红掌缺素症状研究

对红掌亚利桑那品种进行了缺素症的研究，分别观察并分析了植株和叶片在缺乏某一种大量元素的情况下，表现出来的典型症状。     

原发性肾病综合征患者血、尿γ-干扰素的检测及其临床意义

目的：为进一步阐明γ—干扰素(IFN—γ)在原发性肾病综合征(PNS)发生发展中的作用及检测IFN—γ的临床诊断价值。方法：对32例PNS患者及10例正常人血清、尿液IFN—γ的水平进行检测，并结合PNS病理类型及其他临床指标进行分析。结果：系膜增生性肾炎(MesPGN)患者尿IFN—γ水平显著高于正常对照组，而非增生性肾炎组却与对照组差异无显著性；其次，尿IFN—γ水平与尿纤维蛋白(原)降解产物(FDP)浓度呈正相关；但与血肌酐(Ser)、血清肌酐清除率(Ccr)、24h尿蛋白定量(24hUPQ)无相关性。血清IFN—γ水平各组问差别无统计学意义。结论：IFN—γ参与增生型PNS免疫性肾损伤过程，并可能通过局部方式起作用，尿IFN—γ检测有可能作为区分增生性肾炎和非增生性肾炎的指标。     

Enzootic abortion in a goat herd, caused by mixed infection with Coxiella burnetii and Chlamydia psittaci. Case report]

We report on an outbreak of enzootic abortion in a herd of goats with high losses caused by mixed infection with Coxiella burnetii and Chlamydia psittaci. Both agents could be detected by microscopic investigation of smears from afterbirths by Giménez staining and by a capture enzyme-linked immunofluorescence assay (Capture ELIFA). Additionally, Coxiella burnetii was isolated from the same tissues in BGM cell cultures. Serological investigations with CF, indirect ELIFA, and IF tests revealed high antibody titers against both agents in most animals. Coxiella antigen was still detected 91 days later in milk samples of two infected goats by Capture ELIFA.     

论嫩江流域水源涵养林工程布局

从维护东北老工业基地的生态安全出发,立足东四盟实际,着眼于对整个东北地区危害最大,影响范围最大的生态现象列为今后一个时期三北工程建设的战略重点,通过大量调研分析和借鉴专家意见,经筛选整合,初步确定未来东四盟地区三北防护林工程建设的战略重点。     

沙区五种珍稀濒危植物水分生理指标测定及分析

本文在测定沙区５种珍稀濒危植物的水分生理指标的基础上，分析了其抗旱性，意在探讨适应干旱环境的特性。研究结果表明：矮沙冬青保水能力与吸水能力强，对干燥炎热的环境有很强的适应性；银沙槐蒸腾强度大，失水快，但吸水力强，补偿水分快；裸果木通过强的保水力适应干旱；绵刺以强的吸水力和抗脱水力适应环境；准噶尔无叶豆以体内水分自我调节作用适应大气干旱。     

提高本科微生物学教学效果初探

微生物是生物类专业中的重要课程.教学中应当将知识融入自然、融入社会,培养自然辩证法基本观点,开展创造性思维的培养,重视科学价值观的培养.在基础知识、基本能力教育培养的基础上,通过微生物学科教育的改革实践,在提高教学效果上有所作为.     

玉门市种业发展的现状与发展思路

在分析玉门市种子产业现状和存在问题的基础上,提出的种子产业发展思路是:深化改革,加速育繁销一体化;优化品种结构,开发新品种;搞好规划,加强基地建设;整合资源,拓展制种领域;落实种子法规,加强市场管理.     

河北省承德地区防护林体系林种结构的最佳模式

本文用线性规划方法,把以防护效益为主并满足社会需求作为约束条件,使防护林工程的费用最小作为目标,计算出了河北省承德地区防护林体系林种结构的61个方案。对不同情况,如资金不足、取得较好的经济效益、解决木材供需矛盾以及其它条件的变化等等,可以从61个方案中选出一个最佳方案。     

信息网络发展与农业信息咨询服务创新

本文针对信息网络迅速发展时期，农业科技信息机构信息咨询工作面临的挑战、有利条件和发展机遇，总结了农业信息机构在信息咨询工作中观念、机制、服务内容、方式和手段上的创新与实践。     

Effect of concentrate crude protein level on grass silage intake, milk yield and nutrient utilisation by dairy cows in early lactation.

Twenty-one multiparous dairy cows were fed concentrates containing three levels (119, 154 and 191 g/kg DM) of crude protein (CP) during the first ten weeks of lactation. Part of the grain and molassed sugar beat pulp was substituted with 0% (RSM0), 15% (RSM15) or 30% (RSM30) repeseed meal. Wilted grass silage was fed ad libitum after calving. The average response between RSM0 and RSM15 was +1.66 kg milk/d per percentage unit change in concentrate CP content. No further response occurred between RSM15 and RSM30. The positive effect of RSM inclusion was seen throughout the experimental period and was associated with increased plasma non esterified fatty acids (NEFA) and decreased plasma insulin concentration one week after calving, and higher efficiency of metabolisable energy utilisation for milk production. Digestibility of the diet remained unaffected. Milk and plasma urea tended to increase with RSM30 indicating excessive supply of rumen degradable protein. Because of the limited potential of cows to compensate for a deficit in feed protein supply by mobilising tissue protein, a substantial milk yield response can be achieved with a moderate level of protein supplementation during early lactation.