双乙酸钠对肉鸭生产性能的影响

选用一日龄健康樱桃谷肉鸭新生雏90只，随机分为3组，每组设3个重复，每个重复10只肉鸭，试验采用单因素完全随机试验设计。A组饲喂基础日粮，B、C组在基础日粮的基础上分别添加0．2％、0.4％的双乙酸钠。结果表明：日粮中添加双乙酸钠对提高肉鸭日增重、胸肌率、腿肌率有显著影响（P〈0．05）；对肉鸭的饲料转化率有极显著影响（P〈0．01）；对肉鸭的成活率、屠宰率和皮脂率无显著影响（P〉0．05）。B组日增重比A组提高了8．65％（P〈0．05），比C组提高了5_45％（P〉0．05）；B组料重比较A组降低了11．52％（P〈0．01），较C组降低了3．29％（P〉0．05）：B组的成活率与A组、C组间差异均不显著（P〉0．05）；B组每只肉鸭分别比A、C组多盈利1．04、1．06元。     

爱绿宁对樱桃谷肉鸭生长性能及血清抗氧化指标的影响

研究旨在探讨植物提取物饲料添加剂爱绿宁对3～6周龄樱桃谷肉鸭生长性能及血清抗氧化指标的影响。选取体质健康、体重中等的14日龄樱桃谷肉鸭320羽（公母各半），随机分为2组，每组4个重复，每重复40羽。Ⅰ组为空白对照组，饲喂基础饲粮；Ⅱ组为试验组，在每千克基础饲粮中添加爱绿宁150mg，试验期27d。结果表明：（1）与Ⅰ组相比，Ⅱ组平均日采食量、平均日增重分别提高0．89％（P〉0．05）、3．39％（P〉0．05）；Ⅱ组料重比较Ⅰ组显著降低2．63％（P〈0．05）。（2）Ⅱ组血清谷胱甘肽过氧化物酶（GSH-Px）活性相较于Ⅰ组提高0．46％（P〉0．05）；试验组血清超氧化物歧化酶（SOD）活性与对照组相比，显著提高11．58％（P〈0．05）。可见，在3～6周龄樱桃谷肉鸭饲粮中添加150mg／kg爱绿宁可提高其生长性能及血清抗氧化指标。     

高温季节添加小苏打对肉用仔鸡生产性能的影响研究

为探讨小苏打对高温季节肉用仔鸡生产性能的影响，选择21日龄AA肉用仔鸡2000羽，随机分试验组和对照组，每组2个重复。试验组饲料中添加0．4％小苏打。结果显示，试验组比对照组平均日增重提高7．67％，差异显著（P〈0．05）；饲料报酬提高10．05％，差异显著（P〈0．05）；中暑发生率下降55．00％，差异极显著（P〈0．01）；死亡率下降61．29％，差异极显著（P〈0．01）。经济效益分析，试验组比对照组每羽肉鸡多获毛利18．07％，差异显著（P〈0．05）。     

微贮秸杆饲料对断奶仔猪生产性能影响的研究

本研究探讨经过微生物发酵处理的作物秸杆饲料替代5％、10％的精料配合饲料，对断奶仔猪生产性能的影响。试验选用78头体重相近的4周龄断奶仔猪，按体重、性别、遗传基础进行分组饲养试验。试验采用单因子随机区组设计，分3个处理组，5％秸杆微贮饲料＋95％全价目粮组，10％秸杆微贮饲料＋90％全价日粮组和基础日粮对照组。每个处理2个重复，每个重复13头仔猪。试验结果表明，试验组日增重显著高于对照组（P〈0．05），两试验组间差异不显著（P〉0．05）。各组间饲料转化率差异不显著（P〉0．05），饲料成本明显低于对照组，其中10％微贮秸杆饲料组优为明显。仔猪腹泻率明显低于对照组。     

合生素对肉鸭生产性能及胴体品质的影响

选用1日龄健康樱桃谷肉鸭新生雏144只，按体质量随机分为3组，每组设3个重复，每重复16只。对照组饲喂基础日粮，抗生素组添加5mg／kg黄霉素基础日粮，试验组1和组2在基础日粮中分别添加0．05％和0．10％合生素。结果表明，日粮中添加合生素对肉鸭日增质量、胸肌率和腿肌率有显著影响；对肉鸭的饲料转化率有极显著影响；对肉鸭的成活率、屠宰率和皮脂率无显著影响。与抗生素组相比，具有相似的作用。试验组1的日增质量比对照组提高8．56％，比试验组2提高5．54％，比抗生素组提高4．34％；试验组1的料肉比与对照组降低11．52％，比试验组2降低3．29％，比抗生素组降低3．24％。     

