赤霉素反应敏感型和不敏感型谷子矮秆突变体的鉴定

采用赤霉素点滴法（苗期）浸渍法（芽期）以及喷洒法（拔节期）对３种谷子矮杆突变体的赤霉素反应敏感性进行了研究,结果表明矮宁黄和６２３Ｃ属赤霉素反应敏感型,它们苗期的叶片和叶鞘及拔节期的节间均可随外加赤霉素而显著伸长,达到正常株（苗）高,ＣＨ８４１１３则属于赤霉素反应不敏感型,多种赤霉素（ＧＡ１,ＧＡ３,ＧＡ７,ＧＡ９）处理均不能其株（苗）高恢复正常,用ＥＬＩＳＡＣ地３各矮秆突变体和正常品种伸长敏感期     

不同杂交技术对小麦×玉米产生单倍体的影响

首次在小麦与玉米杂交产生小麦单倍体方法中应用改良垂直穗轴剪颖剪药授粉技术和不去雄授粉技术,并与常规去雄授粉技术进行比较。其结果:平均胚产生频率常规去雄授粉技术为29.9％,改良垂直穗轴剪颖剪药授粉技术为21.4％,不去雄授粉技术为17.2％。3种杂交技术之间植株产生频率十分接近,分别是81.0％、81.8％和78.9％。尽管统计分析表明3种杂交技术间胚产生频率存在着显著差异,但是改良垂直剪颖剪药技术工序少,操作简便,速度快,工效高,应是首先推荐使用的技术。4个小麦品种的胚产生频率在18.5％～29.1％间(平均22.6％),存在着显著差异。植株产生频率在74.4％～87.2％之间,平均为80.6％。     

Current status and future strategy in breeding grasspea (Lathyrus sativus)

Efforts in grasspea (Lathyrus sativus) improvement have increased since the development of lines that are very low in the neurotoxin Beta-N-oxalyl-L-alpha-beta-diamino propionic acid (ODAP); also referred to as Beta-N oxalyl-amino-L-alanine (BOAA). Many programs now address several related aspects of improvement simultaneously. These include reduced ODAP concentrations, insect and disease resistance, nitrogen fixation, agronomic practices, fodder and forage production, and components for increased yielding ability. The coordinated, multidisciplinary approach now being applied to the genetic improvement of grasspea should allow the potential of this largely neglected grain legume to be fully realized.     

MEASURING PROBABILITY OF SKY BRIGHTNESS IN CLASSIFICATION BY THE AVERAGE INSOLATION

According to the daily change law from curves for percentage insolation,this paper presents a new formula of the average insolation in the zones where the insolation is more than 70%. By means of the hourly observing data during two years for solar direct ratiation, cloudage and sunshine condition in seven zones different lighting climate,considering the vaper pressure and the altitude present the function of percentage insolation and the probability of four sky brightness classification,this formula has a certain precision to be proved by observation.     

The Particle Properties of Panzhihua Vanadium-Bearing Titanomagnetite Concentrate

In order to investigate how to increase the concentrate sintering productivity,the particle properties of the concentrate have been studied. It was found that the essential reasons for low sintering productivity are the difficulties to pelletize and poor permeability because of particle' s size bigger,smooth surface, poor activity and hydrophobe.     

人参胚后熟期间核酸、蛋白质、糖的变化及激素的影响

人参种子需经形态后熟和生理后熟才能萌发。在整个胚后熟期间,每粒种子总核酸、RNA量逐渐增加,DNA含量逐渐下降、类脂、总糖,淀粉含量也逐渐下降,胚缓慢增长。经激素处理后、总核酸,RNA量在形态后熟阶段快速增加,胚率迅速增长。在生理后熟期,出现一个淀粉的含量高峰,随后出现一个还原性糖的含量高峰,因此,认为生理后熟的作用可能是为种子萌发积累能量。     

甘兰型油菜品质性状的变化与抗(耐)菌核病的关系

经1987～1992年时甘兰型油菜品质资源田间自然抗病性的连续观察鉴定(包括同一品种不同品质的单株)和同一品种不同发病级别单株种子内芥酸、硫甙、油份等品质的测试分析。结果是油菜菌核病的发病程度与这些品质性状的关系密切。即抗病性的强弱与芥酸、硫甙的含量成正相关,与油份的含量成反相关,不同发病级别的单株种子与产油量成反相关。根据分析结果笔者认为,在进行双低油菜育种过程中,应将低代材料置于易于发生菌核病的环境中选择,在发病极度严重时还要注重保留那些耐病的单株,这是集优质、丰产、耐病为一体的有效途径。同时在优质油菜生产中要作好防病工作。     

An Improved Method of the Transient Waveform Analysis in Power Systems

The angular frequency and decaying constant of each copmonect for the transient waveform in power systems were obtained by using the discrete Fourier transform; the amplitude and phase angle were calculated in the linear curve fitting method. And all of the parameters obtained above were treated in an unified optimization by using the curve fitting optimization of the least square method of general nonlinear funcrion so as to get the results of waveform analysis. Two examples are included.     

可浸种型水稻种衣剂的开发与应用研究Ⅱ几种水稻种衣剂的田间应用效果研究

本文对供试水稻种衣剂的田间应用效果进行了研究。结果表明，A－B2号种衣剂包衣水稻种子可提高种子的田间出苗率、成秧率，能增强秧苗素质；对水稻秧田期稻蓟马的防效最高，且持效期长；水稻产量也较清水对照区的提高了26．47％。