发酵黄芪—甘草水提物对817肉鸡生长性能、免疫器官指数和肉品质的影响

试验旨在研究发酵黄芪—甘草水提物对817肉鸡生长性能、免疫器官指数和肉品质的影响。选用1日龄健康817肉鸡90只,利用单因子完全随机试验设计,将90只肉鸡随机分为空白对照组、试验Ⅰ组和试验Ⅱ组,每组3个重复,每个重复10只鸡。对照组饲喂基础日粮+清水、试验Ⅰ组饲喂基础日粮+未发酵黄芪—甘草水提物(饮水给药)、试验Ⅱ组饲喂基础日粮+发酵黄芪—甘草水提物(饮水给药),未发酵中药、发酵中药均用水稀释2 000倍。在试验第21和42天,分别测定肉鸡的平均日增重、料肉比、免疫器官指数及肌肉(胸肌、腿肌)营养成分含量、肉色、滴水损失等肉品质指标。结果显示:1~42日龄时,与对照组相比,Ⅰ、Ⅱ组平均日增重分别提高5.09%(P0.05)和12.72%(P0.05),料肉比分别降低10.84%(P0.05)和22.09%(P0.05)。21日龄时,与对照组相比,Ⅰ、Ⅱ组脾脏指数分别提高4.40%(P0.05)和13.19%(P0.05),法氏囊指数分别提高32.39%(P0.05)和37.09%(P0.05);42日龄时,与对照组相比,Ⅰ、Ⅱ组脾脏指数分别提高31.97%(P0.05)和50.82%(P0.05),法氏囊指数分别提高16.25%(P0.05)和38.13%(P0.05)。21、42日龄,Ⅰ、Ⅱ组肝脏指数均高于对照组。42日龄时,与对照组相比,Ⅰ、Ⅱ组胸肌肌肉水分含量(P0.05)、粗脂肪含量(P0.05)、肉色a*值和肌苷酸含量均提高,肉色b*值和滴水损失均降低;Ⅰ、Ⅱ组腿肌肌肉水分含量、粗蛋白质含量、肉色a*值和肌苷酸含量(P0.05)均高于对照组,肉色b*值和滴水损失(P0.05)均降低;对照组、Ⅰ组和Ⅱ组胸肌和腿肌肉色L*值均差异不显著(P0.05)。综上所述,发酵黄芪—甘草水提物可在一定程度上提高817肉鸡的生长性能和免疫功能,改善肉品质,且作用效果优于未发酵中药。     

发酵扶正解毒口服液对肉鸡生产性能、免疫指标及肉品质的影响

本研究旨在探索发酵扶正解毒口服液对肉鸡生产性能、免疫指标及肉品质的影响。利用单因子试验方法,选取1日龄健康肉鸡90只,随机分为3组,分别为：对照组、Ⅰ组（未发酵制剂）和Ⅱ组（发酵制剂）,每组3个重复,每个重复10只鸡。于试验的第21、42日龄测定肉鸡的生长性能和免疫器官发育情况,42日龄测定肉品质。结果显示,与对照组相比,1~42日龄,Ⅰ、Ⅱ组平均日增重分别提高了8.09%和13.76%（P<0.05）,料重比分别降低了2.23%和10.27%（P<0.05）。21、42日龄,Ⅰ、Ⅱ组脾脏指数比对照组分别提高了9.09%（P>0.05）和15.15%（P<0.05）、34.38%和53.13%（P<0.05）,法氏囊指数比对照组分别提高了1.22%（P>0.05）和20.41%（P<0.05）、8.72%和18.97%（P<0.05）,肝脏指数比对照组均有提高;42日龄,Ⅰ、Ⅱ组胸肌的水分、粗蛋白质、粗脂肪含量、红度（a^*值）、肌苷酸分别比对照组提高了0.57%和2.10%（P<0.05）、1.61%（P>0.05）和4.25%（P<0.05）、49.89%和43.85%（P>0.05）、7.88%和58.62%（P>0.05）、24.50%和31.13%（P<0.05）,胸肌的滴水损失、黄度（b^*值）分别比对照组降低了21.91%和32.24%（P<0.05）、4.55%和21.73%（P>0.05）,Ⅱ组腿肌的肌肉水分、粗蛋白质、粗脂肪和肌苷酸含量均比Ⅰ组和对照组显著提高（P<0.05）,滴水损失显著下降（P<0.05）,a^*值均高于Ⅰ组和对照组,亮度（L^*值）、b^*值均低于Ⅰ组和对照组。结果表明,发酵扶正解毒口服液能够显著提高肉鸡生长性能和免疫指标,且能改善其肉品质。     

