热带

Chen et al noted that there are three kinds of landfall typhoon tracks; subtropical high and polar front, whose evolutions and adjustments may modify typhoon movement, are the main synoptic systems which influence the track of landfall typhoon.

陈联寿等根据(1949-1976)年资料，指出：登陆台风路径可分为三类；副热带高压和极锋是影响热带气旋陆地路径的主要天气系统，它们的演变和调整会影响热带气旋的移向。

He also extended quasi-geostrophic non-acceleration theorem to primitive equation non-acceleration theorem.

他在国际上首创湿倾斜涡度发展理论和全型垂直涡度方程，成功地揭示青藏高原西南涡和夏季江淮流域的暴雨发展机理，揭示副热带高压形态变异的成因；证明创新的原始方程中的无加速定理以及大气运动的动力强迫和热力强迫的调配率；开展创新性气候动力研究，揭示中高纬和热带海气相互作用差异的机理及厄尔尼诺影响台风频率的机制，继承和发展了我国学者关于青藏高原对大气环流和天气气候影响的研究；在国际上首次把亚洲季风爆发分为三个阶段，证明由于中高纬度的强地转性和斜压性使其海气相互作用的特征与热带显著不同；首次用数值模式提出厄尔尼诺影响台风的机制，得到国际上的高度评价。

Based on the ecological characteristics, climate and humidity condition for the vegetation of the sporopollen from the both of the wells, the palaeovegetation types have been reconstructed. The result shows that the paleoclimate changes from tropical semiarid-subhumid climate to subhumid mid subtropical climate to subhumid south subtropical climate.

通过对两口钻井的孢粉植被类型、气温带和干湿度类型及孢粉谱的进一步分析，可将泉头组-青山口组沉积期的气候变化划分为三个演化阶段，自下向上依次为半干半湿的热带气候——半湿润的中亚热带气候——半湿润的南亚热带气候。

Among them,73 genera and 36 families,occupies 80.23% of the total number of the genera and 78.26% of that of the families, were tropically and subtropically distributed genera and families, the other 18 genera and 4 families,merely occupied 19.77% of the total number of the genera and 8.70% of that of the families,were temperately distributed genera and families,which suggested that the variation of the altitude might affect the plant composition of communities in some degree.

热带性成分科、属与温带性成分科、属各有36科、73属和4科、18属，分别占样地种子植物科、属总数的78.26%、80.23%和8.70%、19.77%，表明热带性区系成分在群落中的优势地位，同时一定数量的温带成分的入侵，反映出海拔高度变化在一定程度上对植物区系组成的影响，表明鼎湖山山地常绿阔叶林具有向中亚热带常绿阔叶林过渡的特点。

1College of Agronomy, South China University of Tropical Agriculture, Danzhou Hainan 571737; 2Hai Nan Land Reclamation Innovation Center of Science and Technology, Haikou Hainan 570206; 3Tropical Crops Genetic Resources Institute, Chinese Academy of Trop

1华南热带农业大学农学院，海南儋州 571737；2海南农垦科技创新中心，海南海口 570206 3中国热带农业科学院热带作物品种资源研究所，海南儋州 571737

However, the taxa of strictly tropical distribution are still underrepresented in the flora of southeastern Yunnan compared to Indo-Malaysian flora, and the families of mainly subtropical to temperate distribution, such as Magnoliaceae, Theaceae, Cornaceae, Styracaceae, Symplocaceae, Aquifoliaceae and Caprifoliaceae, are well represented in the flora. Some characteristic families of temperate East Asia, such as Diapensiaceae, Dipentodontaceae, Eupteleaceae, Grossulariaceae and Toricelliaceae are also present in the flora of southeastern Yunnan.

由於位於东南亚热带北缘山地及其地质历史原因，云南东南部的热带植物区系中严格热带分布的成分不多，仍以边缘热带成分为主，并有相对丰富的亚热带－温带科如木兰科、山茶科、山茱萸科、山矾科、忍冬科、冬青科等以及一些东亚和喜马拉雅特徵科，如岩梅科、十齿花科、领春木科、茶藨子科和鞘柄木科，显示了它与东亚温带植物区系也有较多联系。

The order of adaptability of the introduced plants is tropical Asian species, northern region of tropical Asian and subtropical region, tropical Africa, tropical Australia, and tropical America. Some family species showed better adaptability in Xishuangbanna Tropical Botanical Garden,such as Bignoniaceae, Myrtaceae and Mimosaceae, than others.

随着定植年份的推迟，引种植物总体适应程度和地方温度都呈增加的趋势，显示了地方气候的变暖趋势有益于热带引种植物适应西双版纳热带植物园环境，因此西双版纳热带植物园的植物保护作用可以进一步加强。

Tropical montane rain forest was investigated in Mengsong, south-west to Jinghong City ofXishuangbanna region in the south of Yunnan near the border between China and Myanmar. There are 623 species of seed plants belonging to 327 genera and 116 families in this forest. Analysis of areal types shows that 32.8% of the families are of tropical and subtropical type, 23.3% tropical to temperate type, and 18.1% typically tropical type. Areal types at generic level mostly are tropical (81.4%), in which 28.4% are of Indo-Malaysian type and 26.8% are of pantropic type.

西双版纳勐宋的热带山地雨林是一种东南亚热带山地雨林的北缘类型，它在植物区系组成上和群落学特征上是介于热带雨林和南亚热带常绿阔叶林之间的热带山地常绿阔叶林。

About 28 species: Africa, tropical Asia, Australia, two species in tropical South America, two species pantropical; one species in China.

大约28种：非洲，亚洲热带，澳大利亚，在热带的南美洲的两种，两种泛热带；在中国的一种。

1College of Agronomy,SCUTA,Danzhou Hainan 571737; 2Tropical Crop Genetic Resource Research Institute, CATAS, Danzhou Hainan 571737

1华南热带农业大学农学院，海南儋州 571737； 2中国热带农业科学院热带作物品种资源研究所，海南儋州 571737

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。