金花菊、大蒜素、百里香和3种中草药混合物,试验开展42 d。结果显示:日粮添加中草药提取物显著影响42 d肉鸡日采食量和料重比(P 0.05);与抗生素组相比,处理1组肉鸡采食量和体重显著降低(P 0.05),料重比显著提高(P 0.05)。抗生素组较对照组、处理1组、处理2组和处理3组显著降低了小肠的相对重量(P 0.05),而处理4组较对照组和处理3组显著降低了小肠的相对重量(P 0.05)。处理2组较其他组显著提高了法氏囊相对重量(P 0.05),处理1组抗免疫红细胞和过敏反应程度显著高于其他各组(P 0.05)。处理2组显著降低了血清甘油三酯、胆固醇和低密度脂蛋白含量(P 0.05),同时显著提高高密度脂蛋白含量(P 0.05)。处理3组较对照组显著降低回肠内容物大肠杆菌的含量(P 0.05),处理4组较其他各组显著提高回肠内容物乳酸杆菌的含量(P 0.05)。结论 :日粮添加大蒜素可以达到与抗生素一致的效果,提高1～42 d肉鸡料重比,大蒜素和金花菊可以改善免疫性能,降低血清甘油三酯含量和肠道大肠杆菌含量。     

大蒜素对肉鸡免疫器官发育及T淋巴细胞阳性率的影响

将240只7日龄AA肉鸡随机分成4组,各组在玉米-豆粕型基础日粮中,分别添加0(对照)、12.5、37.5、62.5mg/kg的大蒜素,饲养期42天。结果表明:各组间肉鸡的免疫器官相对重量相比,添加大蒜素三个处理组35日龄法氏囊均比对照组(0mg/kg)显著增加(p<0.05),其中,37.5、62.5mg/kg两处理组21日龄胸腺和62.5mg/kg处理组35日龄脾脏均比对照组显著增加(p<0.05);T淋巴细胞阳性率结果显示,37.5mg/kg、62.5mg/kg两处理组明显高于对照组(p<0.05)。     

Effects of dietary supplementation with a herbal extract on the performance of broilers infected with a mixture of Eimeria species

1. A herbal extract containing a blend of three essential oils, derived from oregano, laurel leaf and lavender, was investigated as a feed additive alternative to the conventional anticoccidial sodium monensin.

2. Broilers were infected with a mixture of Eimeria species or left uninfected.

Both infected and uninfected broilers were provided with diets containing either herbal extract (HEX), monensin (MON) or without these supplements (CON). The HEX group had 50?mg herbal extract/kg diet and the MON group 100?mg monensin/kg diet.

3. All of the uninfected broilers exhibited higher body weight gain and better feed conversion when compared with their infected counterparts at d 28 and 42 of age. Both HEX and MON supplements caused significant improvements in performance in the infected broilers, but failed to have any effect on uninfected broilers.

4. Faecal oocyst output measured daily by sampling excreta, and expressed on a per bird basis, was lower in the HEX and MON groups than in the CON group. However, the herbal extract was not as effective as monensin in reducing oocyst excretion. Coccidial infection caused a significant increase in total intestinal length and caecal weight, but the dietary treatments did not influence these measurements.

5. These results indicate that providing a herbal extract in the diet was not as effective as monensin in protecting broilers exposed to a coccidial challenge.     

