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1.
鱼粉是饲料中不可或缺的优质动物蛋白源,蛋白质含量高且品质优良,富含多种微量促生长成分。我国鱼粉主要依靠进口,且价格昂贵,长时间大比例使用会对养殖生产者造成沉重的压力,寻找可替代资源就成为一个亟待解决的问题。目前,生产中的鱼粉替代品主要围绕豆粕、大豆浓缩蛋白、棉籽蛋白等与鱼粉具有类似特点的优质蛋白原料开展研究,并取得初步成效。文章主要就鱼粉替代品的开发与应用研究做一综述,为新型蛋白原料的评价与利用提供参考。 相似文献
2.
蛋白质是水产动物生长的重要营养元素，也是影响饲料成本的重要因子。而作为水产动物饲料的重要蛋白源-鱼粉，由于其资源量下降，价格昂贵，致使饲料成本过高。因此，寻找新的替代鱼粉的蛋白源，引起了养殖业的关注。一些学者通过动植物蛋白比的研究，发现鱼类、虾以及蟹饲料中适宜的动植物蛋白比有利于动物的生长。相反饲料中的动物蛋白比例过高，并不能取得较好的养殖效益。 相似文献
3.
蛋白质是水产动物生长的重要营养元素,也是影响饲料成本的重要因子。而作为水产动物饲料的重要蛋白源——鱼粉,由于其资源量下降,价格昂贵,致使饲料成本过高。因此,寻找新的替代鱼粉的蛋白源,引起了养殖业的关注。一些学者通过动植物蛋白比的研究,发现鱼类、虾以及蟹饲料中适宜 相似文献
4.
鱼粉是水产饲料中不可缺少的优质蛋白源。但随着集约化养殖的迅猛发展，鱼粉的需求量急剧上升。然而，由于过度捕捞及厄尔尼诺等现象的影响，世界鱼粉的总产量正逐年下降，严重制约了水产养殖业的进一步发展。找到能部分或完全替代鱼粉的蛋白源已成为水产动物营养研究中的一个热点。文章综述国内外在水产养殖中用不同蛋白源替代鱼粉的研究现状，以期为水产饲料的科学配制提供理论依据。 相似文献
5.
鱼粉是水产动物饲料蛋白质的主要原料，但全球鱼粉供应量逐年下降，难以满足水产业的需要。本从动物性蛋白源、植物性蛋白源和单细胞蛋白源等几方面综述了鱼粉替代物在水产动物营养中的应用。 相似文献
6.
罗非鱼是我国南方最重要的水产养殖品种之一,而且近年来养殖规模迅速发展。但由于鱼粉价格昂贵而且鱼粉中含有较多的磷而不能被鱼类利用,因此,用植物蛋白质替代鱼粉成为最近动物营养与饲料研究的热点。蛋氨酸是罗非鱼饲料中所必需而植物蛋白质中含量不足的第一限制性氨基酸。所以,利用植物蛋白质源替代罗非鱼饲料中的动物蛋白质源,需要补充蛋氨酸以满足鱼类的生理需要。本文就罗非鱼对蛋氨酸等研究进展作一综述。 相似文献
7.
蛋白质是鱼类生长的主要营养物质,水产饲料配方中蛋白质含量一般是畜禽饲料中的2~4倍,通常占配方的25%~50%,甚至更多。因此,作为水产动物重要的蛋白源的提供者——鱼粉在水产饲料配方中占有重要的作用。然而,一方面由于全球气候变化、环境恶化和过度捕捞等造成渔业生物资源衰退,鱼粉获量越来越少;另一方面,近几年鱼粉的消费结构发生了很大的变化,水产养殖产量的提高,鱼粉市场需求旺盛,导致鱼粉价格不断上涨。鱼粉短缺已成为全球水产饲料工业面临的最大难题之一。鱼粉源于自然资源,在需求总体增长的情况下,鱼粉趋少、趋贵的走势在所难免,要维持以鱼粉为主要蛋白源的水产养殖业稳定的、持续的发展,开辟鱼粉替代品迫在眉睫。大量的研究资料表明,用丰富的动植物蛋白源、单细胞蛋白源和藻粉部分或完全代替鱼粉是可行的。本期我们邀请了厦门大学教授艾春香以"鱼粉替代——鱼粉高价运行下水产配合饲料研发的技术对策"为题,分三个方面就鱼粉替代的必要性及可行性、鱼粉替代的技术方案和鱼粉替代研究与应用存在的问题进行了深入的论述,相信会给行业同仁带来启迪和借鉴。 相似文献
8.
鱼粉供应资源短缺,价格日益高涨,严重制约水产养殖业的可持续发展。我国新型非粮蛋白源资源丰富,种类繁多,具有可持续性强、营养价值高等特点,但在水产饲料中的应用并未得到充分挖掘。黄粉虫（Tenebrio molitor）具有蛋白质含量高、氨基酸组成均衡等优点,其虫粉是一种颇具潜力的优质非粮蛋白源。文章对黄粉虫粉的营养特性及其替代鱼粉对水产养殖动物的生长性能、肉品质、消化功能、免疫功能和抗氧化能力的影响进行概述,旨在为合理开发和应用新型非粮蛋白源提供参考。 相似文献
9.
断奶仔猪对其日粮质量要求很高,需要大量的优质蛋白质,目前鱼粉的价格日益上涨,使得仔猪饲料价格一直居高不下,因此需求一种优质的适用断奶仔猪的蛋白质,来替代动物蛋白成为动物营养研究与饲料开发的热点。 相似文献
10.
传统上,鱼粉一直是鱼、虾饲料中的主要蛋白源。由于水产养殖业的迅猛发展,鱼粉供不应求的状况将会发生。因此,饲料生产者不得不寻求替代鱼粉的蛋白原料,未来的鱼虾饲料将会主要由植物蛋白原料组成。大豆浓缩蛋白目前看来是各种植物蛋白中的首选,因为该产品含有平衡的氨基酸组成和极高的蛋白质消化率。实践证明大豆浓缩蛋白是替代鱼粉的优质蛋白原料。 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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