微生物营养剂对峨眉蔷薇种子萌发的影响

以峨眉蔷薇种子为材料,低温冷藏后取出,利用不同质量浓度的微生物营养剂进行暖温催芽处理,以零添加、零处理为对照,研究探讨了不同碳、氮质量浓度的微生物营养剂对种子萌发的影响,结果显示,不同质量浓度的营养剂均可不同程度地提高种子萌发率,促进种子快速萌发;较适宜营养剂,即蔗糖、酵母膏质量浓度分别为5、1.0g· L-1;质量浓度最高的组合效果最差,较低的碳源、氮源质量浓度组合表现出较好的综合促进作用,推测可能与微生物的活动周期有关,最适的营养剂质量浓度等仍有待进一步研究.     

Comparison of physiological and yield traits between purple- and white-pericarp rice using SLs

Five physiological and eleven yield traits of two pairs of sister lines generated from a high generation with similar genetic background (SLs) for purple pericarp were investigated to explore the reasons behind low-yield production of colored rice. Of the five physiological traits examined, except grain anthocyanin content, there were generally similar trends between the P (purple-pericarp) lines and the corresponding W (white-pericarp) lines over two seasons (in the year 2009 and 2010 separately). The results demonstrated that the chlorophyll content of flag leaves, the net photosynthetic rate of flag leaves, and the grain anthocyanin content could be easily influenced by the environment. The physiological functions of the traits for the P lines were more active than those of the corresponding W lines in the year 2010. The grain anthocyanin content of the P lines was much greater in the year 2010 than in the year 2009 during the growth period. The investigation of yield traits revealed that the P lines had reduced 1000-grain weight, yield per plot and grain/brown rice thickness compared to the W lines. A difference comparison of these traits and a source-sink and transportation relationship analysis for these SLs suggested that small sink size was a key reason behind yield reduction of purple pericarp rice.     

The Innovativeness and Heterogeneity of Foreign‐Invested High‐Tech Companies in Shanghai

China has taken a foreign direct investment‐based approach toward increasing its capital and knowledge base, and developing into an innovative economy. However, little quantitative evidence exists about the factors that drive innovations of foreign‐invested enterprises (FIEs) there. This paper uses survey data from high‐technology firms in Shanghai to discuss factors affecting their innovativeness. It takes the concepts of absorptive capacity, export orientation, and innovation‐related cooperation as a starting point. It highlights how the interplay of strategies and resources affects innovativeness and heterogeneity of FIEs. The most innovative FIEs are endowed with a strong human capital base and R&D activities, which at the same time target export markets and whose cooperative partners involve firms other than their parent company. The results underline the necessity to differentiate between the different types of FIEs when examining their innovativeness.     

火炬水封罐溢流口位置的设置

水封罐是火炬系统防回火的重要设备之一,其溢流方式直接影响凝缩油的排放,而水封罐撇油、换水操作亦会对火炬系统产生影响.对典型的水封罐结构及溢流方式进行总结分析,结果表明:采用带挡板的水封罐可以明显减少换水量,而将溢流口设置在罐壁上可以有效撇油,并且能够避免撇油过程中的安全隐患.通过具体实例,给出典型罐壁开孔的水封罐结构及运行参数,并提出对于火炬水封罐溢流口位置设置的建议:设计中,优选在水封罐壁不同高度开口的方法,若采用连通管溢流方式,则需制定详细的撇油、换水作业操作规程,并严格执行.     

我国蓖麻良种选育研究现状及发展策略

通过分析我国蓖麻当前的良种选育和推广应用的现状和趋势,提出了蓖麻良种选育研究发展的若干策略,为今后我国蓖麻的发展提供参考.     

福建省连江县沿海防护林体系建设成效与对策

根据连江县沿海防护林体系建设情况,结合"十二五"林业发展规划,提出加强县域防护林体系建设的应对措施,为科学经营防护林提供依据,对建设海峡西岸经济区最前沿的一道绿色屏障具有重要的战略意义.     

多穗型青贮玉米科多8号制种技术比较

科多8号是中国科学院遗传研究所选育的青饲青贮玉米专用品种,深受北方农牧市场的欢迎。但由于制种生产比较效益较低等原因,群众没有制种积极性。文章结合多年来制种工作的经验和近年进行的一些试验研究,从播种期、父母本安排、去雄方法等方面进行深入研究探讨,并提出高效制种模式。     

绿色GDP中森林资源核算研究进展

绿色GDP核算是通过将资源环境成本纳入国民经济核算中来实现环境管理的一种有效的经济手段,其中如何合理地进行森林资源核算是绿色GDP核算的技术重点。从森林资源核算的内涵、理论与实践等角度进行了回顾与探讨,并指出在今后的研究中应进一步探索和完善现有的核算方法体系,加强森林经济、专业统计与绿色GDP核算的协调性研究,建立基于信息技术的森林经济、统计、绿色GDP核算一体化的整合体系,逐步克服技术、观念和制度等方面的困难,从而加快全面实施绿色GDP核算进程。     

监测口蹄疫抗体的液相阻断ELISA法的改进和体会

液相阻断ELISA（LBE）法由于具有高度的敏感性、特异性和重复性,目前被广泛应用于动物免疫抗体效果监测实践工作中,特别是为防控牛、羊亚洲I型口蹄疫（FMD）做出了积极的贡献。但该方法操作繁琐,稍有不慎就会导致实验结果发生偏差或试验失败,笔者就该方法应用于亚I型口蹄疫抗体检测中的改进和体会作一总结。