绵羊舍饲好处多

(一)舍饲符合绵羊的生活习性 绵羊不象山羊那样活泼好动、喜游走、行动敏捷、善于攀登。绵羊胆小怕惊,性情懦弱,喜欢安静环境。所以,绵羊更适合舍饲。在舍饲条件下,受其他外界环境因素的影响小,绵羊不易受惊,能安静地采食和反刍,有利于消化液分泌,可提高饲料消化率,容易上膘。 (二)舍饲能量消耗少,经济效益高 农区、半农半牧区,一般远离牧草丰盛的草原、草山等天然草场。放牧饲养绵羊,虽然能节省种草、割草等财力和人力支出,但绵羊在放牧过程中要走好多路,运动中要消耗很多体能,况且天然牧草的营养价值较低,不如在离村较近的农田种植优…     

“三合一肥牛羊”饲料添加剂对绵羊育肥试验

利用“三合一肥牛羊”饲料添加剂,在舍饲条件下,对短期育肥绵羊的增重试验结果表明：试验期４５天内,试验组绵羊的日增重２４０．７ｇ,对照组日增重１７０ｇ,试验组平均每日每只羊多增重７０．７ｇ,多盈利２０．７７元,比对照组提高７８．３％。     

提高牛饲料效率的方法

近15-20年间,肉牛业在提高饲料效率方面取得了较大进展。主要是提高舍饲肥育牛的谷物饲料利用率,包括:饲料添加剂的应用;弄清了酸中毒的机理和利用淀粉的生理机制;减少以谷物为主日粮中粗饲料的用量。饲料添加剂饲料添加剂的应用是降低饲料成本的有效方法之一。舍饲肉牛现在可用的主要的非营养性饲料添加剂有3类:离子载体、抗生素(用于减少肝脓肿)和发情抑制剂。离子载体离子载体属抗生素类,有降     

使用维生素添加剂须注意的问题

工厂化饲养的家畜和高生产性能的家畜日粮中必须添加维生素,以平衡家畜的营养。不同品种和品系的畜禽所需维生素量是不同的,生长快和产量高的需要量大。例如:生长快的仔鸡会因生物素、叶酸、烟酸和胆碱等缺乏而发生腿病。完全舍饲而不放牧的猪与家禽对维生素和矿物质需求量很大。维生素添加剂只占家畜饲料的0.1％,占猪、鸡等饲料成本的1～2％。维生素添加剂用量主要根据日粮和家畜生长的需要决定。使用维生素添加剂需注意以下问题: 1.饲料中维生素含量及生物可利用性的变化     

中草药饲料添加剂在绵羊生产中的研究进展

主要综述了中草药饲料添加剂在绵羊生产中的运用效果,以及开发应用中草药饲料添加剂存在的问题和发展前景,为中草药饲料添加剂在绵羊生产中的应用和进一步研究提供参考。     

脂肪酸钙在绵羊育肥生产中的应用

脂肪酸钙是一种专门用于反刍动物的高能饲料产品,有效能值高,具有过瘤胃保护特性。近年来,国内主要集中于奶牛的生产应用,而在绵羊饲养上的研究较少。为此,笔者在舍饲育肥羔羊饲粮中添加脂肪酸钙,研究了脂肪酸钙不同浓度梯度含量日粮对羔羊日增重、饲料转化率的影响,为其推广提供参考。     

介绍几种饲料配合添加剂成分和用量

一、绵羊饲料添加剂每千克绵羊饲料配合添加剂,包括下列有效成分:维生素 A10国际单位;维生素 D_32国际单位;维生素 E15克;钴0.3克;铜3克;铁60克;锰40克;碘1克;锌40克。用量:每吨绵羊饲料,应加入1千克饲料配合添加剂。二、乳牛饲料添加剂每千克乳牛饲料配合添加剂,包括下列有效成分:维生素 A10国际单位;维生素 D_32国际     

2003年《饲料研究》总目次

轻舟已过万重山顾　鹏　 1.1…………………………………………科学试验与研究不同铁添加剂对母猪生产性能的影响刘鹤翔　黄生强　夏明波　 1.2…………………………………预混料及不同精料给量对舍饲小尾寒羊育肥效果的研究魏全意　吴金龙　丁永忠等　 1.5………………………………烟酸对泌乳中期奶牛产奶性能的影响孙国君　邹阿玲　陆良等　 1.8…………………………………群体有益微生物饲料添加剂在肉鸡中的应用效果翟　维　呙于明　袁建敏等　…………………………………益微魔芋飞粉基质饲料对生长育肥猪肉质的影响江　萍　夏先林　李…     

舍饲条件下不同品种绵羊的适应性观察

宁夏某羊场引进肉用绵羊821只,经过对引进肉用绵羊和当地绵羊所产羔羊的生长发育性能、繁殖性能及生理指标等的临床观察和测定,结果表明:在全舍饲条件下,引进的肉用绵羊的各项生产性能指标均达到或高于原产地的水平,反应了全舍饲条件下饲养引进的肉用绵羊,对其生长发育、繁殖性能、生产性能以及遗传性能没有任何不良影响。     

天然物饲料添加剂对肉仔鸡生产性能的影响

研究天然物饲料添加剂在日粮中替代抗生素对肉仔鸡生产性能的影响.对照组饲喂基础日粮(1组);抗生素组添加50 mg/kg的杆菌肽锌(2组);用小茴香、肉桂、干姜、甘草、山植、神曲和麦芽等天然物按比例制作成饲料添加剂,在试验组基础日粮中分别添加0.5 %、1 %、1.5 %和2 %(分别为3组、4组、5组和6组)天然物饲料添加剂.结果表明:抗生素组和不同水平天然物饲料添加剂各组均能改善肉仔鸡各期的生产性能.从全期看,天然物组后期的生产性能优于抗生素,以1.5 %添加水平最好,但差异不显著.试验说明,添加天然物饲料添加剂能提高肉仔鸡的生产性能,可替代抗生素使用,添加水平以1 %～1.5 %为宜.     

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 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 1991

In late November 1991, 1883 clinics in Canada were sent a questionnaire to assess the status of Dirofilaria immitis in dogs in 1991 and there was a 60.0% response. There were 344,031 dogs tested for heart-worm (HW), 627 were found infected and the prevalence of HW infection was 0.18%. There were 417 dogs with HW in Ontario, 116 in Manitoba, 38 in Quebec, 53 in British Columbia, three in Alberta, and one in Nova Scotia. In British Columbia, all of the infected dogs but one were from the Okanagan valley which, as from 1991, is a new focus of infection in Canada. Most dogs with HW had not been on preventive medication in 1990, and the prevalence among dogs tested and unprotected was 0.59%. That prevalence was considerably higher in endemic areas. Companion dogs, over three years of age and maintained primarily outdoors in rural areas, were most frequently infected. One cat was diagnosed with D. immitis and 33 dogs had Dipetalonema reconditium.     

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 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.