喹烯酮预混剂对肉鸡的增重试验

研究了喹烯酮预混剂对肉鸡生产性能的影响。选用150羽7日龄肉仔鸡,随机分为3组,每组3个重复。对照空白组饲喂基础日粮,喹乙醇对照组饲喂添加75×10^4的喹乙醇预混剂基础日粮,试验组饲喂添加75×10^4的喹烯酮预混剂基础日粮,试验期35d。结果：实验组肉鸡的末期平均体重、净增重和日增重均高于空白对照组和喹乙醇组,差异显著（P〈0.05）,试验组的平均采食量均高于两对照组（P〉0.05）。试验组的饲料转化率较空白对照组提高了3．69％（P〈0．05）,比喹乙醇组高1．5％（P〉0.05）。结果表明在较高的营养水平条件下喹烯酮对肉鸡有良好的的促生长作用。     

喹烯酮预混剂对肉鸡的增重试验

本文研究了喹烯酮预混剂对肉鸡生产性能的影响。选用150羽7日龄肉仔鸡,随机分为3组,每组3个重复。对照空白组饲喂基础日粮,喹乙醇对照组饲喂添加75ppm的喹乙醇预混剂基础日粮,试验组饲喂添加75ppm的喹烯酮预混剂基础日粮,试验期35d。结果：实验组肉鸡的末期平均体重、净增重和日增重均高于空白对照组和喹乙醇组,差异显著（P〈0．05）;试验组的平均采食量均高于两对照组（P〉0．05）;试验组的饲料转化率较空白对照组提高了3．69％（P〈0．05）,比喹乙醇组高1．5％（P〉0．05）。结果表明在较高的营养水平条件下喹烯酮对肉鸡有良好的的促生长作用。     

牛至油对肉仔鸡生长性能和细胞免疫功能的影响

将150只1日龄健康艾维茵肉仔鸡随机分为5组,每组设3个重复（每个重复10羽）。第1组为对照组,饲喂玉米——豆粕型基础日粮,2-5组为试验组,一在其基础日粮中分别添加75,100,125,150mg／kg的10％牛至油预混剂;饲养6周。结果表明,与对照组相,在试验前期（0-3周龄）,125mg／kg牛至油组肉仔鸡的日增重提高了11．20％（P〈0．01）,料肉比降低了13．55％（P〈0．01）;在试验后期（4-6周龄）,100mg／kg牛至油组的日增重提高了8．20％（P〈0．01）,料肉比降低了11．93％（P〈0．01）。42日龄,100mg／kg牛至油组的T淋巴细胞酸性α-醋酸萘涵旨酶的活性和T淋巴细胞转化率分别比对照组提高了16．56％、13.90％（P〈0．05）。生长前期（0～3周龄）以125mg／kg的添加量为宜,生长后期（4-6周龄）的适宜添加量为100mg／kg。     

高米糠粕日粮中添加酶制剂对番鸭生长性能的影响

选择22日龄商品代番鸭180只，研究在高米糠粕日粮中添加酶制剂对其生长性能的影响。结果表明：添加0．1％酶制剂使番鸭日增重提高10．83％（P〈0．01），饲料利用率提高10．35％（P〈0．01），肝重率提高16．87％（P〈0．01），腹脂率降低10．38％（P〉0．05）。添加酶制剂有利于番鸭羽毛生长，防止啄羽，试验第2、第3周加酶组啄羽率比对照组均下降50％。     

凝结芽孢杆菌对1～21日龄樱桃谷肉鸭生长性能、血清抗氧化指标和免疫器官指数的影响

本试验旨在探讨凝结芽孢杆菌对l～21日龄樱桃谷肉鸭生长性能、血清抗氧化指标、免疫器官指数的影响。选取体质健康、体重中等的1日龄樱桃谷肉鸭750羽,随机分为5组（每组设5个重复,每重复30羽）：I组为空白对照组,饲喂基础饲粮;Ⅱ组为抗生素对照组,在基础饲粮的基础上添加30mg/kg杆菌肽锌;nl、1V和V组为试验组,分别在基础饲粮的基础上添加100mg,kg、200mg/kg和300mg＆g凝结芽孢杆菌制剂,试验期21d。结果表明：1）与I组相比,Ⅲ、Ⅳ和V组平均日增重分别提高了o．39％（P〉0．05）、n39％（P〉O．05）和1．18％（Dn05）;料重比分别显著降低了1．25％（尺O．05）、1．88％（P〈0．05）和2．50％（P〈0．05）;各组之间成活率没有显著差异。2）V组血清谷胱甘肽过氧化物酶活性相较于I组显著提高了6．53％（P〈0．05）。3）与I组比,V组胸腺指数显著提高了26．67％（P〈O．05）;V组法氏囊指数与I、Ⅱ组比分别显著提高6．37％（P〈0．05）、6．37％（P〈0．05）。可见,在1～21日龄樱桃谷肉鸭饲粮中添加300me,＆g凝结芽孢杆菌制剂能提高肉鸭平均日增重,降低料重比,提高血清中谷胱甘肽过氧化物酶活性,同时还能提高其免疫器官指数。     

Heartworm in dogs in Canada in 1983

In late December 1983, 2 800 veterinarians across Canada were sent a questionnaire in order to assess the status of heartworm disease in Canada in 1983 and 26% of them responded. Veterinarians reported that 59 504 dogs were blood-tested to check for microfilariae and 771 dogs (1.30% of those tested) were found with Dirofilaria immitis. Heartworm disease was diagnosed in all provinces except New Brunswick and Newfoundland but most (733) of the cases were in Ontario.

