查询词典 tropical rain forest

Climatic gradients were based on data sets from 841 meteorological stations throughout China. Definitions for floristic distributional patterns were based upon the work of Prof. Z. Y. Wu. Most of these floristic distributional patterns were strongly correlated with the geographic gradients in climate, except for cosmopolitan, cultivated and invasive genera. Tropical genera form a large fraction of the total genera (ranging from 0.84% to 94.38% in the regional floras) with the highest proportion in southern Yunnan and Hainan Island. Tropical genera occur predominantly in southern China of 0° N latitude and decreased with increasing latitude, as would be expected. Interestingly, the disjunct Tropical Asia and Tropical America distribution were not restricted to southern latitudes. Temperate genera account for 5.1% to 98.83% of the total genera in regional floras with the highest proportion in the province of Xinjiang. Most of these genera followed geographic gradients in climate as expected (temperate genera conspicuously dominate the landscape at higher latitudes), except the East Asian and North American disjunct distribution, Eastern Asian distribution and Chinese endemic distribution. Generally, most plant genera demonstrated some correlation with climatic and geographic gradients. The most important gradients were those of annual air temperature and precipitation. A small fraction did not demonstrate significantly particular pattern:"Cosmopolitan","East Asian and North American disjunct","Eastern Asian" and "Chinese endemic" distributions. The North Temperate distribution had the highest correlation with mean annual air temperature and precipitation.

结果如下：(1)除世界分布、栽培和入侵成分外，大部分中国种子植物属的地理成分的分布与地理相关密切；(2)热带分布属（泛热带分布、热带亚洲至热带美洲间断分布、旧世界热带分布、热带亚洲至热带大洋洲分布、热带亚洲至热带非洲分布及热带亚洲分布合计）占各地方植物区系的0.84%到94.38%，其最低值出现在中国西北部的新疆和青海地区，最高值出现在中国云南南部和海南；(3)热带分布属在＜北纬30°的地区占优势，除热带亚洲至热带美洲间断分布外，其它热带成分随纬度增加迅速减少；(4)温带分布属（北温带分布、东亚和北美间断分布、旧世界温带分布、温带亚洲分布、地中海区、西亚到中亚分布、中亚分布和东亚分布合计）占各地方植物区系的5.1%至98.83%，其最高值出现在中国西北部的新疆地区，最低值出现在中国云南南部和海南；(5)除东亚和北美间断分布、东亚分布和中国特有分布外，其它温带成分随纬度增加迅速增加；(6)在温带成分中，东亚和北美间断分布及东亚分布属主要出现在中国亚热带到暖温带地区，北温带分布、旧世界温带分布和温带亚洲分布属在中国北部占优势，而地中海区、西亚到中亚分布和中亚分布属则在中国西北部占优势；(7)除世界分布、东亚和北美间断分布、东亚分布和中国特有分布外，所有其他成分都显示了与气候因素密切相关，其中，北温带分布属与年均温和年降雨量最为密切相关。

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热门点击：北京富强电热带 \电伴热带\ 电伴热\ 伴热带\ 电加热带\ 加热带\ 北京电热带 \富强电热带\ 恒功率电热带\ 自控温电热带 \防爆电热带 \自限温电热带 \硅橡胶电热带 \玻璃纤维电热带 \陶瓷履带式电热带\ 水箱保温电热带 \电伴热保温电热带 \化工管道防爆电热带 \输油管道专用防爆电热带\ 天然气管道防爆电热带\ 特种防爆电热带\ 海洋石油平台专用防爆电热带\ 船用防爆电热带\ 硅橡胶油桶电热带 \地采暖专用电热带 \消防管道专用防爆电热带 \仪表管线防爆电热带 \热电厂专用防爆电热带 \钢铁厂专用防爆电热带 \化工厂专用防爆电热带 \太阳能水管专用电热带 \水泥厂管道专用电热带\ 管道保温专用电热带\ 恒功率电伴热带 \自控温电伴热带\ 配电房除湿专用防爆电热带 \变电站除湿专用防爆电热带\ 高压电缆化冰雪专用防爆电热带 \制药厂冷却塔专用防爆电热带 \煤矿水管道专用防爆电热带\ 油气运输专用车防爆电热带\ 超长型特种防爆电热带等。

Great success had been obtained on prevention and cure of tropical diseases in China. Some tropical diseases, such as verminosis and infectious diseases what are harmful to people, were under control; However, To control tropical diseases faces with new problems, because of some new and reappeared communicable diseases,, modern rapid traffic and information being globalization. Therefore, controlling tropical diseases is still an important task in China.

我国热带病防治取得了显著的成绩，一些严重危害人们健康的寄生虫病和传染病在很大程度和范围内得到了控制；但新现和再现传染病，以及现代交通快捷和全球信息化，给热带病防治带来新的挑战，高素质热带医学专业人才的培养成为当前医学高等教育的重要工作。

On the basis of the distribution feature and the hypothesis about the radius of maximum wind within the circulation of a tropical cyclone,a lot of methods are designed to decide a tropical cyclone center with the pattern recognition technique.The aim of the applied study in operational tropical cyclone monitoring is to establish some objective positioning methods for the center of a tropical cyclone using a single Doppler radar radial velocity.

在假设台风环流存在最大风速半径的前提下，利用多普勒雷达径向速度场的这种分布特性和型态识别技术，进行近海台风的雷达定位客观方法的应用研究，并选取两种客观定位方法对台风中心位置进行估计。

The Value of Ci of leaf in Rain cultivation is less than in Open-air cultivation.The content of chlorophyl a and b of Rosario Bianco leaf in Rain cultivation is higher than in Open-air cultivation and the chlorophyl content of the 5th leaf is maximal in Rain cultivation. Stem diameter of Rosario Bianco were increased 8.68%~10.74% during the stage of rain growth in Rain cultivation. The study shows the leaf area of Rosario Bianco in greenhouse is lager than unsheltered and the environment of greenhouse is suit for grape leaf growing.

