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1.
通过3年对29个牧草品种物候期、适应性能、产量、主要营养成分、再生性能等进行的试验研究,在酉阳县3个不同海拔高度共筛选出20个优良牧草品种,其中豆科6个、禾本科11个、其他科3个。这些牧草产量高、适应性强、营养价值高,可作为喀斯特地貌型区域人工草地建植、天然草地改良的主打草种,可进行大面积推广。 相似文献
2.
通过3年在3个不同生态环境条件下对57个牧草品种的干物质产量、主要营养成分、茎叶比例、抗逆性和适口性等指标进行观测,筛选出在温带环境条件下优良的豆科牧草9个、禾本科9个;在中亚热带环境条件下优良的豆科牧草8个、禾本科5个;在南亚热带环境条件下的优良豆科牧草4个、禾本科5个.这些牧草品种的干物质产量高,适应性强,可为相似生态环境条件下建植优良的人工草地提供可靠的品种使用依据. 相似文献
3.
通过3年在3个不同生态环境条件下对57个牧草品种的干物质产量、主要营养成分、茎叶比例、抗逆性和适口性等指标进行观测,筛选出在温带环境条件下优良的豆科牧草9个、禾本科9个;在中亚热带环境条件下优良的豆科牧草8个、禾本科5个;在南亚热带环境条件下的优良豆科牧草4个、禾本科5个。这些牧草品种的干物质产量高,适应性强,可为相似生态环境条件下建植优良的人工草地提供可靠的品种使用依据。 相似文献
4.
2004-2006年,对古浪县北部腾格里沙漠南缘荒漠化草地进行为期3年的围栏封育改良试验.结果表明,围栏封育措施对恢复草地植被效果明显.围栏封育后草地中植物的高度、盖度、多度、冠幅、地上生物量和可食牧草产量等生产性能明显提高;牧草成分显著变化,优良莎草科、禾本科牧草产量与种类增加,杂类草种类与产量下降;围栏封育区区域生... 相似文献
5.
1998—1999年,在临汾地区引入7个草坪草品种和6个牧草品种进行栽培、评价。草坪草品种中。草地早熟禾适宜在该地区种植,尤其是BarVB5649。牧草品种中。多花黑麦草生长快。产量高,但不耐旱、不抗寒,大田推广有困难。苜蓿抗寒耐旱。3个供试品种Baraffa54,Sanditi和Sitel均适宜大面积种植。 相似文献
6.
采用田间小区对比试验,观测比较各种牧草的生育期、植株高度、单株分蘖(分枝)数、牧草产量,筛选适合毕节地区各县市种植、产量较高的牧草品种。结果表明:11个参试品种中,紫花苜蓿、多花黑麦草、红三叶、墨西哥玉米、高丹草的产量较高,可在毕节地区养殖小区和大户中推广应用,从而解决规模养殖中草料不足的问题;多年生黑麦草、鸭茅、白三叶和高麦草等品种只能添加于建植放牧型草地,而高羊茅和百脉根则不适宜在毕节地区推广。 相似文献
7.
在海南州草地资源调查的基础上,对各类型天然草地的盖度、可食牧草产量、牧草利用率、草群中优良牧草比率等指标,应用主成分分析法,对海南州天然草地典型的23个草地型进行综合评价,将海南州天然草地分为3个等级,并用灰色关联度分析方法进行对比。结果表明,两种评价方法得出的结论基本一致。 相似文献
8.
采用混合选择法,育成抗寒、抗病、种子产量高的老芒麦新品种康巴老芒麦。其牧草青绿期长、抗寒、耐旱、抗病、抗倒伏,种子成熟期集中。试验通过品种的育种过程、特征、特性和生产性能。其品种干物质较对照提高15%,种子产量高于对照川草2号品种20%,适应川西北高寒牧区及类似地区种植,是建立人工草地、改良天然草地和生态建设的优良牧草。 相似文献
9.
采用混合选择法,育成抗寒、抗病、种子产量高的老芒麦新品种康巴老芒麦。其牧草青绿期长、抗寒、耐旱、抗病、抗倒伏,种子成熟期集中。试验通过品种的育种过程、特征、特性和生产性能。其品种干物质较对照提高15%,种子产量高于对照川草2号品种20%,适应川西北高寒牧区及类似地区种植,是建立人工草地、改良天然草地和生态建设的优良牧草。 相似文献
10.
采用田间小区对比试验，观测比较各种牧草的生育期、植株高度、单株分蘖（分枝）数、牧草产量，筛选适合毕节地区各县市种植、产量较高的牧草品种。结果表明：11个参试品种中，紫花苜蓿、多花黑麦草、红三叶、墨西哥玉米、高丹草的产量较高，可在毕节地区养殖小区和大户中推广应用，从而解决规模养殖中草料不足的问题；多年生黑麦草、鸭茅、白三叶和高麦草等品种只能添加于建植放牧型草地，而高羊茅和百脉根则不适宜在毕节地区推广。 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 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
18.
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
19.
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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