复合微生态制剂替代开口抗生素在肉雏鸡上的应用研究

试验旨在研究复合微生态制剂和开口抗生素对肉雏鸡免疫性能、肠道菌群和血清生化指标的影响。选取180只1日龄健康雌性白羽肉雏鸡,随机分为3组,每组3个重复,每个重复20只。Ⅰ组为对照组,饲喂不含抗生素的基础日粮;Ⅱ组为复合微生态制剂组,在基础日粮中添加2.0‰复合微生态制剂产品;Ⅲ组为开口抗生素组,在基础日粮中添加莫能霉素(90 g/t)、抗敌素(30 g/t)和阿散酸(100 g/t)。试验期14 d。结果表明:①14日龄时,试验Ⅱ组法氏囊指数和脾脏指数分别显著高于对照组和试验Ⅲ组(P<0.05);②7日龄时,试验Ⅱ组盲肠大肠杆菌数显著低于对照组(P<0.05),14日龄时,试验Ⅱ组小肠乳酸菌数显著高于试验Ⅲ组(P<0.05);③14日龄时,试验Ⅲ组肉雏鸡血清白介素2含量显著低于试验Ⅱ组和对照组(P<0.05),谷丙转氨酶含量显著高于试验Ⅱ组(P<0.05),但与对照组相比差异不显著(P>0.05),且14日龄时,试验Ⅱ组尿素氮含量显著低于试验Ⅲ组(P<0.05)。提示,在基础日粮中添加2.0‰复合微生态制剂能部分或全部替代开口抗生素应用在肉雏鸡生产中。     

Effect of including lasalocid or monensin singly or in combination with furazolidone on the growth and feed consumption of turkey poults

Lasalocid and monensin are widely used to control coccidiosis in broilers, but not in turkey poults. Four feeding trials were conducted to determine the performance of turkey poults when these compounds were used singly or in combination with 100 ppm of furazolidone. Bodyweights and feed consumption were significantly depressed for five weeks after hatching by 150 ppm of lasalocid. Combining furazolidone with lasalocid ameliorated the toxic effect of lasalocid. Bodyweights were significantly depressed by 150 ppm of monensin in the fifth week after hatching, but there was no significant depression in feed consumption. Furazolidone exacerbated any toxic effects of monensin. Data indicate that monensin may be used safely at dosages greater than the recommended level of 60 to 99 ppm, but should not be used in combination with furazolidone.     

大蒜素对断奶仔猪生长发育及其周围环境的影响

选用 10 8头 2 0日龄健康无病的杜× (长×大 )三元杂交断奶仔猪 ,按血缘、体重、性别一致原则随机分为 2组 ,每组设 3个重复。各组试验猪基础日粮一致、饲养管理条件一致 ,并由同一饲养员饲养。对照组饲喂带有抗生素的饲料 ;试验组在饲料中添加 2 5%大蒜素 2 0 0g t,试验期18d。结果表明 ,与对照组比较 ,试验组日增重提高 16 5% (P <0 0 5) ,料重比降低 13% (P <0 0 5) ,采食量无显著差异 ,未有试验猪发病 ,粪便颜色比对照组浅 ,粪便表面蚊蝇量较少 ,说明大蒜素对仔猪具有促生长作用 ,同时还具有抑菌和杀菌、减少仔猪发病率、驱除蚊蝇、改善舍内外环境等功效 ,从而提高了经济效益 ,是一种极具有开发价值的中草药添加剂     

