执业兽医资格考试背景下的兽医病理学教学改革

为适应国家对兽医学专业人才执业化的发展需求,以及提高在校生获得执业兽医资格的比例,本文以执业兽医资格考试背景下的兽医病理学教学改革为主题展开论述,分析了执业兽医资格考试背景下兽医病理学教学存在的一些问题,提出了一系列执业兽医资格考试背景下针对兽医病理学教学问题的改革举措,以期能为学生能够更顺利的通过执业兽医资格考试以及更好的掌握动物病理学知识提供依据和参考。     

基于井下变电所的无人值守系统方案分析

随着煤矿中综合自动化技术的提高及普及,无人值守的自动化控制系统已经逐渐成为一种趋势.然而在这种自动化功能强大、环保高效的背后,安全问题也不容忽视.本着安全第一的原则,以稳定可靠、经济可行为指导思想,结合现场实践经验,提出一种针对无人值守自动控制变电所的方案.变电所无人值守综合自动化控制系统已经在平禹煤电有限责任公司一矿...     

亚洲象长鼻神经损伤治疗与体会

济南动物园亚洲象"亚昆"由于鼻部猛烈撞击硬物,致使远端鼻管神经及软组织损伤并肌肉萎缩,经过长时间合理用药,现已治愈。关于亚洲象鼻部神经损伤并肌肉萎缩在国内鲜有报导,在此愿与同行交流.具体情况报告如下:     

气候变暖对西藏青稞农田氨挥发和产量的影响

【目的】研究气候变暖对西藏青稞农田氨挥发特性和青稞产量的影响,为探索减少青稞生产中的氨挥发、提高氮肥利用率提供依据。【方法】在西藏青稞主产区之一的拉萨河谷农区,采用开顶式气室(open-top chamber, OTC)增温系统模拟气候变暖进行大田试验。试验共设置不增温(对照,T0)、增温2℃(T2)和增温4℃(T4)3个处理。将290.25 kg/hm²尿素(纯N 133.5 kg/hm²)分别于播种前(4月12日)基施60%、拔节期(6月6日)和抽穗期(6月20日)各追施20%。测定不同处理青稞农田的土壤氨挥发通量以及青稞生长指标、产量及其构成要素,计算基肥和追肥的氨挥发积累量和氨挥发损失率,分析增温与土壤氨挥发特性以及青稞株高、产量及其构成要素的相关性。【结果】氮肥基施后,T0、T2和T4 3个处理的青稞农田土壤氨挥发通量至播种后第14天达到峰值,且土壤氨挥发通量峰值由大到小表现为T4>T0>T2;T2和T4处理基肥氨挥发周期均为26 d,较T0处理延长了3 d。于抽穗期追施氮肥后,T0、T2和T4 3个处理的土壤氨挥发通量...     

小猪为啥长不快?

有的农户反映,家里养的小猪就是长不快,到底是啥原因呢?分析起来,主要有以下几个原因. 1.断奶不合理.农户养猪多采取一次断奶法,断奶后立即上市,使仔猪原来以母体为中心、同胞间共居、稳定舒适的生活条件突然发生了改变,一时难以适应而影响增重.应当在断奶前5～6天内,逐渐减少仔猪哺乳次数,直至完全断奶.     

不同光照处理下外施营养液和激素对万圣节法师叶色变化的影响[1]

