共查询到17条相似文献，搜索用时 593 毫秒
1.
选择遗传标记性状降低奶牛隐性乳房炎发生率的设想 总被引：2，自引：0，他引：2
设想通过后裔测定选择较低体细胞数(SCC)估计育种值的公牛，以降低奶牛隐性乳房炎的发生率；对公牛进行包括生产性能、体型、SCC等各个方面的综合、全面的评价；考虑平衡地、较充分地发挥公牛降低隐性乳房炎发生率的遗传改良作用。 相似文献
2.
在全群奶牛进行乳房炎和酮病检验之后,选择16例健康牛和12例隐性乳房炎牛,进行牛毛微量元素的测定。结果健康奶牛牛毛Fe、Cu、Zn、Ca、Pb、As和Se的含量分别是76.52±24.22,9.15±1.90,162.22±55.16,1563.4±520.7,0.986±1.349,0.284±0.236和0.296±0.116ug/g;而患牛分别为59.35±23.94,6.50±3.40,96.83±19.21,747.1±674.1,1.260±1.248,0.425±0.216,和0.326±0.092ug/g。发现隐性乳房炎牛毛中Zn、Ca和Cu的含量显著低于健康牛;而毛中Fe、Pb、As和Se的含量元显著差异。初步认为隐性乳房炎与牛毛中Zn、Ca和Cu的缺乏有关。 相似文献
3.
中草药对奶牛隐性乳房炎的治疗效果观察 总被引：2，自引：0，他引：2
选择皖南地区某奶牛场106头奶牛进行乳房炎流行病学调查。应用SMT诊断液对奶牛奶样进行检测，发现59头奶牛具有隐性乳房炎，其发病率达55．66％。应用中草药组方研制的中药超细散剂“消炎增乳散”对奶牛隐性乳房炎进行治疗。消炎增乳散混入饲料中喂服，每天200g，3天为一个疗程。对照组不使用药物预防和治疗。结果表明中药制剂“消炎增乳散”对奶牛隐性乳房炎的治疗愈为72．2％。 相似文献
4.
中草药对奶牛隐性乳房炎的治疗效果观察 总被引：2，自引：0，他引：2
选择皖南地区某奶牛场106头奶牛进行乳房炎流行病学调查.应用SMT诊断液对奶牛奶样进行检测,发现59头奶牛具有隐性乳房炎,其发病率达55.66%.应用中草药组方研制的中药超细散剂"消炎增乳散"对奶牛隐性乳房炎进行治疗.消炎增乳散混入饲料中喂服,每天200g,3天为一个疗程.对照组不使用药物预防和治疗.结果表明中药制剂"消炎增乳散"对奶牛隐性乳房炎的治疗愈为72.2%. 相似文献
5.
目的探讨急性乳房炎的早期干预及护理要点。方法随机选择在我院建卡分娩的产妇80例,对其进行早期干预和护理。结果75例产妇未发生乳房炎,1周后出院;5例急性乳房炎早期患者经过精心护理恢复健康,未发现并发症和后遗症。结论通过急性乳房炎的早期干预及护理,可有效阻止乳腺炎的发生和进一步发展,提高护理质量。 相似文献
6.
7.
壳聚糖对乳房炎奶牛血清胆固醇、尿酸和肌酐的影响 总被引：4，自引：0，他引：4
为确定壳聚糖对奶牛乳房炎的治疗效果,选择产奶量、胎次和泌乳期相近,营养中等,乳房炎阴性奶牛6头,阳性30头,组成0(阴性对照组)、1(阳性对照组)和2、3、4、5组(试验组),每组6头.各组基础日粮和饲养管理相同.分别在基础日粮中添加壳聚糖0g、0g、10g、20g、40g和80g/d/头.连续喂养2周,分别与试验的0d、7d、14d采取血样,分离血清,测定血清中胆固醇、尿酸和肌酐的含量.结果:应用壳聚糖7～14d后,2、3、4、5组奶牛血清胆固醇含量均数有随壳聚糖用量的增加而降低的趋势,但差异不显著(P﹥0.05);血清尿酸和肌酐水平显著(P﹤0.05)或极显著(P﹤0.01)地降低.结论:壳聚糖具有加快乳房炎患牛机体对尿酸和肌酐排泄的功能,提高机体对炎症的抵抗力,促进机体的康复过程. 相似文献
8.
