我国橡胶林碳汇贸易潜力的实证分析

依据气候减缓项目选择可贸易的碳库，利用森林蓄积量扩展法，计算了2008年和2011年橡胶林碳汇量，进而以2011年为基期，测算了2015年我国橡胶林的碳汇贸易潜力。计算结果表明，到2015年，我国橡胶林碳汇贸易潜力为248.61万t，占现有碳储量的10.62%，碳汇量年均增长速度呈下降趋势，显示出我国橡胶林碳汇贸易潜力的后劲不足。最后提出了依靠内涵式增长途径来提升碳汇潜力的几点建议。     

试论诗歌作品是中国诗学研究的核心

中国诗学是对以诗歌作品为核心的诗歌事实的系统的理论化的认识。一直以来,诗歌作品却处于诗学研究边缘的位置上,是隐藏的核心。在今后的研究中,诗作要放在更加突出的位置上,形成以诗歌史为母体,诗歌作品为核心,包括诗人研究、文献研究、诗体研究、写作研究、诗论研究、范畴研究等一核心、多层次的诗学体系。     

Simulation of pressure caused by multiplication and swelling of Erwinia amylovora in intercellular space of host tissue

WhenErwinia amylovora grows, in an intercellular space of a host, and fills this space, further multiplication or swelling may create a pressure, and may cause tearing of host tissue. Theoretically, this bacterial pressure equals the actual water potential of the host tissue minus the water potential at which the bacterial biomass would completely fill the intercellular space, but without exerting pressure.Simulation runs indicate that, when the pressure increases, the extracellular slime ofE. amylovora shrinks by releasing water, thus allowing further production of bacterial dry matter. The slime remains around the bacterial cells as a dense substance, low in water content, having a strong capacity to swell when the pressure induces tearing apart of the host tissue. Simulation runs show that the pressure attains its highest values at evening and night.Some fire blight symptoms that illustrate the evidence of bacterial pressure are discussed.     

Germination response of Orobanche seeds subjected to conditioning temperature, water potential and growth regulator treatments

Broomrapes (Orobanche spp.) are parasitic weeds that cause significant losses of crop yield. Experiments were conducted to investigate the seed response to the artificial germination stimulant GR₂₄ in three species of Orobanche subjected to preconditioning under various temperatures, water potentials and with plant growth regulators. The highest germination percentages were observed in Orobanche ramosa, Orobanche aegyptiaca and Orobanche minor seeds conditioned at 18°C for 7 days followed by germination stimulation at 18°C. With the increase of the conditioning period (7, 14, 21 and 28 days), the germination percentage of O. ramosa and O. aegyptiaca progressively decreased. When conditioned at −2 MPa, the germination percentage was lower than at 0 and −1 MPa, especially at 13 and 28°C. Orobanche minor seeds could retain relatively high germination if conditioned at 18, 23 or 28°C, even after significantly extended conditioning periods (up to 84 days). GA₃ (30–100 mg L⁻¹), norflurazon and fluridone (10–100 mg L⁻¹), and brassinolide (0.5–1.0 mg L⁻¹) increased seed germination, while 0.01 mg L⁻¹ uniconazole significantly reduced germination rates of all three Orobanche spp. The promotional effects of GA₃ and norflurazon and the inhibitory effect of uniconazole were evident, even when they were treated for 3 days. Germination of Orobanche seeds was much lower when the unconditioned seeds were directly exposed to GR₂₄ at 10⁻⁶ m . This early GR₂₄-induced inhibition was however alleviated or even eliminated by the inclusion of GA₃ or norflurazon (10–50 mg L⁻¹) in the conditioning medium. On the contrary, the inclusion of uniconazole increased the inhibitory effect of GR₂₄, particularly in the case of O. ramosa.     

呼伦贝尔岭东南旱作丘陵区气候资源潜力分析

对呼伦贝尔市阿荣旗三道沟镇商品粮生产基地主要粮食作物的光合、光温、气候、气候-土壤资源潜力进行分析,结果表明热量条件是限制该地区粮食增产的主要非可控因素,如能改善热量条件,还有20%～30%的增产潜力;该地区的降水条件对玉米、大豆、马铃薯、水稻四种主要粮食作物的满足程度在80%左右,表明降水量及其季节分布是该镇粮食产量低的制约因素之一,存在的问题是水分利用率较低;土壤养分状况对马铃薯和水稻增产未表现明显的限制作用,而对玉米和大豆增产却是最主要限制因素。     

天水旱作区自然降水生产潜力的适度开发对策

通过10年的定点资料统计,分析了天水旱作地区自然降水生产潜力开发程度、适宜开发程度及可开发程度;并就资源和环境条件对水分生产潜力开发的制约问题进行了讨论,分阶段分层次提出了生产潜力适度开发对策措施。     

中国出境旅游市场潜力的空间分布及深入发展对策分析

在回顾中国出境旅游发展历程和市场规模变动的基础上,通过相关分析,我们发现中国出境旅游规模与人均GDP的相关度极高,这意味着中国的出境旅游市场主要分布在经济发达地区,文章进一步分析了中国出境旅游市场潜力的分布情况,并对中国出境旅游客源市场的深入发展提出了具体建议。     

伊犁河流域地表水资源优势及开发利用潜力研究

伊犁河流域是新疆地表水系最发达、径流最发育、水资源最丰富的内陆河流域,具有流域降水丰沛,径流补给充分,径流量大;水系发达,河川密布;水量变化较小、泥沙含量较少、水质较好的资源优势。但受经济发展水平及产业结构层次的限制,伊犁河流域水资源总体上仍处于利用效率低下、生产经营方式落后、综合利用潜力巨大的初级开发阶段。依据部颁SL201-9《江河流域规划编制规范》和流域整体规划目标,经过水资源多目标开发平衡分析与评价,给出了伊犁河流域水资源综合开发和合理配置远景规划方案。     

新疆塔里木盆地蒸发力的研究

本文首先对国内外蒸发力的计算方法进行了较全面的评述，然后利用Ｐｅｎｍａｎ法的修正式计算了塔里木。盆地的蒸发力，最后分析了该地区蒸发力的分布特征。     

小麦品种在低温下膜功能变化的生物物理学分析

本文以冬性及春小麦品种为试材，用示踪，液闪计数及测定电解质泄漏的方法，测定低温胁迫下膜脂的代谢和电解质渗透的变化，并根据热力学的原理，分析其生物膜上的化学反应和扩散过程及膜上物质通量Ｊｊ与跨膜电势Ｅｍ的函数关系。