乳酸菌培养物对肉鸡生长性能及免疫功能的影响

试验旨在研究灭活乳酸菌培养物对肉鸡生长性能及免疫功能的影响。选择300只体重相近的健康1日龄AA肉仔鸡,随机分为5组,每组6个重复,每个重复10只鸡,雌、雄各半。其中对照组饲喂基础日粮,抗生素组在基础日粮中添加0.01%金霉素,乳酸菌培养物组分别在基础日粮中添加0.16%乳酸菌培养物L1、L2、L3。试验期42 d,分1~21日龄(前期)和22~42日龄(后期)2个阶段。结果显示,1~21日龄时,乳酸菌培养物L1组肉鸡平均日采食量极显著高于对照组和抗生素组(P<0.01),血清中白介素-2(IL-2)含量显著低于对照组(P<0.05),脾脏指数、胸腺指数、法氏囊指数均显著高于对照组(P<0.05);乳酸菌培养物L2组肉鸡脾脏指数、胸腺指数显著高于对照组(P<0.05);乳酸菌培养物L3组肉鸡平均日增重极显著高于对照组和抗生素组(P<0.01);抗生素组肉鸡血清中γ-干扰素(IFN-γ)含量显著高于乳酸菌培养物组(P<0.05)。22~42日龄时,乳酸菌培养物L1、L2组肉鸡平均日增重极显著高于对照组和抗生素组(P<0.01);乳酸菌培养物L2组肉鸡血清中免疫球蛋白G(IgG)含量显著高于抗生素组(P<0.05),血清新城疫抗体效价及脾脏指数、胸腺指数、法氏囊指数均显著高于对照组(P<0.05);乳酸菌培养物L3组肉鸡血清中免疫球蛋白A(IgA)含量及胸腺指数显著高于对照组(P<0.05)。由此可知,在肉鸡日粮中添加一定量的灭活乳酸菌培养物可在一定程度上提高肉鸡的生长性能、增强其免疫功能,其中,对于提高肉鸡的生长性能,试验前期添加L3效果较好,试验后期添加L1和L2效果较好;对于增强肉鸡的免疫功能,试验前期添加L1效果较好,试验后期添加L2效果较好。     

饲料中添加柑桔皮粉和有机稀土复合饲料添加剂对黄杂肉用仔鸡生产性能的影响

将32日龄黄杂肉用仔鸡120只随机分成2组，每组60只，第一组为对照组，仅饲喂基础日粮，第二组饲喂在基础日粮中添加2％的柑桔皮粉 0．5％的730有机稀土复合饲料添加剂的日粮，试验进行35d，结果表明，试验组的增重比对照组高17．07％，料重比比对照组降低16．86％，饲料转化率比对照组提高20．27％，经济效益比对照组高40．14％。     

Effects of Lactic Acid Bacteria Cultures on Growth Performance and Immunity Function of Broilers

This experiment was conducted to study the effects of inactivated lactic acid bacteria cultures on growth performance and immunity function of broilers.A total of 300 one-day-old AA broilers with similar weight were randomly assigned to 5 groups with 6 replicates per group and 10 broilers per replicate (half male and half female).The control group was fed a basal diet;The antibiotic group was fed the basal diet supplemented with 0.01% chlortetracycline;The lactic acid bacteria cultures groups (L1, L2, L3) were fed the basal diets supplemented with 0.16% lactic acid bacteria cultures L1, L2, L3, respectively.The whole experiment period was 42 days, including two phase of days 1 to 21 (starter period) and days 22 to 42 (finisher period).The results showed as follows:From 1 to 21 days of age, ADFI of broilers in lactic acid bacteria cultures group L1 was extremely significant higher than that in control and antibiotic groups (P<0.01), the serum content of IL-2 was significantly lower than that in control group (P<0.05), the indexes of spleen, thymus and bursa of fabricius were significantly higher than that in control group (P<0.05).The indexes of spleen and thymus of broilers in lactic acid bacteria cultures group L2 were significantly higher than that in control group (P<0.05);ADG of broilers in lactic acid bacteria cultures group L3 was extremely significant higher than that in control and antibiotic groups (P<0.01);The serum content of IFN-γ of broilers in antibiotic group was significantly higher than that in lactic acid bacteria cultures groups (P<0.05).From 22 to 42 days of age, ADG of broilers in lactic acid bacteria cultures group L1 and group L2 were extremely significant higher than that in control and antibiotic groups (P<0.01);The serum content of IgG was significantly higher than that in antibiotic group (P<0.05), Newcastle disease antibody titers in serum and the indexes of spleen, thymus and bursa of fabricius of broilers were significantly higher than that in control group (P<0.05);The serum content of IgA and the thymus index of broilers in lactic acid bacteria cultures group L3 were significantly higher than that in control group (P<0.05).Therefore, supplementing inactivated lactic acid bacteria cultures in a diet could improve growth performance and immunity function of broilers to some extent.Among them, adding L3 was better during starter period for improving growth performance of broilers, while add L1 and L2 during finisher period.Adding L1 was better during starter period for improving immunity function of broilers, while add L2 during finisher period.     