避雨棚对葡萄叶片的胞间二氧化碳浓度有抑制作用；避雨棚对'白罗莎里奥'叶片叶绿素a和叶绿素b含量的影响显著：避雨栽培条件0000下叶片的叶绿素均高于露天栽培，叶位5的叶片叶绿素含量最高；避雨栽培模式较露天栽培在避雨阶段葡萄茎粗增加了8.68%~10.74%且避雨栽培可显著增加葡萄叶面积。

Integrated analysis of 7 times heavy rain in Yunnan from July 19 to August 2 based on actual observation weather datum and satellite cloud atlas and Doppler radar image. The results show that: high-low southwest jet stream is important effect system. The maintenance of southwest jet stream provides water vapor, momentum, fast transfer of unstable energy for the lasting heavy rain. The further configuration of plateau shear line and southwest jet stream is necessarily condition about 7 times heavy rain. The lasting heavy rain appeared on big value region of 500hPa vapour flux and vapour flux divergence. The shear cloud band and subtropical high cloud band crossed and confluenced in Yunnan on the satellite cloud atlas. The maintenance and intensification of shear cloud hand and periphery cloud band of subtropical high correspond quite well to heavy rain falling region and cloud band distribution.

应用实测气象资料，结合卫星云图与多普勒雷达图像分析，对2007年7月19日到8月2日云南少有的7次强降水过程进行综合分析，结果表明：高低空的西南急流是重要的影响系统，西南急流的维持为持续性强降水过程提供了水汽、动量和不稳定能量的快速传递，高原切变线与西南急流的有利配置，是7次持续性强降水过程必不可少的条件；持续性强降水出现在500hPa水汽通量大值区和水汽通量散度辐合区；卫星云图上切变云带和副高外围云带在云南汇合，切变云带和副高外围云带维持、加强的过程与强降水落区的时空分布对应较好。

Biomass in the rain forest was far more than that in the plantation of 12 years,especially for the shrub layer.But the biomass of litterfall collected in the plantation was greater than that of the rain forest for the reason that Betula alnoidis defoliated in dry seasons.9 Four years observation found that soil bulk density tended to increase first, then decrease after planting trees;total soil porosity and non-capillary porosity tended to decrease and after few years they recovered to different degrees;the soil cation exchange capacity for all forest types increased;in the soil of 0-30cm depth,soil salt saturation tended to decrease;nutrient content in the soil of 0-60cm depth in the young stand tended to decline;soil effective P,effective K and N contents all tended to decrease.

山地雨林的总生物量远远大于10年生的西南桦人工林，其中灌木层的相对差别尤其巨大。94次的观测发现，人工林栽植后，土壤容重一般呈现一个先上升后下降的特点；而土壤非毛管孔隙度、土壤总孔隙度大多呈下降趋势，几年后有不同程度的恢复。

The plantation defoliated in dry seasons while the mountain rain forest was tall and dense evergreen broadleaved forest and kept green in dry season.The mountain rain forest\'s arbor layer contained 3 layers.Relatively open space under the canopy,rare shrub,sparse grasses,very tall wood vines and rich epiphytes were found in it.4 Afforestation did not change the life form spectrum significantly.

西南桦人工林的乔木层在旱季落叶，而山地雨林外貌为高大、常绿、茂密的阔叶林，即使旱季也仍保持林冠葱绿的外貌，乔木层可明显的分为3层，林下比较空旷，灌木植被少见，草本植物分散，另外具有高大的木质藤本植物和附生植物。4人工造林对群落的物种生活型谱影响不大。

Department of forest sciences is primarily dedicated to education and research in forest sciences including developing forest ecosystem management, improving forecasts of forest growth and yield, designing cost-effective forest regeneration practices, natural resources management, biometeorology, soil microbiology and biochemistry, horticulture and agronomy, animal science.

森林科学系主要致力于森林科学的教育及研究，其科学领域包括发展中的森林生态系统管理，改良森林生长和生产量的预测，森林重建实践的成本有效设计，自然资源管理，生物气象学，土壤微生物学和生物化学，园艺和农学，动物科学。

To study the effect of nematode-induced forest succession on avian communities, we chose three forest types at different seral stages, including evergreen broad-leaved coppice infested by the pine wood nematode for five years and evergreen broad-leaved forest infested for 12 years, both from Xiangshan County, Zhejiang, and one 40-year-old evergreen broad-leaved forest from Tiantong National Forest Park, Zhejiang.

为了探讨在松材线虫侵袭所引起的森林演替过程中植被结构变化对鸟类群落的影响，我们研究了这此常绿阔叶演替林中的鸟类群落结构。2004年5-6月，我们在浙江省宁波市选择了分别处于3个不同演替阶段的7个样地：包括象山县被松材线虫侵袭5年后的常绿阔叶灌丛和侵袭12年后的常绿阔叶林样地各3个，同时在天童国家级森林公园选择了约40龄的常绿阔叶林样地1个。

The United Kingdom has pledged to provide technical assistance to the peacekeeping effort in Darfur, including airlifting supplies and equipment to assist the African peacekeepers.

英国承诺为达佛的維和努力提供技术帮助，包括提供非洲的維和部队空运补給和裝备。

Results: The level of ET-1mRNA in placental villus was significantly higher in pre-eclamptic women than that in control group.

结果：妊高征组患者胎盘绒毛组织ET-1 mRNA的表达较正常妊娠组明显增高。