共查询到20条相似文献,搜索用时 78 毫秒
1.
2.
应用代乳粉的犊牛早期断奶试验 总被引:1,自引:0,他引:1
在犊牛60d断奶试验中,试验组头平均体重、日增重比对照组分别增加5.3kg(P〈0.01)、88.5g(P〈0.01),同时比对照组节省鲜牛奶314kg。在莱西市推广应用效益十分显著。 相似文献
3.
广元市元坝区1993年开始从事牛品种改良工作.几年来,取得了显著的经济、社会及生态效益,区内牛群结构正逐渐由役用型向役肉兼用型发展,在大力开展牛改工作的同时,我区还致力于科技试验示范及攻关,特别是在犊牛早期断奶培育技术等方面取得了重大突破,形成了适应山区特点及同行参考的"一驱二早三足四定五勤六净"犊牛培育技术. 相似文献
4.
5.
6.
犊牛早期断奶效果观察 总被引:3,自引:0,他引:3
胡国良 《江西畜牧兽医杂志》2001,(1):8-8
试验表明:实行早期断奶,犊牛每头5个月饲养成本只需503.6元,每头犊牛可节省556.15元,而且随着月龄的增加,试验组的体重、体尺与对照组接近,差异不显著(P>0.05),早期断奶不影响犊牛的正常发育。 相似文献
8.
犊牛早期断奶技术已成为现代奶牛业的一项常规技术。本文主要介绍了犊牛早期补料的依据、意义、方法,早期断奶技术的关键措施,旨在为奶牛场及奶牛养殖户提供参考。 相似文献
9.
传统犊牛断奶时间一般定在6月龄,随着养殖技术的不断改革创新,在缩短犊牛断奶周期方面取得了一定的成果,促进了养殖效益的提高.本文主要介绍犊牛早期断奶的优点及相关技术,供参考. 相似文献
10.
早期断奶对犊牛的影响敖日格乐, 尔迪,王纯洁内蒙古农牧学院犊牛早期断奶是在乳用犊牛培育上采用的一项新技术。大量的研究和广泛的实践证明,犊牛早期断奶是一个行之有效的措施,它的特点之一是哺乳期短,哺乳量少,可节省大量鲜奶,减轻劳动强度,降低培育成本。另一?.. 相似文献
11.
早期断奶对猪生产性能的影响 总被引:1,自引:0,他引:1
通过综述早期断奶对仔猪的消化吸收和免疫抗病,对母猪的发情、受胎、产仔以及繁殖寿命的影响,提示在研究和应用早期断奶技术时,要充分遵循生物学规律,才能取得最大限度的经济效益。 相似文献
12.
Mycobacterium avium subspecies paratuberculosis (MAP) causes Johne’s disease, a chronic progressive enteritis. It is generally assumed that calves rarely shed MAP bacteria and that calf-to-calf transmission is of minor importance. The objectives were 1) to estimate the prevalence of MAP-shedding young stock in MAP-infected dairy herds, and identify predictors for test-positive young stock; and 2) to estimate proportions of MAP-contaminated young stock group housing pens and air spaces, and furthermore, identify predictors for test-positive pens. Fecal samples were collected from 2606 young stock on 18 MAP-infected dairy farms. Environmental fecal samples were collected from all group-housing pens and dust samples were collected from all barns. All individual samples were analysed using IS900 and F57 qPCR; fecal samples positive by either PCR and all environmental and dust samples were cultured. Overall, 8.1, 1.2 and 2.0% of cattle were positive on IS900 qPCR, F57 qPCR and bacterial culture, respectively. Young stock housed on farms with culture-positive environmental samples collected from adult cow housing and manure storage had higher odds of testing IS900 qPCR-positive than young stock housed on farms with only negative environmental samples. Furthermore, 14% of collected environmental samples, but no dust samples, were test-positive. Age of cattle in the pen was a significant predictor for environmental sample results. Young stock excreted MAP bacteria in their feces which provided strong evidence for calves as sources of within-herd transmission of MAP on dairy farms known to be infected with this organism.
Electronic supplementary material
The online version of this article (doi:10.1186/s13567-015-0192-1) contains supplementary material, which is available to authorized users. 相似文献13.
Effects of early weaning on postpartum reproduction of cows 总被引:1,自引:0,他引:1
14.