Heartworm disease was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 31% of the cases were observed with clinical signs of heartworm disease and 64% had a history of not having left Canada. Southwestern Ontario continues to be the focus of the infection and most of the dogs there had not left the province previously.

     

Heartworm in dogs in Canada in 1985

In late December 1985, 1485 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1985 and 44% of them responded. Veterinarians reported that 137,300 dogs were blood-tested to check for microfilariae and 1210 dogs were found with heartworm. Another 36 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number diagnosed in 1985 as 1247 (0.91%).

Heartworm was reported from all provinces except Prince Edward Island, Newfoundland and Saskatchewan but most (1126) of the cases were in Ontario. Southwestern Ontario continued to be the primary focus of the infection in Canada. From Quebec, 91 cases were reported mostly from and around Montreal. From Manitoba, 19 cases were reported from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 28% of the cases were observed with clinical signs of heartworm disease and 78% had a history of not having left Canada.

     

Heartworm in dogs in Canada in 1988

In late November 1988, 1581 small and mixed animal clinics and institutional veterinarians across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1988, and 46% of them responded. Veterinarians reported that 181,577 dogs were blood-tested for heartworm disease and 367 dogs were found with D. immitis microfilariae. Another 60 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1988 as 441 (0.24%).     

Heartworm in dogs in Canada in 1984

In late December 1984, 1853 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1984 and 35% of them responded. Veterinarians reported that 97,794 dogs were blood-tested to check for microfilariae and 1417 dogs (1.45% of those tested) were found with heartworm. Another 34 dogs were amicrofilaremic, but were diagnosed as having heartworm disease, to give the total number diagnosed in 1984 as 1451 (1.48%). Heartworm was reported from all provinces except Prince Edward Island and Newfoundland but most (1310) of the cases were in Ontario. In Quebec, 126 cases were reported mostly from west of Montreal.

Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 27% of the cases were observed with clinical signs of heartworm disease and 72% had a history of not having left Canada. Southwestern Ontario continued to be the primary focus of the infection.

     

Heartworm in dogs in Canada in 1989

In late November 1989, 1732 clinics and institutional veterinarians were sent a questionnaire to assess the status of Dirofilaria immitis, and 51.7% responded. Of 247,716 dogs tested, 394 had D. immitis microfilariae and 51 were amicrofilaremic for a total of 445 cases and heartworm prevalence of 0.17%. Most (408) of these dogs had no preventive medication and the prevalence among dogs tested and unprotected was 1.01%. That prevalence was considerably higher in endemic areas. Thirty-seven dogs with heartworm had preventive medication. Heartworm was most frequent in companion dogs over three years of age maintained outdoors in rural areas. About 75% of the cases had never left Canada, 26% had clinical signs and 125 were not treated.

Heartworm was reported from British Columbia, Manitoba, Ontario, Quebec, Nova Scotia and Newfoundland, but 383 cases were in Ontario. South-western Ontario was the primary focus of infection. There were 33 cases in Quebec and 24 in Manitoba, mainly found in and around Metropolitan Montreal and Winnipeg respectively.

     

Heartworm in dogs in Canada in 1987

In late November 1987, 1246 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1987, and 50% of them responded. Veterinarians reported that 165,428 dogs were blood tested for heartworm disease and 511 dogs were found with D. immitis microfilariae. Another 78 dogs were amicrofilaremic but diagnosed with heartworm disease to give the total number of cases diagnosed in 1987 as 589 (0.35%).     

Heartworm in dogs in Canada in 1986

In late December 1986, 1224 institutional veterinarians and small and mixed animal clinics across Canada were sent a questionnaire in order to assess the status of Dirofilaria immitis in Canada in 1986; 46% of them responded. Veterinarians reported that 150,989 dogs were blood-tested for microfilariae and 869 dogs were found with heartworm. Another 65 dogs were amicrofilaremic but diagnosed with heartworm disease and one was found with heartworm at necropsy to give the total number diagnosed in 1986 as 935 (0.62%).

Heartworm was reported from Manitoba, New Brunswick, Ontario and Quebec, but most (810) of the cases were from Ontario. South-western Ontario continued to be the primary focus of the infection in Canada. There were 103 cases reported from Quebec, mostly from and around Montreal, and 21 cases from Manitoba, from Winnipeg and surrounding areas. Heartworm was found most frequently in companion dogs over three years of age maintained mainly outdoors in rural areas. About 33% of the cases were observed with clinical signs of heartworm disease and 81% had a history of not having left Canada.