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1.
四、不同温度环境下的光照管理光照管理方法依鸡舍构造是开放鸡舍还是密闭鸡舍而有很大差别。由于构造不同,鸡舍内的温度、湿度等环境条件自然也不同,因而,鸡的产蛋能力也受影响。例如,密闭鸡舍比开放鸡舍温差小,冬季温暖,受外界气温影响少,这当然也影响到鸡的产蛋模式。 相似文献
2.
夏季即将来临,家禽饲养管理人员应开始为炎热的夏季做好准备。 通风系统: 在炎热的夏天,太阳的辐射,鸡体代谢都造成热能的增加,使鸡舍内的温度提高。同时,鸡只通过呼吸系统和排泄系统排出大量水份使鸡舍内的湿度提高。鸡 相似文献
3.
在全封闭和高密度饲养的鸡舍中,数以万计的鸡密集在与外界隔绝的有限空间内,鸡的健康与生产力基本上处于舍内小气候的直接影响下,饲养成功的关键在于饲料与控温。其中,对温度的控制主要是通过调节通风（换气）量来进行的。如果换气不充分,鸡的排泄物所产生的有害气体（主要是ＮＨ３和Ｈ２Ｓ）浓度以及鸡呼吸产生的ＣＯ２浓度增高,会使鸡舍内温度迅速提高,这将造成鸡的发育不良或产蛋量减少。鸡舍内温度越高这种倾向越明显,严重时将造成鸡的大量死亡。采用变频调速器控制鸡舍内温度,取得了满意的效果,现报告如下:１温度调节回路（信号部分）… 相似文献
4.
冬季由于外界气温较低,养鸡户为了保持鸡舍内的温度,一般都将门窗密闭,减少通风,加之高密度饲养,使有害气体浓度升高,严重刺激鸡的呼吸系统,导致鸡的生产性能和抗病力下降.下面介绍控制鸡舍内有害气体的主要措施.1科学合理设计鸡舍 相似文献
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温度是影响蛋鸡生产性能的重要因素之一。适宜的温度，可以使蛋鸡发挥其正常的生产性能。温度过高或过低，都会影响蛋鸡的生产性能，从而影响生产者的经济效益。下面，笔者就高温季节对蛋鸡的饲养管理浅谈一下应注意的几个问题：1 降低鸡舍内部温度当周围环境温度高于33℃时，开放式鸡舍内温度一般要高于30℃，此时，蛋鸡饲养工作中就应该注意降低舍内和鸡舍周围环境温度，减少鸡只热应激，如：关闭鸡舍周围窗子，改横向通风为纵向通风；房顶喷水；在保证纵向通风情况下，加强带鸡喷雾消毒，这样既达到降温目的，又起到了消毒作用。2 增加鸡… 相似文献
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温度对鸡的生长、性成熟、受精、产蛋率、蛋重,蛋壳厚度等皆有影响。正确调整鸡舍内的温度,能使鸡充分利用其代谢能,从而达到产蛋高、耗料少的目的。一昼夜内对蛋鸡舍内的温度作如下调整,能提高蛋鸡产蛋率,降低蛋料比:(1)早开灯—上午11时:温度控制在18—21℃,温度较低,利于鸡采食。 相似文献
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高温下禽舍内鸡所产生之热和水气必须除去 ,如此才可使禽类能存活及增加生产力 ,高温下强迫通风有其必要性 ,特别是在自然风不足 ,禽舍内所养之鸡密度高的情况下 ,例如笼式蛋鸡及饲养种鸡之鸡场 ,强迫通风可以供应足够之风速通过鸡只 ,如此可以除去鸡舍内之热气和水气。隧道式通风是强迫通风之一种方法 ,通过鸡只之强风由鸡舍一端进入经过鸡舍而由风扇抽出。鸡身旁风之移动是解决鸡只热紧迫的最重要之方法 ,但是此时气温也是非常重要 ,当有一段时间气温高于鸡只表面温度时 ,鸡可因热应激而死亡。鸡只皮肤、羽毛温度约在30-40℃ ,气温必须避免在此温度或高于此温度。水帘上水分之蒸发冷却 ,可以减低鸡舍内温度 ,但增加鸡舍内之湿度。蒸发冷却已显示对高环境温度之下鸡是必须的 ,即使在湿度较高之环境下亦有效。水帘式蒸发冷却需要强迫通风和使鸡舍内产生负压 ,进而经由水帘吸入空气。本篇目的即在讨论隧道式通风和横跨式通风系统及水帘蒸发冷却之设计原则 相似文献
8.
正夏秋季节,气候炎热,鸡舍内外温差小,到了下午两三点钟,舍内温度甚至低于舍外温度,以通风的方式进行降温效果很差。因此,要保证鸡舍内合适的温度,必须依靠降温设备,通常使用湿帘墙加负压风机的方法进行降温。但是,如果安装和使用方法不当,反而会起反作用。经常检查湿帘,发现问题及时纠正处置,才能使湿帘发挥应有的作用。1温度表显示鸡舍内温度28℃,但是鸡仍然张嘴喘气鸡背风速过低,鸡只体感温度高。一定温度 相似文献
9.
一营养要全面:喂给混合饲料或配制饲料,供给足够而清洁的饮水,并在鸡舍内设置沙石箱,让鸡任意采食,使鸡获得全面的养份,可增强抗病能力,减少营养不良等代谢病的发生。二环境要舒适:保持鸡舍内适当的湿度、温度、通风和光照,使鸡在舒适的环境中生活,可防止感冒、支气管炎以及由此而诱发的其它疫病。三鸡舍要卫生:及时更换垫草和清除粪便,以减少因鸡粪分解产生的氨气,保持鸡舍内空气新鲜,防止通过垫草或粪便传播病原微生物和寄生虫。四入舍要消毒:鸡舍门前应设有消毒池。凡进入鸡舍人员必须经消毒池内走过,认真消毒鞋底,经济条件许可的,进入鸡… 相似文献
10.
一加强通风
鸡舍保持良好的通风换气,可排除舍内有害气体、尘埃和病原微生物,并可调节舍内温度,降低湿度,有助于鸡体表蒸发散热。当盛夏来临时,要排除鸡舍周围阻碍通风的障碍物。开放式鸡舍要昼夜打开门窗,使空气自由流通。有条件时还可在鸡舍内安装电风扇,在必要时开动电风扇,增加舍内与外界的空气对流,降低鸡舍内的温度与湿度。 相似文献
11.
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. 相似文献
13.
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. 相似文献
14.
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%). 相似文献
15.
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. 相似文献
17.
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. 相似文献
18.
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. 相似文献
19.
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%). 相似文献
20.
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. 相似文献
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