10种中药对奶牛乳房炎病原菌的体外抑菌试验 总被引：2，自引：0，他引：2
测定了黄芩、黄柏、黄连、大黄、金银花、秦皮、板蓝根、丹参、诃子、石榴皮对6种奶牛乳房炎病原菌的体外抑茵效果和最低抑菌浓度。结果表明,黄芩、黄柏、黄连、丹参、石榴皮对6种奶牛乳房炎病原菌均有明显的抑菌作用,其余的则差异较大；对绵阳市奶牛乳房炎的防治,首选中药为黄连,同时可选用大黄、诃子、石榴皮、黄芩、金银花组方。 相似文献
9.
奶牛急性乳房炎病原的分离与鉴定 总被引：1，自引：0，他引：1
安徽某奶牛场奶牛发生了一起急性乳房炎,选择其中两头病牛乳汁样品,分别对其病原进行分离与鉴定.经细菌学检验表明,该场奶牛的急性乳房炎是由不溶血性金黄色葡萄球菌、溶血性革兰氏阳性停乳链球菌和不溶和不溶血性革兰氏阴性的大肠杆菌共同引起. 相似文献
10.
安徽某奶牛场奶牛发生了一起急性乳房炎，选择其中两头病牛乳汁样品，分别对其病原进行分离与鉴定。经细菌学检验表明，该场奶牛的急性乳房炎是由不溶血性金黄色葡萄球菌、溶血性革兰氏阳性停乳链球菌和不溶和不溶血性革兰氏阴性的大肠杆菌共同引起。 相似文献
11.
E. J. Dillon T. Hennessy J. Cullinan 《The Journal of Agricultural Education and Extension》2016,22(3):255-270
Purpose: To examine the role of agricultural education and extension in influencing the adoption of best practice with regard to herd-level mastitis management.Design/Methodology/Approach: Somatic cell count (SCC) is an indicator of herd health with regard to mastitis and is negatively related to productivity and profitability. Panel data regression methods are utilised here to quantify the role of agricultural education and extension in reducing cell count and in influencing farmer best practice with regard to herd health. The impact of education and extension on farmer uptake of milk recording is of particular interest. Data utilised is farm-level Farm Accountancy Data Network (FADN) data for Ireland over a five-year period (2008–2012).Findings: Farmer uptake of formal agricultural training and liaison with agricultural extension services are shown to significantly improve mastitis herd health. Collectively, education, extension and milk recording results in an overall SCC reduction of 25% for the average herd. Farmers who undertook agricultural training were ten times more likely to monitor milk quality through milk recording compared to those who had not. Additionally, those farmers in contact with an extension service and also participated in a dairy discussion group were seven times more likely to practice milk recording.Practical Implications: The importance of farmer behaviour in the optimum management of herd health has been validated, as has the role of agricultural education and extension in influencing the uptake of best practice by farmers.Originality/Value: To date little research has been conducted using nationally representative herd-level data on the role of agricultural education and extension in improving animal health best practice. 相似文献
12.
This paper presents a quick, easy to implement and versatile way of using stochastic simulations to investigate the power and design of using single nucleotide polymorphism (SNP) arrays for genome-wide association studies in farm animals. It illustrates the methodology by discussing a small example where 6 experimental designs are considered to analyse the same resource consisting of 6006 animals with pedigree and phenotypic records: (1) genotyping the 30 most widely used sires in the population and all of their progeny (515 animals in total), (2) genotyping the 100 most widely used sires in the population and all of their progeny (1102 animals in total), genotyping respectively (3) 515 and (4) 1102 animals selected randomly or genotyping respectively (5) 515 and (6) 1102 animals from the tails of the phenotypic distribution. Given the resource at hand, designs where the extreme animals are genotyped perform the best, followed by designs selecting animals at random. Designs where sires and their progeny are genotyped perform the worst, as even genotyping the 100 most widely used sires and their progeny is not as powerful of genotyping 515 extreme animals. 相似文献
13.
