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1.
运动场草坪种植技术与管理对坪用质量影响的研究 总被引：3，自引：0，他引：3
在本试验的生境和管理条件下，以修剪高度，播种量，修剪次数和施Ｎ量为因素，利用４因素饱和Ｄ－最优设计，用模糊数学综合评判定草坪质量，最佳４因素水平为：修剪高度４．５ｃｍ，播种量１５ｇ／ｍ＾２，修剪次数５次／月，施Ｎ量６．７８ｇ／ｍ＾２。还建立了草坪质量与建坪４因素著相关的回归模型。 相似文献
2.
建坪与管理因素对运动场草坪密度影响的研究 总被引：6，自引：0，他引：6
以修剪高度、播种量、修剪频率和施Ｎ量为因素，利用四因素饱和Ｄ－最优设计，对运动草坪密度进行探讨，最佳四因素水平为，修剪高度４．５ｃｍ，播种量１５ｇ／ｍ＾２，修剪频率５次／月，施Ｎ量６．７８ｇ／ｍ＾２。并建立了草坪密度与建坪四因素显著相关的回归模型。 相似文献
3.
马尼拉草坪管理—施肥与修剪 总被引：6，自引：0，他引：6
施肥与修剪是马尼拉草坪管理中的两个重要措施。施肥以Ｎ肥为主，配施Ｐ、Ｋ肥，Ｎ、Ｐ、Ｋ的比例为５：３：２，其中每年的施Ｎ量为８５￣１３５ｋｇ／ｈｍ＾２。马尼拉草生长较慢，每年修剪次数为５￣６次。施肥与修剪主要在夏了结合在一起进行。 相似文献
4.
草坪杂草化学防除研究初报 总被引：6，自引：0，他引：6
防除草坪中双子叶杂草用７２％的２，４－Ｄ丁酯０．７５￣０．９８ｋｇ／ｈｍ＾２或７２％的２甲４氯１．５ｋｇ／ｈｍ＾２，株防效为８６．２％￣９６．９％；防除草坪中单子叶杂草可根据草坪的建植年限及草坪草的高度选用１２％的恶草灵３．６￣４．２ｋｇ／ｈｍ＾２或１２．５％的拿扑净０．９ｋｇ／ｈｍ＾２，防效为８６％￣９４．９％；同时防除单、双子叶杂草用恶草灵复配剂３．２￣４．０ｋｇ／ｈｍ＾２或拿扑净复配剂１．７ 相似文献
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冷地早熟禾种子生产的优化栽培技术研究 总被引：2，自引：0，他引：2
采用３因素５水平二次回归正交组合设计试验,建立了冷地早熟种子产量（Ｙ）与播种量（Ｘ１）、行距（Ｘ２）和施肥量（Ｘ３）的回归方程：Ｙ＝４２．６１＋５．０１Ｘ１－７．８１Ｘ２＋７．７７Ｘ３＝２．２１Ｚ１Ｘ２＋１．４１Ｘ１Ｘ３－０．４１Ｘ２Ｘ３＝４．６４Ｘ１＾２＋６．３６Ｘ２＾２＋８．５６Ｘ３＾２;并提出西宁地区冷地早熟禾种子生产的优化农艺措施,播咎量８ｋｇ／ｈｍ＾２,播种行距２０－３０ｃｍ,种肥１５０ 相似文献
7.
１ 控肥技术 控肥主要指控制施肥总量和氮肥的用量。以温州蜜柑为例,原以高产为目标的Ｎ、Ｐ_２、Ｋ_２Ｏ每 ６６６．７ｍ２使用总量为 １００～１２０ｋｇ,比例为１：０．５：０．５,每６６６．７ｍ２产量可达３～５ｔ。现以优质为目标的施肥总量每 ６６６．７ｍ２调减到８０～１００ｋｇ,Ｎ、Ｐ_２Ｏ_５、Ｋ_２Ｏ比例为１：１．２～１．５：１．２～ｌ．５。本地早等高肥品种用肥总量较温州蜜柑高,且适当提高Ｎ的比例。施肥时间于６月下旬到８月下旬、１０月中旬到１１月上旬分２～３次施入。一般夏肥株施进口三元复合肥０,６～０… 相似文献
8.
施肥对草地早熟禾草坪质量的影响 总被引：23，自引：0，他引：23
本试验是以不同施肥水平对建植四年的草地早熟禾草坪质量指标的影响进行了研究。结果表明,在四种施肥处理中,草地早熟禾的生长速度随着施肥量的增加而提高。施肥改善了草地早熟禾的以不同颜色,但同时降低了草坪的整齐度,加重了病害。综合考虑应采用每次每平米５克氮,３．３克Ｐ２Ｏ５和３．３克Ｋ２Ｏ或１０克氮,６．７克Ｐ２Ｏ５和６．７克Ｋ２Ｏ的施肥水平。其中每次每平米１０克氮,６．７克Ｐ２Ｏ５和６．７克Ｋ２Ｏ的施肥 相似文献
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猪细小病毒生物学特性研究 总被引：2，自引：0，他引：2
应用ＰＫ－１５传代细胞复制猪细小病毒（ＰＰＶ）参考株ＮＡＤＬ－２和云南分离株ＫＭ，研究得出细胞培养物半数细胞感染量分别为１０＾－７．９／ｍｌ和１０＾－６．８／ｍｌ经ＣｓＣｌ密度梯度离心，两种病毒颗粒其浮力密度值分别为１．３３ｇ／ｃｍ＾３和１．３９／ｃｍ，电镜观察病毒粒子呈圆形，直径约２０ｎｍ。ＳＤＳ－聚丙烯酰胺凝胶电泳（ＳＤＳ－ＰＡＧＥ）分析，表明纯化的ＰＰＶ细胞培养毒，主要含两种蛋白成分，分子量 相似文献
10.
马鹿血液某些生理生化成分的测定 总被引：1，自引：0，他引：1
采用常规方法测定高原地区马鹿血液生理生化成分表明；１．红细胞数１３．８０±１．７１个／Ｌ，平均红细胞体积４４．９９±７．７８μｍ＾３；平均红细胞血红蛋白１４．７２±２．４９ｐｇ，平均红细胞血红收白浓度３２．７４±３．１８％。２．血清总蛋白，糖，总脂和胆固醇分别为７３．２９±５．１９ｇ／Ｌ，４．６±９．３ｍｍｏｌ／Ｌ，３．２９±１．１３ｇ／Ｌ和２．９９±０．６３ｍｍｏｌ／Ｌ。３血清Ｎａ＾＋，Ｋ＾＋， 相似文献
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Ovine scrapie was first recorded in Cyprus in 1985. Subsequently four dairy goats kept in two mixed flocks with affected sheep developed characteristic clinical signs similar to those seen in sheep. Fifteen goats from the two flocks were examined histologically and neurological lesions consistent with a diagnosis of scrapie were found in the four animals and in three others which had subsequently developed early neurological signs. These lesions were similar to those of naturally-affected sheep although neuronal degeneration and vacuolation were more severe in some cases. 相似文献
13.
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14.
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
15.
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16.
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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
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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