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1.
本试验旨在研究高产奶牛日粮中添加反刍专用酵母对奶牛产奶量、乳成分和乳中体细胞数的影响。选择40头高产荷斯坦牛,分为试验组和对照组,对照组饲喂基础日粮,试验组在基础日粮的基础上添加反刍专用酵母50g/(头·d),试验期共27d,预期7d,正试期20d。结果发现,对遭受热应激的两组奶牛,试验组日产奶量降幅显著低于对照组,日产奶量相对于对照组增加了6.5%(P<0.05);整个试验期试验组体细胞数下降了3.68万/m L,而对照组增加了27.67万/m L,差异显著(P<0.05);两组奶牛的乳成分无明显的差异(P>0.05)。提示在高产奶牛日粮中添加反刍专用酵母可以提高奶牛的日产奶量和降低体细胞数,但对乳成分没有显著影响。 相似文献
2.
试验研究在日粮TMR中添加酵母培养物对奶牛生产性能的影响,选择产奶量、胎次、泌乳天数相近的高产泌乳奶牛200头,随机分成2组,对照组和试验组采用同一TMR配方日粮,试验组每天早班向TMR日粮车中添加酵母培养物AYC-X6,前7 d平均添加量160 g/(头·d),接下来5 d平均添加量120 g/(头·d),之后每天平均添加量100 g/(头·d)。结果表明:在高产泌乳奶牛全混合日粮TMR中添加酵母培养物AYC-X6,能促进奶牛瘤胃消化、提高饲料转化率、改善粪便性状;能提高奶牛产奶量,试验组奶牛的平均产奶量比对照组多7.81 kg/(头·d),同比提高28%(P0.01);添加酵母培养物能够提高饲料转化率,增加养殖户的经济效益。 相似文献
3.
本试验旨在研究酵母培养物(赛克灵100)对荷斯坦奶牛产奶量及乳品质的影响。选用100头荷斯坦奶牛,按年龄、胎次、日产奶量和乳成分相近的原则,随机分为对照组和试验组,对照组饲喂基础饲粮,试验组饲喂在对照组日粮的基础上添加20g/头·d的酵母培养物,预饲期为7d,正式试验期为30d。试验结果表明,饲料中添加酵母培养物可以显著改善奶牛的产奶性能,改善乳成分,降低牛乳中的体细胞含量。 相似文献
4.
本试验旨在研究泌乳高峰期奶牛日粮中添加反刍专用酵母对奶牛消化率和产奶量的影响。选取泌乳高峰期奶牛56头进行饲养试验,按照初始产奶量、泌乳天数、胎次相近的原则,将试验牛随机分为酵母组和对照组,对照组饲喂基础日粮,酵母组在对照组基础上添加反刍专用酵母20g/(头·d),试验共持续27d(预试期6d,正式期21d)。结果显示:1在粪样取样量相同的情况下,酵母组第一层粗饲料残留量降低了38.59%、棉籽+碎玉米颗数明显减少,对照组无明显变化;2饲喂反刍专用酵母21d后,试验组产奶量较对照组高出1.14kg/(头·d),每天每头多增加2.81元收入。综上所述,添加反刍专用酵母可以有效改善饲草料消化率,促进营养物质消化吸收,提高泌乳高峰期奶牛单产水平,增加经济效益。 相似文献
5.
本试验旨在研究酵母培养物(商品名:赛克灵100)对荷斯坦奶牛产奶量及乳品质的影响。选用100头荷斯坦奶牛,按年龄、胎次、日产奶量和乳成分相近的原则,随机分为对照组和试验组,对照组饲喂基础饲粮,试验组饲喂在对照组日粮的基础上添加20g/(头·d)的酵母培养物,预饲期为7d,正式试验期为30d。试验结果表明,饲料中添加酵母培养物可以显著改善奶牛的产奶性能,改善乳成分,降低牛乳中的体细胞含量。 相似文献
6.
本试验旨在研究酵母细胞壁对泌乳早期荷斯坦牛生产性能、换料应激的影响。试验按泌乳天数、胎次、体重相近的原则选取两群牛(试验组98头牛,对照组93头牛),研究日粮中添加100g/(头·d)剂量的酵母细胞壁,以及试验第21天后更换原料玉米对奶牛产奶量、乳成分指标、牛奶酸度的影响,试验共进行42d。结果显示:(1)添加酵母细胞壁可以提高奶牛换料应激后产奶量的恢复速度,提升产奶量,试验组全程平均产奶增量比对照组高出0.90kg;(2)添加酵母细胞壁对乳品质及牛奶酸度无显著影响。结果表明,添加酵母细胞壁可以提高泌乳早期奶牛的产奶量。 相似文献
7.
