羊支原体性肺炎两标准株对抗菌药物敏感性的研究

本实验测定了环丙沙星、氧氟沙星、单诺沙星、红霉素、罗红霉素、泰勒菌素、泰妙菌素、四环素等8种药物对羊肺炎支原体两个标准株Y98和Y-goat的体外抑菌浓度以及红霉素与氧氟沙星、泰勒菌素对Y-goat和四环素与氧氟沙星、泰勒菌素对Y98的联合药敏作用。对羊肺炎支原体两个标准株对抗菌药物的敏感性进行了分析。     

芫花萜药膜中止早,中孕412例效果分析

芫花萜膜终止早中孕４１２例临床观察的结果表明，对孕１２～１６周的流产成功率为９０．８％，给药至排胎平均时间为２３．４６±１０．３２小时，产时、产后失血平均分别为７１．８７±３３．５６ｍｌ和４５．１７±２０．５８ｍｌ。整个流产过程宫缩缓和，极少强直性宫缩，节律良好，痛苦少，类似正常分娩过程，可作为终止１２～１６周妊娠可供选择的一种有效方法。     

低、无毒农药防治花灌木主要刺吸式口器害虫

在查清天津市园林主要花灌木刺吸口器害虫桃粉蚜、绣线菊蚜、棉蚜和山楂红蜘蛛发生消长规律的基础上 ,确定了防治适期和结合点 ,筛选出 10 %吡虫啉、绿灵、蚧螨灵、 1. 8%齐螨素和花保5种低、无毒药剂 ,防效均达到 90 %以上。查出天敌 13种 ,并对优势种作了取食量调查     

不同种植方式对甜菜产质量的影响

试验结果表明,在同等条件下,由于栽培方式不同,密度不同,块根产量、产糖量差异较大,以纸筒大垄双行为最好,甜菜块根产量、产糖量比对照小垄直播分别提高36.7%、39.8%,每公顷纯增效益1602元。其次是大垄双行覆膜,块根产量、产糖量比对照小垄直播分别提高31.5%、33.1%。     

论科技情报的信息媒介意义

科技情报作为一种重要的信息媒介。作者着重地阐述了其具备的宏观俯瞰,微观入里的导引功能。就其科技情报意义与林业科研及生产领域上的信息交流而言提出了自己的见解。     

阔叶树种的研究现状与江西研究的发展方向

通过对阔叶树种在我国及江西省的研究状况的论述，初步总结了阔叶树种的研究水平及研究方向，指出了江西省阔叶树种研究存在的问题，探讨了江西省今后阔叶树种研究的方向。     

菜用加工兼用栗永荆3号选育

一般认为我国南方栗仅宜于菜用，加工极易开瓣和糊化，经过几年的筛选和加工试剂，永荆3号品种可生产B－E级标准的糖水栗子罐头。     

配料混合试验的设计和分析

系统地介绍了配料混合试验的基本概念．指出了混合试验与常规因子试验的区别。提出配料混合试验的3种设计，即顶点和边界点设计、矩心设计和极顶设计。以2个实例演示了混合试验资料的统计方法，包括回归和方差分析．驻点分析和等值线分析。     

Effects of Benzyl Adenine and Abscisic Acid on Grain Yield and Yield Components in Triticale and Wheat

Grain yield and yield components (grains per ear, grain weight, 1000-grain weight, ear weight, ear seed ratio and dry matter partitioning between ear and seed) were examined in a wheat genotype (PBW-343) with well-filled grains and a Triticale genotype (DT-46) with poorly filled grains (showing grain shrivelling) grown in pots. Six days after anthesis (DAA), benzyladenine (BA) @2 µg ear⁻¹ and abscisic acid (ABA) @4 µg ear⁻¹ were injected at the base of the mother shoot ear in both species. It was observed that, in both wheat and Triticale , BA increased the grain weight, grain number and partitioning of dry matter between ear and seed, whereas ABA decreased the grain weight, grain number and dry matter partitioning between ear and seed. However, these decreases were slower in Triticale than in wheat. BA treatment increased the grain dry matter accumulation, which in turn resulted in better filling of grains and increased the grain weight in both wheat and Triticale . The average grain weight of Triticale was lower than that of wheat. Thus, it appears that variation in grain weight between wheat and Triticale might be due to different availabilities of growth-promoting phytohormones such as cytokinins and assimilates.     

Studies on Tomato Seedling Quality Indices Under Simulated Shipping and Storage Conditions

Indices of the tomato seedling quality maintenance level after production before field planting were studied through simulated experiments, small--scale operation, indoor analyses and measurements, and field observation. The results showed that under simulated shipping and storage conditions, seedling quality change following different durations (days) of shipping and storage was correlated significantly or even very significantly with certain physiological and morphological indices. With various measured indices following different periods of shipping and storage treatment subjected to multinomial successive regressive correlation analysis, the principal factors influencing seedling quality maintenance level are identified to be chlorophyll content→dry short weight→ leaf freshness index in order of their importance. Significance analysis with multinomial fitted equation indicated that correlations between any one of above three factors and the growth index after field planting reached very significant difference level.