中国亚热带常绿阔叶林优势种及常见种分布与Thornthwaite指标的关系

根据中国亚热带常绿阔叶林区域的气象资料和植物分布资料，计算了组成中国亚热带常绿阔叶林的１１２个优势种及常见种的Ｔｈｏｒｎｔｈｗａｉｔｅ潜在可能蒸散指标和湿度指标，利用其湿度气候分类和湿度气候分类对优势种和常见种进行了气候类型划分，分为５种类型并划分了优势种及常见种的Ｔｈｏｒｎｔｈｗａｉｔｅ水热指标分布类群，分别为：Ｇ１低温半湿润型，Ｇ２中温中湿型，Ｇ３中温湿润型，Ｇ４高温半湿润型，Ｇ５高温中湿型。

RELATIONSHIP BETWEEN THORNTHWAITE'S INDEXES AND DISTRIBUTION OF DOMINANTS AND COMPANIONS OF SUBTROPICAL EVERGREEN BROADLEAVED FOREST IN CHINA

Thornthwaite's potential evapotranspiration (APE ) and moisture index (IM) of 112 dominants and main companions of subtropical evergreen broadleaved forest in China have been calculated. The five climatic type of dominants and main companions have been divided using therma1 and moistural climatic classification. The groups of Thornthwaite's water-temperature distribution of dominants and main companions have been classified into five types. They are G1 (Microthermal semihumid type ), G2 (Mesothermal mesohumid type), G3 (Mesothermal humid type), G4 (Megathermal semihumid type), G5 (Megathermal mesohumid type). According t0 the result by calcu1ating climatological data of subtropical evergreen broadleaved forest zone using Thornthwaite's indexes, the potential evapotranspiration (APE) and index of moisture (IM) show geographical zonlities. There are close correlation among the climatological parameters and geographical indexes: latitude (LAT), longitude (LONG) and altitude (ALT). Their regression correlations show that in subtropical evergreen broadleaved forest region, while increasing each one degree of latitude towards north, APE would decrease 25. 28 mm and IM would decrease 3.09; while increasing each one degree of longitude towards east, APE would decrease 5.00 mm and IM would increase 4. 36; while increasing each 100 m of altitude, APE would decrease 18. 96mm and IM w0u1d increase 4. 55.