为探究反刍动物专用活性酵母产品对奶牛生产性能、乳品质及健康情况的影响,选择高产奶牛(48头),分为对照组(24头),试验组(24头);中产奶牛(120头),分为对照组(96头),试验组(24头),高产组和中产组的对照组均饲喂基础日粮,试验组在基础日粮上均添加活性酵母80 g/天·头。试验从2016年3月13日至2016年4月18日,共计5周,期间测定采食量、乳成分等指标。试验结果表明,活性酵母产品对高产奶牛采食量没有显著影响,但能够显著提高奶牛平均产奶量(2.3 kg/天·头),能够显著提高日粮转化效率(8%)。整个试验期内,活性酵母产品组产奶量均高于对照组,随着时间延长对照组和试验组均呈下降趋势,但活性酵母产品组下降速度显著低于对照组;活性酵母产品对中产奶牛的采食量没有显著影响,能够显著提高中产奶牛产奶量(2.4 kg/天·头),随着泌乳时间延长,对照组的产奶量呈显著下降趋势,活性酵母产品组能够延长泌乳中期时间,并具有一定提高作用;在乳品质方面,活性酵母产品能够改善乳品质,但差异不显著,同时能够降低牛奶中体细胞数,减缓奶牛疾病的发生。综上,活性酵母产品能够显著提高高产、中产奶牛产奶量,延长高、中期奶牛泌乳时间,同时具有改善乳品质和牛群健康状况的功能。 相似文献
8.
试验旨在研究纽润康酿酒酵母培养物对奶牛的干物质采食量、产奶量及血清指标的影响。试验组和对照组各300头奶牛,对照组奶牛饲喂基础日粮,试验组奶牛在基础日粮基础上添加120 g/(头·d)酿酒酵母培养物。结果显示,试验组奶牛产奶量显著提高1.66 g/(头·d),平均干物质采食量显著提高0.72 g/(头·d)。试验组奶牛血清中谷丙转氨酶活性极显著低于对照组(P<0.01),血清免疫球蛋白G (IgG)含量极显著高于对照组(P<0.01)。日粮中添加酵母培养物能够极显著提高超氧化物歧化酶(SOD)活性(P<0.01),显著提高奶牛机体的总抗氧化能力(T-AOC)(P<0.05)。研究表明,日粮中添加酿酒酵母培养物可提高奶牛机体的免疫力和抗氧化能力。 相似文献
9.
本试验研究了奶牛日粮中添加葛根粉对奶牛生产性能的影响。选用产奶量、体重相近的健康中国荷斯坦奶牛60头,随机分成3组,每组20头。3组日粮分别是：对照组日粮为基础日粮、试验Ⅰ组目粮为基础日粮＋葛根粉200g/（头·d）,试验Ⅱ组日粮为基础日粮＋葛根粉300g/（头·d）。结果表明,日粮添加葛根粉200g／（头·d）试验组产奶量和乳成分与对照组无显著差异（P〉0．05）;日粮添加葛根粉300g/（头·d）试验组产奶量、4％标准乳产奶量比对照组显著增加（P〈0．05）,乳脂产量、乳蛋白产量比对照组有提高的趋势,但差异不显著（P〉0．05）。 相似文献
10.
本试验旨在研究日粮中添加复合植物提取物对奶牛产奶量、乳成分、体细胞数及经济效益的影响。选择月龄(25～27月龄)、胎次(1胎)、泌乳天数相近且健康的泌乳高峰期荷斯坦牛230头,其中高产牛(日产奶量34.00±2.50kg)140头,中产牛(日产奶量27.01±2.38kg)90头。高产牛随机分为对照组和试验组,每组70头牛,对照组饲喂基础日粮,试验组饲喂基础日粮+1g/(头·d)复合植物提取物;中产牛随机分为对照组和试验组,每组45头牛,对照组饲喂基础日粮,试验组饲喂基础日粮+1g/(头·d)复合植物提取物,预试期3d,正试期30d。结果表明:(1)日粮添加复合植物提取物后,中产牛日产奶量提高1.95%(P>0.05),高产牛提高3.42%(P>0.05)。(2)复合植物提取物对中产牛、高产牛的乳脂率、乳蛋白率、脂蛋比、体细胞数及尿素氮含量均无显著影响(P>0.05)。(3)日粮添加复合植物提取物,中产牛经济效益增加1.56元/(头·d),高产牛增加3.66元/(头·d)。在本试验条件下,日粮添加1g/(头·d)复合植物提取物能够在一定程度上提高奶牛产奶量和经济效益,但对乳成分无显著影响。 相似文献
11.
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
13.
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
15.
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
16.
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
17.
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
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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