发酵扶正解毒口服液对肉鸡生产性能、免疫指标及肉品质的影响

本研究旨在探索发酵扶正解毒口服液对肉鸡生产性能、免疫指标及肉品质的影响。利用单因子试验方法,选取1日龄健康肉鸡90只,随机分为3组,分别为:对照组、Ⅰ组(未发酵制剂)和Ⅱ组(发酵制剂),每组3个重复,每个重复10只鸡。于试验的第21、42日龄测定肉鸡的生长性能和免疫器官发育情况,42日龄测定肉品质。结果显示,与对照组相比,1～42日龄,Ⅰ、Ⅱ组平均日增重分别提高了8.09%和13.76%(P0.05),料重比分别降低了2.23%和10.27%(P0.05)。21、42日龄,Ⅰ、Ⅱ组脾脏指数比对照组分别提高了9.09%(P0.05)和15.15%(P0.05)、34.38%和53.13%(P0.05),法氏囊指数比对照组分别提高了1.22%(P0.05)和20.41%(P0.05)、8.72%和18.97%(P0.05),肝脏指数比对照组均有提高;42日龄,Ⅰ、Ⅱ组胸肌的水分、粗蛋白质、粗脂肪含量、红度(a~*值)、肌苷酸分别比对照组提高了0.57%和2.10%(P0.05)、1.61%(P0.05)和4.25%(P0.05)、49.89%和43.85%(P0.05)、7.88%和58.62%(P0.05)、24.50%和31.13%(P0.05),胸肌的滴水损失、黄度(b~*值)分别比对照组降低了21.91%和32.24%(P0.05)、4.55%和21.73%(P0.05),Ⅱ组腿肌的肌肉水分、粗蛋白质、粗脂肪和肌苷酸含量均比Ⅰ组和对照组显著提高(P0.05),滴水损失显著下降(P0.05),a~*值均高于Ⅰ组和对照组,亮度(L~*值)、b~*值均低于Ⅰ组和对照组。结果表明,发酵扶正解毒口服液能够显著提高肉鸡生长性能和免疫指标,且能改善其肉品质。     

发酵菜籽粕替代豆粕对肉鸡生长性能、肉品质及血清生化指标的影响

本试验旨在研究发酵菜籽粕替代豆粕对肉鸡生长性能、肉品质及血清生化指标的影响。选用23日龄黄羽肉公鸡400只,随机分为4组,每组4个重复,每个重复25只,对照组饲喂基础日粮,试验Ⅰ、Ⅱ和Ⅲ组分别在基础日粮中添加3%、6%和9%发酵菜籽粕等营养替代豆粕。试验期43 d。结果表明:①与对照组相比,试验Ⅰ、Ⅱ和Ⅲ组肉鸡平均日增重、平均日采食量和料重比差异均不显著(P>0.05);与试验Ⅰ、Ⅱ组相比,试验Ⅲ组肉鸡平均日增重分别提高16.47%(P<0.05)、15.03%(P<0.05),料重比分别降低7.71%(P<0.05)和4.27%(P>0.05)。②各组肉鸡胸肌的pH₁、pH₂₄、肉色(L^*、a^*、b^*)、蒸煮损失和嫩度差异均不显著(P>0.05);试验Ⅰ、Ⅱ和Ⅲ组肉鸡胸肌的失水率与对照组相比均显著降低(P<0.05)。③与对照组相比,试验Ⅰ、Ⅱ和Ⅲ组肉鸡血清中葡萄糖含量分别降低13.06%(P<0.05)、8.12%(P>0.05)和9.57%(P>0.05);总蛋白含量分别提高2.50%(P>0.05)、20.86%(P<0.05)和33.92%(P<0.05);谷丙转氨酶含量分别降低7.99%(P>0.05)、18.85%(P>0.05)和26.98%(P<0.05)。综上所述,肉鸡日粮中添加3%~9%发酵菜籽粕等营养替代豆粕是可行的,其中添加9%发酵菜籽粕效果最好。     