为了寻找泌乳奶牛脂肪肝早期诊断方法,本研究从某千头奶牛场随机选取了30头乳酮阳性的奶牛,其中临床酮病牛10头,亚临床酮病牛20头,测定其肝脂含量以及血中代谢指标和肝功指标。试验结果表明,脂肪肝的奶牛存在能量负平衡现象,机体呈现高游离脂肪酸血症、高酮血症,肝脂浸润越重,能量代谢障碍越严重;乳酮阳性出现时间的早晚与脂肪肝的严重程度密切相关,乳酮阳性产后出现的越早,乳酮阳性越明显,肝脂浸润越重;随肝脂浸润程度的加重,肝功多个指标会出现异常,重度的脂肪肝会引发肝功能不全。本试验证明,酮粉法可以作为早期诊断奶牛脂肪肝的初选方法,肝功指标异常可作为诊断脂肪肝的辅助方法,两者结合可作为奶牛脂肪肝的实用、有效和准确的早期诊断方法,准确率可达80%。 相似文献
15.
早期断奶对羔羊生长发育的影响 总被引:1,自引:0,他引:1
将120只10~15 日龄的德国美利奴羊(♂)×小尾寒羊(♀)杂交一代羔羊随机分为Ⅰ、Ⅱ、Ⅲ、Ⅳ组,Ⅰ组于35 日龄断奶、Ⅱ组于45日龄断奶、Ⅲ组于60 日龄断奶、Ⅳ组于90日龄断奶.结果表明:60 d体重4组间无显著差异(P>O.05);90 d体重,Ⅱ、Ⅲ、Ⅳ组极显著(P(0.01)高于Ⅰ组,Ⅱ、Ⅲ、Ⅳ组间差异不显著(P>O.05).30~60日龄日增重,Ⅱ、Ⅲ、Ⅳ组极显著高于Ⅰ组(PO.05).45日龄断奶,羔羊体质健壮,抗病能力较强,综合效益高,为最佳断奶时间. 相似文献
16.
Cengiz ATASOGLU Ismail Yaman YURTMAN Türker SAVAS Mustafa GÜLTEPE Ömer ÖZCAN 《Animal Science Journal》2008,79(4):435-442
This study aimed at investigating the effects of weaning kids abruptly at an average of 55 ± 13 days of age on intake, behavioral and serum parameters and, lasted for a total of six weeks; two weeks pre-weaning and four weeks post-weaning. Sixteen single kids with equal gender were used. Kids were only allowed to stay with their mothers for suckling (45 min/period) both in the morning and in the evening period during pre-weaning. Grower concentrate and hay were offered ad libitum . The duration of the study was divided into three periods for the sampling of behavioral and serum parameters; (i) pre-weaning period lasting for two weeks (P-BW) (ii) early post-weaning period lasting for one week (P-AW1) and (iii) late post-weaning period lasting for three weeks (P-AW2). Daily weight gain of kids gradually decreased as the observation period progressed ( P = 0.001). However concentrate feed intake increased from 0.154 kg/day in P-BW to 0.479 kg/day in P-AW1 and 0.499 kg/day in P-AW2. Water intake, rumination and standing behaviors decreased in P-AW2 ( P < 0.001), whereas activity towards concentrate feed (CF) ( P < 0.001) and roughage ( P = 0.012) increased as compared to P-BW and P-AW1. Abnormal oral activity was not affected by the periods ( P = 0.906). CF was significantly higher in females ( P = 0.003), whereas males displayed higher lying behavior ( P = 0.007). Glucose, total protein, urea, cholesterol, HDL-cholesterol, LDL-cholesterol concentrations ( P = 0.001) and ALP activity ( P = 0.003) were significantly affected by the periods. The results of the present study suggest that behavioral and serum parameters across the periods describe changes in the nutritional conditions as a result of the transition from milk to solid feed in association with weaning. 相似文献
17.
