玉米秸秆黄贮饲料的调制

本文详细介绍了玉米秸秆黄贮饲料窖池的建立、黄贮饲料制作的方法、黄贮饲料品质的鉴定、黄贮饲料制作应注意的事项及其使用方法等方面的内容。该种方法适合广大农牧民养殖户利用秸秆进行家庭制作。     

应用火焰原子吸收法检测饲料中Cu、Zn、Fe、Mn、Mg应注意的几个问题

应用火焰原子吸收法检测饲料中Ｃｕ、Ｚｎ、Ｆｅ、Ｍｎ、Ｍｇ应注意的几个问题辽宁省兽药饲料监察所刘占宏，绳长敏目前饲料中微量元素的检测都广泛应用原子吸收分光光度法，采用这一方法其优点是方便快速，准确可靠。但利用这种方法检测饲料中的微量元素Ｃｕ、Ｚｎ、Ｆｅ...     

吸收系数法测定盐霉素钠的含量

用吸收系数法测定盐霉素钠的含量,可以不用标准品,在测定速度上较抗生素微生物检定法有优越性.经测定,盐霉素钠的吸收系数为443,经方法学验证并应用吸收系数法和法定的抗生素微生物检定法测定了10批样品的含量,结果无显著差异,证明该法可作为生产过程中的质量控制方法.     

力学计量仪器检定应注意的问题及对策探索

力学计量仪器是一种常见的检定仪器,在应用的过程中,需要保证使用方法的正确性.力学计量仪器应用的范围比较广,可以对力值、压力、振动等进行准确的计量.力学计量是在牛顿力学的基础上进行计量的,其在应用的过程中,相关体系在不断的完善.与传统的计量方式相比,力学计量有着较多的优点,其操作比较简单,而且花费的时间比较短,在计量测试中发挥着较大的作用.本文对力学计量仪器检定时应注意的问题以及对策进行了探讨,希望对相关人员提供一定帮助,保证计量结果的准确性.     

紫外可见分光光度计检定过程中的注意事项

<正>紫外可见分光光度计是通过测定被测物质在特定波长处或一定波长范围内光的吸收度,对物质进行定性和定量分析的仪器。在生物制药、精细化工、环境监测等领域有着广泛应用,并被纳入《中华人民共和国强制检定的工作计量器具明细目录》,需要根据检定规程定期检定。虽然目前检定机构在检定紫外可见分光光度计时均严格执行JJG178-2007《紫外,可见,近红外分光光度计检定规程》,但实际检定过     

奶牛日粮配方设计(上)

本文主要介绍了瘤胃微生物对反刍动物的重要作用以及在奶牛的日粮配制时应注意的事项。瘤胃微生物利用奶牛不能吸收利用的物质来分解合成奶牛可以吸收利用的营养物质,同时还为奶牛提供菌体蛋白质,其氨基酸组成成分与牛奶中氨基酸的组成最接近。在奶牛的日粮配制时,应注意实测值与理论值的差距,并通过观察日粮对奶牛的影响以及奶牛的信号来了解日粮的营养状况。     

池塘养鱼施肥应注意什么(上)

养鱼池塘中施肥的主要目的是调节水质,培育浮游生物,增加天然饵料,弥补人工蛋白质饲料不足。有机肥料如绿肥、粪肥、堆肥以及无机肥料都可以在鱼塘中施用。在施肥技术上,应注意以下问题。 (一)根据不同季节施肥 施肥分施基肥和施追肥两种。基肥可改良底泥的营养状况,底质贫瘦的池     

标准装置不确定度分析与评定的探讨

在标准装置的建标过程中,根据《测量不确定度的评定与表示》(JJF1059.1-2012)要求,应作出统一的不确定度的评定。本文根据现行国家仪表检定规程,探讨不确定度分析与评定方法。     

如何喂奶牛保护性脂肪

<正>保护性脂肪应用于奶牛,能提高奶牛产奶量,改善奶质,降低应激危害和提高奶牛的繁殖性能等。保护性脂肪喂奶牛好处多,是一项新技术,具体操作时应注意:1选择保护性脂肪产品的类型在实际生产中应选择保护性脂肪产品中碳链短的脂肪酸,因其进入肠道后吸收好,利用率高。还要注意选择不饱和脂肪酸,可比饱和性脂肪酸好吸收、效果好。若在生产中     

规模化养牛场地上式青贮池设计问题探讨

青贮池建设是规模化养牛场必备并且投资较大的工程。在分析青贮工艺对青贮池建筑要求的基础上,提出了地上式青贮池建筑设计的要点,并提出牛场建设环境影响评价中应评价青贮饲料流出液对环境影响的建议。     

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.