发酵中草药添加剂对肉鸡生长性能及物质代谢的影响

按照中兽医配方原则,选取20多种中草药组成3种复合配方,以817肉鸡为研究对象,采用单因子随机分组设计,将420羽1日龄肉鸡随机分成对照组和中草药添加Ⅰ、Ⅱ和Ⅲ组,中草药发酵Ⅰ+、Ⅱ+和Ⅲ+组。每组3个重复,每重复20只;对照组饲喂基础日粮,各试验组设计为基础日粮+0.6%中草药组方1、2和3,基础日粮+0.6%发酵中草药组方1、2和3。结果表明:在生长性能方面,发酵Ⅰ+组末质量、日增质量和料肉比显著高于其他各组(P0.05),Ⅱ、Ⅱ+、Ⅲ和Ⅲ+组末质量和日增质量均高于对照组(P0.05)。物质代谢方面,发酵组粗蛋白和粗脂肪代谢率显著高于对照组(P0.05),发酵Ⅰ+组粗蛋白代谢率最高,干物质代谢率试验组显著低于对照组(P0.05),粗灰分代谢率Ⅰ和Ⅰ+组低于其余各组(P0.05)。在鸡粪总水分、粗蛋白和粗脂肪含量,指标上,发酵Ⅰ+组显著低于未发酵组和对照组(P0.05)。说明在肉鸡生产中,合理的发酵中草药组方对肉鸡生长性能和物质代谢有明显促进作用。     

嗜酸乳杆菌发酵棉粕对黄羽肉鸡免疫功能和抗氧化性能的影响

试验旨在研究嗜酸乳杆菌发酵棉粕对黄羽肉鸡免疫功能和抗氧化性能的影响。选取21日龄健康黄羽肉公鸡180只,随机分为3组：对照组、Ⅰ组和Ⅱ组,每组6个重复,每个重复10只鸡。对照组饲喂含6%棉粕的基础日粮,Ⅰ组饲喂含6%嗜酸乳杆菌发酵棉粕的试验日粮,Ⅱ组饲喂含6%棉粕和7×10⁴ CFU/g嗜酸乳杆菌的试验日粮。结果显示：①42日龄时,各组间免疫器官指数无显著差异（P>0.05）。64日龄时,Ⅰ组的脾脏指数、法氏囊指数和血清中白细胞介素-2（IL-2）含量分别显著提高了47.69%、20.59%和5.77%（P<0.05）,脾脏中白细胞介素-10（IL-10） mRNA表达量极显著提高了449.37%（P<0.01）。Ⅱ组脾脏中γ-干扰素（IFN-γ）和IL-10 mRNA表达量分别显著提高了153.45%和255.70%（P<0.05）;与Ⅱ组相比,Ⅰ组脾脏中IL-10 mRNA表达量提高了54.45%（P>0.05）。②42日龄时,与对照组相比,Ⅰ组血清的总超氧化物歧化酶（T-SOD）活性和总抗氧化能力（T-AOC）分别显著提高了8.26%和22.13%（P<0.05）,肝脏T-AOC显著提高了22.34%（P<0.05）;与Ⅱ组相比,Ⅰ组血清T-AOC显著提高了27.25%（P<0.05）。64日龄时,与对照组相比,Ⅰ组血清、肝脏T-SOD活性分别极显著提高了10.17%、26.17%（P<0.01）,血清GSH-Px活性显著提高了20.45%（P<0.05）;与Ⅱ组相比,Ⅰ组血清、肝脏GSH-Px活性分别显著提高了19.45%、21.23%（P<0.05）,肝脏T-SOD活性极显著提高了18.41%（P<0.01）。以上研究结果提示,日粮中添加发酵棉粕可以显著增强黄羽肉鸡的免疫功能和抗氧化性能,嗜酸乳杆菌对黄羽肉鸡的免疫功能和抗氧化性能有一定的促进作用,但效果不显著。     