This paper presents a quick, easy to implement and versatile way of using stochastic simulations to investigate the power and design of using single nucleotide polymorphism (SNP) arrays for genome-wide association studies in farm animals. It illustrates the methodology by discussing a small example where 6 experimental designs are considered to analyse the same resource consisting of 6006 animals with pedigree and phenotypic records: (1) genotyping the 30 most widely used sires in the population and all of their progeny (515 animals in total), (2) genotyping the 100 most widely used sires in the population and all of their progeny (1 102 animals in total), genotyping respectively (3) 515 and (4) 1 102 animals selected randomly or genotyping respectively (5) 515 and (6) 1 102 animals from the tails of the phenotypic distribution. Given the resource at hand, designs where the extreme animals are genotyped perform the best, followed by designs selecting animals at random. Designs where sires and their progeny are genotyped perform the worst, as even genotyping the 100 most widely used sires and their progeny is not as powerful of genotyping 515 extreme animals. 相似文献
14.
In the structures where long-term behavior should be monitored and controlled, creep and shrinkage effects have to be included precisely in the analysis and design procedures. Shrinkage varies with the constituent and mixture proportions, and depends on the curing conditions and the work environment as well. Self-compacting concrete (SCC) contains combinations of various components, such as aggregate, cement, superplasticizer, water-reducing agent and other ingredients which affect the properties of the SCC including shrinkage. Hence, the realistic prediction shrinkage strains of SCC are an important requirement of the design process for this type of concrete structures. This study reviews the accuracy of the conventional concrete (CC) shrinkage prediction models proposed by the international codes of practice, including CEB-FIP (1990), ACI 209R (1997), Eurocode 2 (2001), JSCE (2002), AASHTO (2004; 2007) and AS 3600 (2009). Also, SCC shrinkage prediction models proposed by Poppe and De Schutter (2005), Larson (2007), Cordoba (2007) and Khayat and Long (2010) are reviewed. Further, a new shrinkage prediction model based on the comprehensive analysis on both of the available models, i.e., the CC and the SCC is proposed. The predicted shrinkage strains are compared with the actual measured shrinkage strains in 165 mixtures of SCC and 21 mixtures of CC. 相似文献
15.
Science communication competence (SCC) is an important educational goal in the school science curricula of several countries. However, there is a lack of research about the structure and the assessment of SCC. This paper specifies the theoretical framework of SCC by a competence model. We developed a qualitative assessment method for SCC that is based on an expert–novice dialog: an older student (explainer, expert) explains a physics phenomenon to a younger peer (addressee, novice) in a controlled test setting. The explanations are video-recorded and analysed by qualitative content analysis. The method was applied in a study with 46 secondary school students as explainers. Our aims were (a) to evaluate whether our model covers the relevant features of SCC, (b) to validate the assessment method and (c) to find characteristics of addressee-adequate explanations. A performance index was calculated to quantify the explainers’ levels of competence on an ordinal scale. We present qualitative and quantitative evidence that the index is adequate for assessment purposes. It correlates with results from a written SCC test and a perspective taking test (convergent validity). Addressee-adequate explanations can be characterized by use of graphical representations and deliberate switches between scientific and everyday language. 相似文献
16.
余萍 《岳阳职业技术学院学报》2010,25(1):71-72
糖原累积病Ⅰ型为常染色体隐性遗传病,多发生于婴幼儿和青少年。本病系先天性肝、肾等组织中缺乏葡萄糖-6-磷酸酶所致。细胞核内糖原累积、肝脂肪变性明显但无纤维化改变是本型突出的病理变化。本病诊断分型的主要依据是肝穿刺新鲜组织酶活性检测。 相似文献
17.
网络游戏——隐性广告的下一个植入点 总被引：1，自引：0，他引：1
冯浩羽 《福建师范大学学报(哲学社会科学版)》2009,(2)
近年来,影视里的隐性广告表达越来越完善,在互动为主要特色的web2.0时代,人们在娱乐时间的分配上网络已成主角,隐性广告也悄然走进了网络游戏中.本文阐述了隐性广告走进网络游戏的必然性及其优势,同时也分析了在游戏中如何植入隐性广告的问题,最后总结了国内游戏植入式广告目前存在的问题及其发展趋势. 相似文献