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1.
五台山草地自然保护区植物中铅元素含量的初探 总被引：3，自引：0，他引：3
初步研究了五台山草地自然保护区植物中铅元素含量及分布。结果表明，五台山区植物中铅元素的含量范围为末检出￣１５．６３ｍｇ／ｋｇ，平均含量为６．５４ｍｇ／ｋｇ；不同植被垂直带中铅含量以常绿针叶林带最低，亚高山草甸带最高；不同科植物中铅含量以莎草科植物最高，松科植物最低，草本，阔叶植物，灌木植物含铅量高于针叶植物。 相似文献
2.
《中国兽医杂志》2016,(2)
从吉林省吉林地区,延边地区.通化地区采集花尾榛鸡样本,分别取肝脏、肾脏、肌肉3种组织.采用加热浓硝酸高氯酸消化法消化各组织样品。测定以上组织中铅、镉、镍等重金属元素的含量。检验结果:组织中铅的含量以肝脏中最高,(0.5906±0.3452)mg/kg,肾脏次之(0.4045±0.1628)mg/kg,胸肌最低(0.1121±0.0146)mg/kg,组织中镉的含量以胸肌最高(0.2595±0.0472)mg/kg,肝脏次之(0.2205±0.0852)mg/kg,肾脏中最低(0.1929±0.1386)mg/kg,组织中镍的含量以肝脏中最高(0.7653±0.1524)mg/kg,胸肌次之(0.3990±0.2413)mg/kg,肾脏最低(0.1664±0.1683)mg/kg,组织样品中肝脏中少量铅超标,肝脏、肾脏中的镉也有不同程度超标,肝脏、胸肌中镍超标。 相似文献
3.
镉铅复合胁迫对桑苗生长与桑叶重金属含量的影响 总被引：2，自引：0，他引：2
桑树是湖南重金属污染耕地替代种植的代表性植物之一。以桑品种湘桑6号、湘7920、农桑14号、粤桑11号为试验材料,人为添加不同浓度梯度的镉、铅进行盆栽试验,研究镉、铅复合胁迫对桑苗生长及桑叶重金属含量的影响。结果表明:桑苗株高、节距、最大叶幅随土壤中镉和铅含量的提高而降低,桑叶镉、铅含量与土壤镉和铅含量呈正相关;以桑叶产量减少25%时所对应的土壤重金属含量作为桑树对镉、铅胁迫的耐受值,在本试验条件下,桑树对重金属污染土壤中镉、铅的平均耐受阈值分别为40. 88 mg/kg和527. 00 mg/kg。 相似文献
4.
铅锌尾矿区优势草本植物体内铅及氮、磷、钾含量变化特征 总被引：2，自引：0，他引：2
通过对铅锌尾矿区9种优势草本植物不同生长时期铅及氮、磷、钾含量分布特征及其相关性研究,结果表明,1)植物地上部氮、磷、钾含量均高于地下部,并随着生长时期的延长呈下降趋势; 2)在3个生长时期,9种优势草本植物均未表现出超富集铅的能力,但华中蹄盖蕨地下部能够囤积大量铅,最高含量和累积量分别达到15 542.1 mg/kg和41.81 mg/株; 3)除生长后期植物地上部氮、钾含量与铅含量存在显著的正相关关系(0.750*和0.773*)外,植物氮、磷、钾含量与铅含量在3个生长时期均未表现出显著的相关关系; 4)在植物生长前期,其地上部铅含量与地下部铅含量以及与生长旺盛期和生长后期的地上部或地下部铅含量均不存在显著的相关关系,而在生长旺盛期和生长后期,同一时期地上部和地下部铅含量之间以及不同时期地上部与地下部铅含量之间均存在显著或极显著的相关关系。 相似文献
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6.
铅在猪不同组织和器官中的富集状态 总被引：1，自引：0，他引：1
本试验旨在研究饲料中铅含量与猪组织和器官中铅含量的关系,及铅在猪各组织和器官中的分布规律,为制定猪可食用器官中铅含量限量标准提供理论依据.将24头大约克夏仔猪随机分为4组,分别饲喂含铅量为0.398mg/kg(对照组),6.095 mg/kg(低剂量组),17.49 mg/kg(中剂量组),51.674 mg/kg(高剂量组)的饲料,持续喂养90 d,屠宰、取其心脏、肝脏、脾脏、肺脏、肾脏、小肠、猪毛、猪皮、脂肪、猪血、骨髓、猪耳、猪舌、猪尾、里脊、臀尖、小排、后腿内,测定其中的铅含量.结果表明,随着饲料中铅含量的增加,猪体内各组织和器官中的铅含量均有不同程度的升高.对照组组织和器官中铅含量由高到低的次序为肾脏>脾脏>肝脏>毛发>其他组织和器官,其中肾脏、脾脏铅含量超标;3个给铅组组织和器官中铅含量由高到低的次序为骨髓>肾脏>脾脏>肝脏>毛发>猪尾>其他组织和器官;其中肾脏、脾脏、肝脏、猪尾均超标,但各组猪的肌肉、脂肪、猪皮、小肠等组织或器官中的铅含量较低,均符合国家标准<食品中污染物限量,GB 2762-2005>.表明随着饲料中铅含量的增加,猪组织和器官中铅的富集有所不同,其中骨髓、肝脏、肾脏和脾脏中的铅含量较高,猪皮、肌肉、脂肪、小肠、猪舌、猪心、猪肺等可食用组织和器官中铅的含量较低. 相似文献
7.