发酵稻草对安格斯牛生长性能、屠宰性能、血清生化指标及肉品质的影响

本试验旨在研究发酵稻草对安格斯牛生长性能、屠宰性能、血清生化指标及肉品质的影响。选择体重[（561.23±7.09） kg]相近、体况良好、23月龄左右的安格斯阉牛30头,随机分为3组,每组10个重复,每个重复1头。对照组饲粮中添加10.23%稻草,Ⅰ组饲粮中添加10.00%发酵稻草,Ⅱ组饲粮中添加20.00%发酵稻草,3组饲粮营养水平基本一致。预试期15 d,正试期165 d。结果表明;1）Ⅰ组和Ⅱ组的平均日增重、平均采食量和终末腹围显著高于对照组（P<0.05）,料重比显著低于对照组（P<0.05）。与对照组相比,Ⅰ组和Ⅱ组的养殖效益分别提高了7.60%和14.94%。2）Ⅰ组和Ⅱ组的血清球蛋白和总蛋白含量显著高于对照组（P<0.05）。3）各组之间屠宰性能指标差异不显著（P>0.05）。4）Ⅰ组和Ⅱ组的肌肉肉色黄度（b*）值和粗脂肪含量显著高于对照组（P<0.05）,肌肉剪切力显著低于对照组（P<0.05）。Ⅰ组和Ⅱ组的肌肉饱和脂肪酸（SFA）含量均低于对照组（P>0.05）,肌肉单不饱和脂肪酸（MUFA）和多不饱和脂肪酸（PUFA）含量...     

日粮中添加植物精油对肉鸡生长性能、免疫功能和肠道形态结构的影响

为研究日粮中添加植物精油对白羽肉鸡生长性能、免疫功能和肠道形态结构的影响，试验将240只1日龄体重接近的健康白羽肉鸡随机分为4组，每组6个重复，每个重复10只鸡。4个处理组分别饲喂基础日粮（对照组），基础日粮+400 mg/kg（试验Ⅰ组）、600 mg/kg（试验Ⅱ组）和800 mg/kg（试验Ⅲ组）的植物精油（主要成分为茶树精油、肉桂醛和香芹酚），试验为期42 d。研究表明：（1）42日龄时，对照组与试验Ⅰ～Ⅲ组的初始体重、终末体重、平均日增重和料重比均差异不显著（P> 0.05）；试验Ⅲ组的平均日采食量显著高于对照组和Ⅰ组（P <0.05）；试验Ⅱ组的末重均高于其他各组，料重比低于其他各组，但差异不显著（P> 0.05）。（2）21日龄时，试验Ⅱ组的脾脏指数显著高于其他各组（P <0.05）；与对照组相比，Ⅱ组的胸腺指数和法氏囊指数各提高了12.6%和19.3%;42日龄时，整个试验阶段，与对照组相比，添加植物精油对脾脏指数、胸腺指数和法氏囊指数均无显著影响（P> 0.05）。（3）42日龄时，与对照组相比，试验Ⅱ组空肠的绒毛高度提高30.1%(P ...     

