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<正>1奶牛酮病的现状近几年随着奶牛业的迅速发展,奶牛酮病的发病率也在不断升高,奶牛酮病是泌乳母牛产后几天至几周内发生的一种以血液酮体浓度增高为特征的营养代谢性疾病。奶牛酮病又称醋酮血病,是由于脂肪等代谢紊乱,大量酮体在体内蓄积,临床上以血液及尿内的酮体增多为特征的一种急性或慢性代谢疾病。病牛呈消化障碍和神 相似文献
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奶牛酮病是一种营养代谢病,其发病后会造成奶牛的消化功能以及神经功能紊乱,导致奶牛出现瘫痪甚至死亡。对奶牛酮病发生的原因、临床症状、鉴别诊断和治疗等方面进行剖析,可以为该病防治提供参考。 相似文献
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奶牛生产瘫痪和奶牛酮病的鉴别诊断及防治 总被引：1，自引：0，他引：1
奶牛生产瘫痪和奶牛酮病是奶牛,特别是高产奶牛的多发病。两种疾病,有相同点,也有不同点,临诊时两种病容易混淆。1两种病的相同点(1)都属于产科病;(2)都发生于高产奶牛,特别是3～6胎次的高产奶牛,低产奶牛极少发生;(3)都属于营养代谢病,因营养失衡引起;(4)都有瘫痪症状,卧地后不能自行起立;(5)都与遗传易感性有关。2两种病的不同点2.1发病原因不同生产瘫痪系因血钙降低所致,并兼有血磷血镁降低的原因;奶牛酮病系分娩前后血糖浓度突然急剧降低所致,也可能与大脑皮层缺氧有关的。2.2发病时段不同生产瘫痪在产犊后1～2d发病,最短的在产后数小时… 相似文献
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奶牛酮病的综合诊治 总被引：3，自引：0，他引：3
奶牛酮病,又称醋酮血病,是高产奶牛分娩后,由于大量泌乳,糖丢失过多,且能量和糖源供应不足,而导致血糖降低和血酮浓度增高的一种常见的急性或慢性病.笔者近年来收治40多例奶牛酮病,经治疗全部痊愈,现将诊治情况报道如下.
1 发病情况
据统计,该病主要发生在母牛产后20d之内,最迟不过7周,个别有在产后6个月内发病的.虽然发病原因比较复杂,但最主要的原因是营养供应不全,特别是在奶牛泌乳高峰期当饲喂大量精料高蛋白和高脂肪性饲料,而碳水化合物饲料青饲料、干草等供给不足,以及运动不足时,最易发病.冬春季节发病率较高,经产牛比初产牛发病率高,青年高产牛比其他牛发病率、死亡率较低. 相似文献
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Gerald L. Schroeder 《Aquaculture (Amsterdam, Netherlands)》1978,14(4):303-325
Intensely-manured ponds produce 15–30 kg fish ha?1 day?1 with cow or chicken manure and nitrogen- and phosphate-rich fertilizers as the only nutritional inputs. The manure as it is supplied to the ponds is not a good fish food and does not produce good fish growth. Quantitative analysis shows that the production of all organisms, autotrophic and heterotrophic, pelagic and benthic, large enough to be used directly by the fish (i.e., larger than 37 microns) is adequate to account for less than half of the measured fish growth. Production within the microbial community that flourishes on and rapidly digests the manure organic matter is adequate to produce the measured fish growth. The fish appear to harvest the microorganisms at the level of bacteria and protozoa, by ingesting the small straw-like particles which comprise much of the manure and serve as the substrate for the microbial growth. 相似文献
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介绍了灰色理论GM(1,1)预测方法,利用黑龙江垦区2002~2005年年末奶牛存栏数建立了垦区奶牛生产发展预测模型。模型精度为很好,用该模型进行预测,能反映出垦区奶牛生产的发展变化情况,并基于预测分析对垦区奶牛发展提出建议和对策。 相似文献
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Penueus monodon has become almost synonymous with aquaculture in Taiwan, indicating the level of commercial success it has attained over the past two decades. However, other species are being considered for future culture to diversify an industry overly dependent on one product, as well as to provide the market with an alternative commodity. This paper explores the feasibility of P. penicillatus as an alternative culture species in Taiwan.
