中国西南岩溶地区的植被资源

简要介绍了中国西南岩溶地区的植被资源概况,西南岩溶地区主要的地带性植被是亚热带常绿阔叶林,由于当地特殊的地质(如岩溶发育、山地、河谷等)、气候条件以及人类活动的干扰,灌丛、灌-草丛和草丛(草甸)等成为现状植被的主要类型.在人为干扰条件下,灌草丛和草丛群落具有一定的稳定性.     

红豆草等热带,亚热带牧草引种试验

西南低海拔热带河谷地带是人工草场的空白地带，本文试图就红豆草等热带、亚热带牧草１２个品种在此区内的适应性作出对比，便于今后引种和大面积扩种。     

攀枝花地区优质蜜源——鸡骨杆

攀枝花市位于我国西南，处在四川省西南角，这里属横断山脉峡谷地段干热河谷季凤气候，山高坡陡，立体气候明显。日照长无霜期短，生物多样性和植被保存良好。野生蜜粉源植物丰富，在众多的野生蜜粉源植物中，鸡骨杆一枝独秀，在攀枝花市及米易县有一定量的零星成片分布，由于此植物较稀少，所产蜂蜜数量少。如何利用好这一优良蜜源，以便更多的人能享受到这一特色蜂蜜，是我们需尽快解决的问题。     

秸秆饲料在畜草产业发展中的应用

渭源县位于甘肃省中部,地处黄土高原与西秦岭的交汇地带,是古老渭河的发源地。地势东北低,西南高,海拔1930-3941m,境内地形地貌较为分明,从北向南依次为北部黄土梁峁沟壑区,中部浅山河谷区和南部高寒土石山区三个区域。     

实施蚕桑生态产业化工程 促进万州蚕桑发展

万州区位于重庆市东部,地处长江中上游结合部,属三峡库区腹心地带.长江由西南向东北横贯本区,流程83公里.全区幅员面积3457平方公里,辖62个乡镇、1098个村.总人口164.05万人,其中农业人口131.26万人.耕地面积108047公顷.海拔高度相差悬殊,在107.5～1700米之间.蚕区主要分布在海拔200～800米的中低山和沿江河谷地区.万州区蚕桑生产历史悠久,明清时代发展迅速,特别是解放以后,在党和政府的领导下,蚕桑生产以前所未有的速度发展壮大.     

关于大豆高产栽培技术模式区域化布局的概况阐述

本文根据黑龙江省绥化市的地势东北高，西南低，即由低丘陵、高平原过渡为河谷平原的特点。以全市地貌按其形态特征可分为低山丘陵、岗丘状高平原、岗阜状高平原、微倾斜高平原、一级阶地、高漫滩和低漫滩的独特的地理位置。将本地区的大豆模式化布局概况进行阐述。     

地方猪种可持续利用途径的探讨

云南地处西南边陲,低纬度高海拔,独特地形地貌,众多的民族聚居地,形成了丰富的猪种资源,有高原型的迪庆藏猪、华南型的滇南小耳猪、西南型的大河猪、撒坝猪和保山猪,以及高黎贡山猪(明光小耳猪)[1].     

丘陵山区动物检疫模式探讨

三门峡市位于河南省西部,豫、晋、陕三省交界处.境内地势西南高,东北低,差异明显,地表形态复杂多样,有山地、丘陵、河谷、平原多种类型,大体为"五山四陵一分川",复杂的地形地貌决定了畜牧商品经济发达程度的不同,同时也决定了动物检疫工作开展不平衡性.为了全面落实动物检疫"四到位"目标,自一九九八年以来,我们着力对丘陵山区动物检疫模式进行探讨,经过近5年的实践,摸索出了一套行之有效的办法,现总结如下,愿于广大同仁交流与探讨.     

凉山州动防体系建设的现状及发展思路

凉山州是我国最大的彝族自治州，又是攀西地区的重要组成部分。位于四川省西南部，青藏高原东南部，属横断山脉、攀西大裂谷地带。由于地形复杂．立体气候明显，呈现出河谷南亚热带、中亚热带、北亚热带、山地暖温带、山地凉温带、高山寒冷带等多种不同的气候带。具有发展畜牧业得天独厚的自然条件。     

金沙江干热河谷地区“三高”蚕业研讨

<正> 地处四川西部的攀西干热河谷地区,属典型的南亚热带季风气候,因受印度洋西南季风气候影响,旱、雨季分明,具有气候温和、日照充足、雨量丰富、年温差小。昼夜温差大,冬暖夏凉等气候特征,有利于蚕桑生产和优质高产商品茧基地建设。经过近十年的发展,蚕桑生产在该地区已有一定规模,是农业经济骨干项目之一。     

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 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 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 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 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.

     

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 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.