天蚕素抗菌肽对817肉杂鸡生长性能及免疫功能的影响

试验旨在研究天蚕素抗菌肽对817肉杂鸡生长性能和免疫功能的影响。选取1日龄817肉杂鸡900羽,随机分为5个处理组（对照组、抗生素组及Ⅰ、Ⅱ、Ⅲ组）,每组6个重复,每个重复30羽。对照组饲喂基础日粮,抗生素组在基础日粮中添加150 mg/kg金霉素,Ⅰ、Ⅱ、Ⅲ组分别在基础日粮中添加100、200和300 mg/kg天蚕素抗菌肽,试验期42 d。结果显示,Ⅱ、Ⅲ组能显著提高1~21日龄817肉杂鸡的平均日增重（P<0.05）,显著降低料重比（P<0.05）;显著提高21、42日龄817肉杂鸡的胸腺、法氏囊和脾脏指数（P<0.05）;显著提高42日龄肉杂鸡的ND抗体水平和T淋巴细胞转化率（P<0.05）,表明在日粮中添加天蚕素抗菌肽能提高817肉杂鸡的生长性能和免疫功能,在本试验条件下,适宜的添加量为200 mg/kg。     

酸化发酵蛋白饲料对肉鸡生长性能及肠道菌群的影响

试验旨在研究酸化发酵蛋白饲料替代玉米、豆粕对肉仔鸡生长性能及肠道菌群的影响。选择1日龄艾维茵肉仔鸡270羽,随机分为对照组、试验Ⅰ组和试验Ⅱ组,每组3个重复,每个重复30羽。对照组饲喂基础日粮,试验Ⅰ组用3%酸化发酵蛋白饲料替代基础日粮中的玉米、豆粕各1.5%,试验Ⅱ组用6%酸化发酵蛋白饲料替代基础日粮中的玉米、豆粕各3%,试验期42 d。试验结果表明:酸化发酵蛋白饲料能显著提高肉鸡生长性能,1~21日龄和1~42日龄阶段的平均日增重试验Ⅰ组和试验Ⅱ组分别比对照组提高6.6%(P0.05)、5.6%(P0.05)和6.6%(P0.05)、6.1%(P0.05);1~21日龄和1~42日龄阶段的料重比试验Ⅰ组和试验Ⅱ组分别比对照组降低10.7%(P0.05)、11.8%(P0.05)和6.9%(P0.05)、6.0%(P0.05)。酸化发酵蛋白饲料能显著降低肉鸡盲肠内容物中大肠杆菌的数量(P0.05),显著提高乳酸杆菌数量(P0.05)和提高双歧杆菌数量。     

Effect of Soybean Meal Replaced by Fermented Rapeseed Meal on Growth Performance,Meat Quality and Serum Biochemical Indexes of Broilers

This experiment was conducted to study the effect of soybean meal replacement by fermented rapeseed meal on growth performance,meat quality and serum biochemical indexes of broilers.A total 400 23-day-old Yellow-feathered male broilers were randomly divided into 4 groups with 4 replicates per group and 25 broilers per replicate.The broilers in control group were fed a basal diet,and the others were fed the basal diets with the 3% (group Ⅰ),6% (group Ⅱ) and 9% (group Ⅲ) fermented rapeseed meal equal-nutritionally replacing the soybean meal,respectively.The experiment lasted for 43 days.The results showed as follows:① Compared with control group,the ADG,ADFI and F/G of groups Ⅰ,Ⅱ and Ⅲ showed no significant differences (P>0.05);The ADG of group Ⅲ were 16.47% (P<0.05),15.03% (P<0.05) higher than that of groups Ⅰ and Ⅱ,the F/G of group Ⅲ were 7.71% (P<0.05),4.27% (P>0.05) lower than that of groups Ⅰ and Ⅱ.② There were no significant differences in the pH₁,pH₂₄,meat color (L^*,a^*,b^*),cooking loss and tenderness of chest muscle among all groups(P>0.05);Compared with control group,the water loss rate of groups Ⅰ,Ⅱ and Ⅲ were significantly decreased (P<0.05).③ Compared with control group,the serum GLU content of groups Ⅰ,Ⅱ and Ⅲ were decreased by 13.06%(P<0.05),8.12%(P>0.05) and 9.57%(P>0.05);The serum TP content of groups Ⅰ,Ⅱ and Ⅲ were increased by 2.50%(P>0.05),20.86%(P<0.05) and 33.92%(P<0.05);The serum GPT content of groups Ⅰ,Ⅱ and Ⅲ were decreased by 7.99%(P>0.05),18.85%(P>0.05) and 26.98%(P<0.05).It was concluded that it would be feasible to replace the soybean meal with 3% to 9% fermented rapeseed meal in broiler feeding,and the optimum supplemental level of fermented rapeseed meal was 9%.     