半乳甘露寡糖对早期断奶仔猪生长性能的影响 总被引:7,自引:0,他引:7
试验旨在研究日粮中添加不同比例的半乳甘露寡糖替代抗生素对早期断奶仔猪生长性能及腹泻的影响。试验选用体重 (8.4± 0 .2 7)kg(杜×长×大 ) 2 8d断奶仔猪 72头 ,随机分为 3个处理 ,每个处理 6个重复 ,每个重复 4头猪。三组处理日粮分别为 ,处理 1为基础日粮添加 0 .12 %的半乳甘露寡糖 ;处理 2为基础日粮添加 5 0mg/kg的金霉素 + 0 .0 8%的半乳甘露寡糖 ;处理 3为基础日粮添加 10 0mg/kg的金霉素。结果表明 :处理 1的平均日增重和平均日采食量最高 ,且处理 1和 2之间差异显著 (p <0 .0 5 ) ,处理 1的平均日增重比处理 2提高 17.5 5 % ,比处理 3提高 7.13% ;饲料转化率 3个处理间差异不显著。另外 ,试验期间 ,处理 2、3组各有一头猪轻微腹泻 ,注射青链霉素一天后好转 ,处理 1无腹泻发生。试验表明 ,半乳甘露寡糖可提高仔猪生长性能且有减少腹泻发生的趋势。 相似文献
18.
将69头肺炎奶犊牛分成3组,分别为24,25和20头,分别应用双莴连注射液。氨基苄青霉素和恩诺沙星进行治疗,治愈率分别为62.5%,,68.0%和90%,治愈时间分别为11.3±1.20,9.8±1.4和4.4±1.1d。治疗结果表明恩诺沙星组的治疗效果明显优于另外2组,该药可作为治疗犊牛肺炎的首选药物。 相似文献
19.
《饲料工业》2017,(9):48-54
为研究中国荷斯坦犊牛早期断奶不同哺育方案对断奶后2~6月龄生长发育与DMI的影响,选择品种来源一致、初生~2月龄(61日龄)阶段采用代乳料-犊牛料不同过渡时间哺育方案、实测平均体重(81.96±9.06)kg的健康中国荷斯坦公犊36头,按体重相近的原则随机分9组,以前期哺育方案、能量饲料构成,以及甘露寡糖、微生态制剂不同添加水平为试验因子,采用L9(34)正交试验设计,探索犊牛早期断奶代乳期代乳料-犊牛料不同过渡时间哺育方案对2~6月龄生长发育及DM采食能力的影响。结果显示,试验犊牛2~6月龄的生长强度依次为体重>胸围≈体斜长>管围>体高,以体重为最大,其次为胸围和体斜长;体重估测回归方程为:体重(kg)=胸围2(m)×体斜长(m)×84.06+13.48。对ADG的调控效果,2~4月龄以0.08%甘露寡糖最佳,"7+1"过渡与之相近,比设定水平可提高ADG 10.95%(P<0.05)以上;4~6月龄以"7+1"过渡为优,0.08%甘露寡糖与之相近,比设定水平可提高ADG 11.12%(P<0.05)以上。对DMI的调控效果,2~4、4~6月龄均以"7+1"过渡最优,比设定水平相对提高DMI 10.00%以上;0.08%甘露寡糖与之相似。以能量饲料构成的调控效果相对为小。结果表明,中国荷斯坦犊牛早期断奶代乳期采用7周代乳料+1周犊牛料过渡的前期哺育方案,断奶后犊牛料添加0.08%甘露寡糖、0.10%复合微生态制剂,犊牛料能量饲料构成采用普通玉米可显著提高ADG和增强青粗饲料采食能力。 相似文献
20.
2001年4月份,京郊奶牛场新生犊牛出现多发性关节炎。流行特点是:生后3d内发病多,病后3d内死亡多。临床症状是体温升高,腕、跗和冠关节肿大,剖检见关节周围肌肉充血,水肿,筋膜出血,关节液混浊,有纤维素块,关节面出血、溃烂。组织学变化特征是:肝细胞变性、坏死,核内有包涵体;脑神经细胞变性、坏死,血管水肿,周围浆细胞、淋巴细胞浸润形成“血管套”。用关节液与等量衣原体阳性血清混合,37℃中和1h后,卵黄囊接种6日龄SPF鸡胚2枚,每枚0.3mL,同时设病原对照、正常鸡胚对照各1枚,封腊后37℃孵育观察12d,结果关节液中和组鸡胚全存活,病原对照组死亡,表明关节液中存在的病原应为衣原体。犊牛所发生的关节肿大为衣原体所致的多发性关节炎。 相似文献