P. penicillatus has seven merits that make it ideal for aquaculture: 1) P. penicillatus is comparatively resistant to low temperature. 2) It is a medium sized "white prawn" and is attractive to the consumer. 3) The migration behavior shows good possibilities for culture in sea water. 4) Wild spawners are abundant and natural, and induced spawning in captivity is relatively easy. 5) Larvae spontaneously spawned in captivity show good survival, existing on the natural food present in the pond. 6) It has a low protein requirement and has good growth in the early stages even at high stocking densities of 100–120 prawns/m2 . 7) P. penicillutus grows to a comparatively uniform size. This paper also discusses some difficulties in the culture of this prawn. 相似文献
P. penicillatus has seven merits that make it ideal for aquaculture: 1) P. penicillatus is comparatively resistant to low temperature. 2) It is a medium sized "white prawn" and is attractive to the consumer. 3) The migration behavior shows good possibilities for culture in sea water. 4) Wild spawners are abundant and natural, and induced spawning in captivity is relatively easy. 5) Larvae spontaneously spawned in captivity show good survival, existing on the natural food present in the pond. 6) It has a low protein requirement and has good growth in the early stages even at high stocking densities of 100–120 prawns/m
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Advanced fry of Indian carps and post-larvae of freshwater prawn were reared for 120?days in 18 small holding tanks using each treatment in triplicate as: (a) non-aerated and (b) aerated fresh human urine (0.01%), (c) cow manure (1.8?kg tank?1), mixed treatment with cow manure and human urine under (d) iso-phosphorus and (e) iso-nitrogenous conditions and (f) control. Examination of water quality, primary productivity of phytoplankton, plankton and fish growth from different treatments revealed that the total fish yield was maximum in the cow manure treatment (621.5?g?tank?1) followed by the mixed treatments under iso-nitrogenous (428?g?tank?1) and iso-phosphorus (333?g?tank?1) conditions. Fish yield in different treatments was the direct function of the gross and net primary productivity of phytoplankton which, in turn, were directly related to the concentrations of nitrate and phosphate levels of water as well as their ratios in different treatments employed. 相似文献
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Soengas J. L. Strong E. F. Fuentes J. Veira J. A. R. Andrés M. D. 《Fish physiology and biochemistry》1996,15(6):491-511
The capacity of carbohydrate and ketone bodies metabolism in brain and liver was evaluated in fed and food-deprived Atlantic salmon (Salmo salar) in a time period covering from 1 to 7 days (Experiment I), and in Atlantic salmon food deprived for 6 weeks, and food deprived for 4 weeks and refed for 2 weeks (Experiment II). The results obtained demonstrate for the first time in a teleost the existence of changes in brain metabolism due to food deprivation. Thus, decreased glucose levels in plasma are reflected in the brain by an increased mobilization of glycogen reserves, and by a decreased glycolytic capacity. Also, ketone bodies appear to increase their importance as a metabolic fuel from day 7 of food deprivation onwards. A possible increase in the gluconeogenic potential in brain simultaneously is not discarded. All these metabolic changes are reversed under refeeding conditions. 相似文献
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P V Miettinen 《Tier?rztliche Praxis》1992,20(2):149-152
The effect of two different feeding regimes on energy metabolism and fertility was studied in dairy cows. The cows were divided according to the type of feed into a hay-urea and a silage group. Ketone body levels in blood were used as indicators of energy balance. Intake of dry matter and of energy was lower in the silage group than in the hay-urea group. The energy balance had almost equilibrated in the hay-urea group at 50 days p.p., in contrast to that of the silage group. The ketone body levels were lower in the hay-urea group than in the silage group in early lactation. The cows in the hay-urea group had a shorter interval from calving to first insemination and to conception than those in the silage group. Low energy level in the late puerperal period had an adverse effect on fertility. The higher the level of ketone bodies at day 50 p.p., the lower the fertility of the cows is likely to be. 相似文献
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猪血超氧化物歧化酶(SOD)性质的研究 总被引：2，自引：0，他引：2
本文对猪血红细胞精制SOD的理化性质进行了研究。研究结果表明精制猪血SOD分子量为31697.86,亚基分子量15848.9,SDS-PAGE为1个条带。DAGE电泳为4个条带。FPLC法测定SOD为单一的吸收峰,达均一纯度。人源、牛源、猪源SOD氨基酸序列比较,猪源与人源的SOD在一级结构中有27个氨基酸不同,占总数的17.6%;牛源与人源的SOD在一级结构中有28个氨基酸不同,占总数的18.3%;仅从SOD氨基酸排列的序列上看,猪源SOD较牛源SOD更接近人源SOD。 相似文献
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Gill‐associated virus (GAV) was found to be associated with decreased prawn, Penaeus monodon, production when prawns from three farms (n = 45 ponds, 1800 prawns) were monitored for GAV over the production season using a graded RT‐nPCR. The grading system used was a visualization of either the outer or inner nested PCR products. Prevalence and loading of GAV were associated with disease severity. Ponds with a higher initial prevalence and a larger increase in GAV load over the production period suffered disease outbreaks. Ponds with low initial prevalence of GAV but a larger increase in prevalence and large increase in load over the production period suffered chronic disease with no disease outbreak identified, yet low production. However, the ponds with moderate to low initial prevalence of GAV with a low increase in prevalence and load of GAV over the production period incurred no disease outbreak and comparatively high production. Ponds with GAV prevalence greater than 75% at 1 month post‐stocking should be considered for termination as they have a high probability (95%) of having a disease outbreak. Emergency harvest when a disease outbreak occurs will significantly limit mortality losses. 相似文献
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In this case report a perforation of the uterus in a German Black Pied cow after correction of the uterine torsion in the 5th month of gestation is described. Because of the hopeless prognosis, the cow was slaughtered. An additional finding was a metaplastic keratinization of the chorionic epithelium in the form of a plaque. The reason and pathogenic meaning of this metaplasia is not known. In the discussion, therapy of the uterine torsion in such an early state of gestation is critically considered. 相似文献