Effect of Monascus Compound Additive on Growth Performance and Meat Quality of Broiler

This trial was conducted to study the effect of Monascus compound additives on growth performance and meat quality of broilers.The total of 400 one-day-old Avian broilers were randomly allotted into 4 groups with 5 replicates per group and 20 birds per replicate.The broilers in group Ⅰ(control group),were fed a basal diet,and those in experimental groups Ⅱ,Ⅲ and Ⅳ were fed the basal diet supplemented with 0.5%,1% and 1.5% Monascus compound additives,respectively.The experiment lasted for 42 d.At the ending of the experiment,all the birds were weighted and two of each replicate were slaughtered,the samples from breast and leg muscles were taken for meat quality measurement.The results showed as follows:Compared with control group,the ADG increased significantly（P<0.05),and F/D decreased significantly（P<0.05）in group Ⅲ and Ⅳ,but the differences were not significant between group Ⅲ and Ⅳ(P>0.05);Compared with the control group,the muscle redness（a^*）and yellowness（b^*）in all the experimental groups increased significantly（P<0.05),and the drip loss rate decreased significantly（P<0.05),but the muscle lightness（L^*),cooking loss rate and shear force had no significant change（P>0.05),and pH_{24 h} of muscles in groups Ⅲ and Ⅳ reduced significantly（P<0.05).In conclusion,adding Monascus compound additives in diets could improve growth performance and meat quality in broiles, and the appropriate level should be 1%.     

红曲复合添加剂对肉鸡生长性能及肉质性状的影响

试验旨在研究日粮中添加红曲复合添加剂对肉鸡生长性能及鸡肉品质的影响。选用1日龄艾维因肉鸡400只,随机分为4组,每组设5个重复,每个重复20只鸡,Ⅰ组为对照组,饲喂基础日粮,Ⅱ~Ⅳ组为试验组,分别在基础日粮中添加红曲复合添加剂0.5%、1%和1.5%,试验期42 d,试验结束时肉鸡称重,每个重复选取2只屠宰,测定胸肌和腿肌肉质性状。结果表明,与对照组相比,Ⅲ和Ⅳ组平均日增重显著提高（P<0.05）,料重比显著降低（P<0.05）,但这两个指标在Ⅲ和Ⅳ组间无显著差异（P>0.05）;各试验组与对照组相比,肌肉红度（a^*）和黄度（b^*）显著提高（P<0.05）,滴水损失显著降低（P<0.05）,肌肉亮度（L^*）、蒸煮损失和剪切力差异不显著（P>0.05）,Ⅲ和Ⅳ组pH_{24 h}显著降低（P<0.05）。以上结果说明,日粮中添加红曲复合添加剂可以提高肉鸡生长性能、改善鸡肉品质,其添加量以1%为宜。     

Effects of Antimicrobial Peptide on Growth Performance and Immune Function of 817 Broiler Hybrids

This experiment was conducted to investigate the effects of antimicrobial peptide on growth performance and immune function of 817 broiler hybrids. Nine hundred one-day-old 817 broiler hybrids were chosen and randomly divided into 5 groups with 6 replicates per group and 30 broilers per replicate.The broilers in control group were fed with basal diet, broilers in the antibiotic group were fed with basal diet supplemented 150 mg/kg aureomycin,and that in groups Ⅰ,Ⅱ and Ⅲ were fed with basal diet supplemented 100,200 and 300 mg/kg antimicrobial peptide,respectively. The experiment period was 42 days. The results showed that average daily gain of 817 broiler hybrids in groups Ⅱ and Ⅲ was significantly increased (P<0.05),meanwhile the F/G was significantly decreased at 1-21 days old (P<0.05).The immune organ indexes of thymus,bursa of Fabricius and spleen were significantly increased at 21 and 42 days old (P<0.05),and the antibody level against ND and T lymphocyte transformation rate of 42 days old 817 broiler hybrids were improved (P<0.05). It indicated that antimicrobial peptide could increased growth performance and immune function of 817 broiler hybrids as same with aureomycin,and appropriate dosage of antimicrobial peptide was 200 mg/kg in this experiment.     