To study the effects of light, external nutrition, and hormones on the color changes of Aeonium aeonium "Halloween" leaves. In this study, the 1-year-old stem cuttings of the Aeonium aeonium "Halloween" were used as materials. The leaves were sprayed with 25mg/L methyl jasmonic acid, 3‰ potassium dihydrogen phosphate, and 1‰ calcium magnesium boron mixture for two consecutive times, with an interval of 3 days. The experiment consisted of CK (water control), LS, DS (dark culture for 1 week). After 1 week of treatment, the leaf color parameters and anthocyanin pigment content were measured every 7 days for 6 consecutive weeks. The results showed that the treatment time and method had a significant impact on the leaf color parameters. In terms of brightness value L, as the treatment time extended, all three treatments showed an upward downward upward trend. Among them, the highest value was reached after 2 weeks of treatment, gradually decreased after 3 weeks, and sharply increased again after 6 weeks; In terms of red green saturation a value, after 2-4 weeks of treatment, both LS and DS treatments were significantly higher than CK, and the effect significantly decreased after 5 weeks; Light has a significant impact on a value, with DS treatment showing a significant decrease in a value after one week of shading, and a sharp increase after re lighting; In terms of the b value of yellow and blue saturation, the change in CK value is relatively small with the extension of treatment time, while the fluctuation in LS and DS treatment is significant; In terms of color saturation c value, DS treatment significantly increased with the prolongation of treatment time, and there was no significant change in LS and CK treatment within 1-3 weeks. After 3 weeks of treatment, there was no significant difference between the three treatments; With the extension of treatment time, the anthocyanin content of each treatment showed a trend of first increasing and then decreasing. After 2-3 weeks of treatment, the anthocyanin content was higher, and gradually decreased after 4 weeks of treatment; Correlation analysis shows that anthocyanin content is highly significantly positively correlated with a and c values, and anthocyanin content is a key factor in the red color of Aeonium aeonium "Halloween".     

果树苗木栽植技术新观点

我们通过多年实践,在果树苗木的栽植等具体技术方面有点新经验,特撰文与农友分享。1.栽植时间秋、春是果树苗木定植的两大季节,有说春栽好,有说秋栽好。     

分析常见牛疾病诊断与治疗措施

在我国经济的发展与变化中,养殖行业规模越来越大,且人们对牛肉产品的需求逐步增加。牛养殖的实践上,若没能及时对牛疾病进行诊断和治疗,很有可能阻碍牛养殖进程,无法保障养殖户的综合效益。本文主要以常见牛疾病诊断与治疗措施为重点进行阐述,首先分析牛疾病诊断要点与治疗的难点,其次从结核病的诊治、牛肺疫的诊治、牛流行热的诊治、传染性眼病的诊治、病毒性腹泻的诊治几个方面深入说明并探讨常见牛疾病的防控措施,全面促进牛疾病的诊断和治疗工作开展,推动养殖行业的建设,目的是给相关研究提供参考。     

鳕鱼皮源医用复合止血敷料的制备及性能研究

以太平洋鳕(Gadus macrocephalus)鱼皮明胶为原料,通过复配海藻酸钠得到一种可吸收复合止血敷料,并对其机械性能、止血效果、止血机理和生物相容性进行评价。结果表明,明胶质量浓度为10 mg·mL^-1时制备的止血敷料具有较高的机械强度。体内止血评价结果显示,复合止血敷料对大鼠股动脉止血、肝创面止血和断尾止血模型均有良好的效果,止血时间分别为(64±9)、(108±4)和(230±25) s,与市售明胶海绵的止血效果相当。复合止血敷料可缩短活化部分凝血活酶时间(Activated partial thromboplastin time, APTT)和凝血酶时间(Thrombin time, TT),激活内源性凝血系统和共同性凝血途径,以及促进血栓烷素B₂ (TXB₂)、血小板第四因子(PF4)和P-选择素的释放,达到快速止血效果。生物相容性实验结果证实,该复合敷料无急性毒性、无刺激性且溶血率小于5%,达到医用材料的行业标准。该研究结果为开发新型医用敷料并实现鳕鱼皮高值化利用提供了参考和理论依据。     

超高量有机肥施用对黄土高原旱作有机田首年玉米生长和产量的影响

为解决黄土高原有机旱作农田水分短缺、土壤贫瘠、作物产量低、施肥费工费时问题,在山西大宁县昕水镇开展本试验,即将牛粪经常规堆沤和蚯蚓堆制后,分别按照90、135、270 t/hm2施入黄土高原塬面旱作有机玉米田,研究最高有机肥施用量对玉米生长和产量的影响.结果表明,施入常规堆沤和蚯蚓-牛粪堆肥,首年即增加玉米籽粒产量和干...