水产下脚料对肉鸡生长性能、胴体性状及肠道健康的影响

文章旨在评估日粮添加不同水平的水产下脚料对肉鸡生长性能、胴体性状及肠道健康的影响。试验将504只体重一致的1日龄肉鸡随机分为3组,每组6个重复,每个重复28只。对照组饲喂基础日粮,处理组饲喂水产下脚料添加水平为8%和16%的日粮,对照组与处理组日粮的营养水平保持一致,试验为期6周。结果：T1和T2组42?d肉鸡体重、22～42?d平均日增重和平均日采食量显著高于对照组（P＜0.05）,但处理组22～42?d和1～42?d肉鸡料重比显著低于对照组（P＜0.05）。T2组1～42?d肉鸡平均日增重较对照组显著提高5.18%（P＜0.05）。T1和T2组肉鸡胸肌相对重量较对照组分别显著提高3.41%和3.75%（P＜0.05）,而T2组肉鸡屠宰率和腿肌重较对照组显著提高0.82%和3.47%（P＜0.05）。处理组肉鸡嗉囊、回肠pH、细菌总数及回肠大肠杆菌数量显著低于对照组（P＜0.05）,但处理组肉鸡嗉囊乳酸菌数量显著高于对照组（P＜0.05）。T1和T2组肉鸡空肠和回肠绒毛高度及空肠绒毛高度与隐窝深度比值显著高于对照组（P＜0.05）,但空肠隐窝深度显著低于对照组（P＜0.05）。结论：基础日粮中添加8%～16%水产下脚料可以提高肉鸡的日增重和饲料效率,降低嗉囊和回肠有害菌数量,改善空肠和回肠绒毛形态,对器官相对重量无负面影响。 [关键词]水产下脚料|肉鸡|生长性能|胴体特征|肠道健康     

不同类型昆虫粉对肉鸡生长性能、血液生化指标及肠道发酵的影响

本研究旨在评估昆虫粉对肉鸡生长性能、血液生化指标及肠道发酵的影响。试验将432只1日龄商品肉鸡分为3组,每组6个重复,每个重复24只。各组肉鸡分别饲喂基础日粮（对照组）、基础日粮+0.5%黄粉虫粉（黄粉虫组）和基础日粮+0.5%水虻粉（水虻组）,饲养试验为期4周。结果：对照组15～28?d肉鸡料重比较黄粉虫和水虻组分别显著提高8.10%和4.13%（P＜0.05）,对照组1～28?d肉鸡料重比较黄粉虫组显著提高5.35%（P＜0.05）。黄粉虫和水虻粉组肉鸡血清白蛋白和磷浓度显著高于对照组（P＜0.05）,但胆固醇浓度显著降低（P＜0.05）。黄粉虫组肉鸡血清GOT活性显著低于对照组和水虻粉组（P＜0.05）。水虻粉组血清MDA浓度显著低于黄粉虫组（P＜0.05）,但血清SOD活性表现最高（P＜0.05）。对照组肉鸡盲肠α-葡萄糖苷酶和β-半乳糖酶活性显著高于水虻粉组（P＜0.05）,而β-葡萄糖苷酶活性显著高于黄粉虫组（P＜0.05）。对照组盲肠内容物乙酸、丙酸和挥发性脂肪酸总量浓度显著高于处理组（P＜0.05）。结论：1～28?d肉鸡日粮中补充0.5%黄粉虫可以改善饲料效率,降低血清胆固醇浓度,而0.5%水虻粉可以提高肉鸡血清抗氧化功能。 [关键词]昆虫粉|肉鸡|生长性能|血液生化|肠道发酵