糖化玉米秸秆对22～42日龄肉鸡生长性能、养分代谢率、屠宰性能及肉品质的影响

本试验旨在探讨糖化玉米秸秆(SCS)对22～42日龄肉鸡生长性能、养分代谢率、屠宰性能及肉品质的影响.选择22日龄健康的雌性爱拔益加(AA)肉鸡200只,随机分为4个组,每组5个重复,每个重复10只鸡.对照组饲喂基础饲粮,试验组分别在基础饲粮中添加4％(Ⅰ组)、8％(Ⅱ组)和12％(Ⅲ组)的SCS.试验期21 d.结果...     

Effects of Cottonseed Meal Fermented by Lactobacillus acidophilus on Immune Function and Oxidation Resistance of Yellow-feathered Broilers

This study was conducted to examine the effects of cottonseed meal fermented by Lactobacillus acidophilus on antioxidant function and oxidation resistance of Yellow-feathered broilers. One hundred and eighty 21-day-old healthy male Yellow-feathered broilers were randomly divided into 3 groups with 6 replicates per group and 10 broilers per replicate.The broilers in the control group were fed the basal diet with 6% cottonseed meal supplementation,and those in groupⅠ were fed the experimental diet with 6% fermented cottonseed meal supplementation,and the others in group Ⅱ were fed the basal diet included 6% cottonseed meal and 7×10⁴ CFU/g Lactobacillus acidophilus.The results showed as follows:①At 42 days of age,the immune organ index of three groups were no significant difference (P>0.05).At 64 days of age,compared with control group, the spleen index, bursa of Fabricius index,serum IL-2 content and the expression of IL-10 mRNA in spleen of groupⅠwere increased by 47.69% (P<0.05), 20.59% (P<0.05), 5.77%(P<0.05) and 449.37%(P<0.01),respectively,and the expression of IFN-γ and IL-10 mRNA in spleen of groupⅡwere increased by 153.45% and 255.70% (P<0.05),respectively. The expression of IL-10 mRNA in spleen of group Ⅰ was increased by 54.45% compared with group Ⅱ (P>0.05).②At 42 days of age,the serum T-SOD,serum T-AOC and liver T-AOC of group Ⅰ were significantly increased by 8.26%,22.13% and 22.34% compared with control group (P<0.05),and the serum T-AOC of groupⅠwas significantly increased by 27.25% compared with groupⅡ (P<0.05).At 64 days of age,compared with control group,the serum T-SOD,serum GSH-Px and liver T-SOD of groupⅠincreased by 10.17%(P<0.01),20.45% (P<0.05) and 26.17% (P<0.01),respectively,and compared with group Ⅱ,the serum GSH-Px,liver T-SOD and liver GSH-Px of groupⅠincreased by 19.45% (P<0.05),18.41% (P<0.01) and 21.23% (P<0.05),respectively. In conclusion,dietary fermented cottonseed meal could enhance immune function and oxidation resistance of Yellow-feathered broilers, and Lactobacillus acidophilus had no significant influence on immune function and oxidation resistance of Yellow-feathered broilers.     

不同酶谱的复合酶对肉鸡生产性能、血清生化指标及肠道菌群数量的影响

旨在研究不同酶谱的复合酶对肉鸡生产性能、血清生化指标以及肠道菌群数量的影响.选取480只28日龄的白羽肉鸡,随机分为4组,分别为对照组和试验组Ⅰ、Ⅱ、Ⅲ,每组12个重复,每个重复10只(公、母各半),对照组饲喂玉米—豆粕型日粮,试验组Ⅰ、Ⅱ、Ⅲ在相同营养水平的日粮中添加不同酶谱的复合酶,添加量均为200 g/t配合料....