铅胁迫对草木樨抗氧化系统的影响 总被引：3，自引：0，他引：3
用盆栽法研究了重金属铅胁迫对草木樨Melilotus suavena中超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性,丙二醛(MDA)和体内铅含量的影响。结果表明:在0~1 500 mg/kg铅浓度梯度处理范围内,SOD、POD、CAT活性和MDA含量随铅处理浓度增加而上升。植株体内各器官的铅含量随外源铅处理浓度的增加而上升,根系铅含量与铅处理浓度呈正相关(R2=0.972**)。草木樨在29.942 g/kg的土壤铅浓度下仍能正常生长,体内最大铅积累量达654.93 mg/kg。根部铅的含量大于地上部总的含量,茎中的含量高于叶的含量。 相似文献
8.
猪肉猪肝中铅镉含量的测定 总被引：4，自引：0，他引：4
从上表可看出,猪肉中的铅和镉含量较低,分别极显著(P<0.01)和显著(P<0.05)低于猪肝中的含量。猪肉中铅含量在0.300mg/kg以下,镉含量均在0.050mg/kg以下,符合我国《无公害食品猪肉》(NY5029—2001)规定的铅和镉含量应低于0.50mg/kg和0.10mg/kg的要求。不同屠宰场间猪肉中的铅和镉含量基本一致,差异不显著(P>0.05),标准差也较小,说明猪肉中的铅和镉含量较为稳定。猪肝中的铅和镉含量极显著(P<0.01)和显著(P<0.05)高于猪肉,地区间也有较大差异。方差分析表明,雁江屠宰场和邛崃屠宰场的猪肝中铅含量极显著(P<0.01)高于井研屠宰场和蒲江屠宰… 相似文献
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10.
绵羊15只,随机分成三个试验组。对照组不投铅,两个处理组分别以15和30mg铅/kg体重/天的剂量投服醋酸铅12周。投铅前1周及投铅后每周剪取试验组羊毛,同时于颈静脉采血,羊中毒死亡或投铅结束时扑杀采取组织,用无火焰原子吸收分光光度法分别测定毛铅、血铅及组织铅含量c对测定结果经统计分析表明,毛铅及血铅含量与累计投铅量、累计投铅大数及组织铅含量显著相关.从而证实羊毛铅和血铅含量可作为绵羊铅中毒诊断和环境铅污染监测的指标,并初步认为绵羊出现铅中毒症状,毛铅含量高于1.1PPm,或血铅含量高于0.16μg/ml时,可诊断为铅中毒。血铅含量与每kg体重投铅量显著相关,毛铅含量则与此相关不显著,血铅含量的波动较大,故认为毛铅含量较能准确地反映绵羊的铅状况,在绵羊慢性铅中毒诊断和环境污染的监测上,其意义较血铅为大,而血铅含量变化灵敏,对急性铅中毒诊断意义较大。此外,测定了非铅污染区60例正常绵羊毛铅、血铅及其中25例的肝和肾组织铅含量:毛0.249±0.026PPm(0.067～0.970),血0.070±00.001μg/ml(0.023～0.144),肾0.820±0.060PPm(0.100～1.410),肝l.074±0.054PPm(0.610～1.210)。 测定5例正常羊左右侧臂部、肩带部及胸侧壁的13个区域的毛铅含量,结果差异不显著。 相似文献
11.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1985,26(10):323-327
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12.
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Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1984,25(9):347-350
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14.
Heartworm in dogs in Canada in 1982 总被引：8，自引：8，他引：0
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1983,24(7):227-229
15.
Owen J Slocombe D McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1986,27(9):324-328
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16.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(6):504-508
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
17.
Slocombe JO Villeneuve A 《The Canadian veterinary journal. La revue veterinaire canadienne》1993,34(10):630-633
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.
Slocombe JO McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1988,29(8):641-646
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.
Owen J Slocombe D McMillan I 《The Canadian veterinary journal. La revue veterinaire canadienne》1987,28(8):491-495
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