登陆广东省的初,终热带气旋分析及预测

本文分析了太平洋海温异常、ＥＮＳＯ与登陆广东省的初、终热带气旋的关系,并用海温建立了广东省初、终热带气旋的预报方程。     

丘间滩地糜子和玉米光合蒸腾特性与内外影响因子的关系

对种植在丘间滩地的糜子和玉米进行了光合、蒸腾及一系列内外影响因子的测定。结果表明:两种作物光合、蒸腾日进程曲线均呈单峰型;蒸腾速率达峰值的时间落后于光合速率达峰值的时间;光合速率主要受光合有效辐射和温度的影响;蒸腾速率主要受空气湿度和气孔导度的调控;光合、蒸腾受植物叶水势和胞间CO₂浓度的影响不大。两种作物光合与蒸腾特性、水分利用效率及内部调解机制的变化极为相似,只是在光合速率、水分利用效率和对高温的适应上,糜子略优于玉米。     

Geochemistry of early Palaeozoic amphibolites from the Orlica-Śnieżnik dome,Bohemian massif: petrogenesis and palaeotectonic aspects

Orthoamphibolites within and marginal to the Orlica-Śnieżnik dome in the eastern Bohemian massif are associated with a series of Proterozoic-Lower Palaeozoic supracrustal meta-sediments of the Stronie, Nové Město and Staré Město formations. Massive and variably foliated amphibolites range from common epidote-plagioclase-blue-green/green hornblende varieties to assemblages with diopside, garnet and brown amphibole. All the amphibolites have a basaltic composition and are divided into three main chemical groups which are intimately associated in the field: main series tholeiites, low-Ti tholeiites and alkali basalts. All groups exhibit a common enrichment in LIL elements+Nb+Ta (relative to high-field-strength elements) which reflects contamination by upper continental crust and/or pelagic sediment compositions. The gross chemistry of the tholeiitesapproaches that for MORB, although the geological environment and nature of crustal contamination suggests that the basaltic precursors were probably emplaced in a rifted ensialic basinal environment. If the amphibolites are representative of an early phase of the Lower Palaeozoic fragmentation of Gondwanaland, then rifting did not fully develop ocean crust. The wider significance of the chemical interpretation implies that some of the variation from Variscan Proterozoic-Palaeozoic metabasite suites that is ascribed to a complex of different eruptive settings could be accounted for by variable contamination and/or source composition.     

海水比重对海带幼苗生长发育的影响

本文提出不同比重海水对海带游孢子的放散、附着,胚孢子的萌发,配子体的生长发育和幼孢子体生长的影响 实验结果表明:(1)海带配子体的生长发育对比重的适应能力较强,在高比重和低比重的海水中虽然死亡率很高、生长发育缓慢,但总有一部分个体能生活下来。配子体对比重的适应范围是1.01010-1.03510;(2)海带的幼孢子体对比重的适应能力较小。其适应范围是1.02000-1.03510.尤其是低比重海水能引起泡烂。本实验结果对指导海带苗种生产有一定意义。     

Studies on the edwardsiellosis and characterization of pathogenic bacteria from diseased flounder (Paralichthys olivaceus L.) and turbot (Scophthalmus maximus L.)

1IntroductionEdwardsiellahas been recognized as a world-wide-occurring pathogen of numerous marine fishspecies,and edwardsiellosis has been recorded in adiverse array of fish species,including chinooksalmonOncorhynchus tshawytschaL.(Amandi etal.,1982),cha…     

Physiology of Laminaria

Abstract. Discs of lamina tissue excised from Laminaria digitata, L. hyperborea and L. saccharina were unaffected by cutting. They photosynthesized at a constant rate for several days and increased in area and weight during prolonged bubble cultures at a rate comparable with that of plants on the shore.     

普通栽培稻×小粒野稻F_1酯酶同工酶研究

用二倍体普通栽培稻和异源四倍体小粒野稻及其杂种一代（F1）进行酯酶同工酶测定和主要性状的田间表证。结果表明：普通栽培稻与小粒野生稻由于亲缘关系较远,其遗传基础差异很大,从而致使两者的酯酶同工酶谐相差也很大。两者杂交的F1,集中显示出双亲的所有酶带。F1的酶带是由于双亲互补的多个结构基因通过一系列调控机制而表达的结果。     

对T63L16所作月延伸预报准确率的评估

对国家气候中心１９９６年１－１２月和１９９７年１－８月用Ｔ６３Ｌ１６模式所做的５７次月延伸预报５００ｈＰａ高度场进行了检验评估,并对 系统性误差进行了分析和订正。同时对西北气候变化有较大影响的在循环流系统的环流特征量进行了检验,并给出了订正偏差。