我国越南安息香的地理分布及其气候特征

用查阅资料和实地调查相结合的方法，对越南安息香在我国的天然与人工分布及其气候特征进行分析。结果表明：越南安息香零星分布于我国北纬21°28’48”～2939’00”，东经98°39’00”～118°09’36”，生境片段化严重，种群内个体数量少或为孤立木；通过人工引种栽培，目前其分布的最北端为北纬30°11’24”；在云南和贵州分布区，越南安息香多分布于海拔1000～2000m；在中东部分布区，集中分布于200～1000m，偶见于〈200m的低海拔地区。根据天然分布区的气象资料，总结出越南安息香对温度、光照和水分等气候指标的需求特点。在引种栽培基础上，结合分布北缘和特殊分布点的气候特征，推出越南安息香潜在的适宜生长区，井提出引种驯化的首选种质。

Climate Characteristics of the Geographic Distribution Areas of Styrax tonkinensis in China

The natural and artificial distribution and Styrax tonkinensis in China was studied and the climate characteristics of the distribution zones were analyzed by means of integrating literature consultation with on-the-spot field survey. The study showed that S. tonkinensis was oddly distributed in the range of 21°28＇48＂- 29°39＇00＂N, and 98°39＇00＂ -118°09＇36＂E naturally, the population was usually small with few individuals, or it even grew individually, indicating whose living habitat had been severely fragmented. The utmost northern distribution of S. tonkinensis was extended to 30°11＇24＂ N by artificial introduction. Regarding the elevation, S. tonkinensis was mainly distributed at 1 000 -2 000 m in Yunnan and Guizhou provinces, while it was primarily distributed within 200 - 1 000 m, and occasionally distributed in areas lower than 200 m in the central and eastern distribution areas. The requirement for temperature, solar radiation and moisture by S. tonkinensis were summarized according to mete- orological data of its natural distribution areas. Based on analyzing the introduction and cultivation result, the climate characteristics of northern margin of its distribution and some special distribution areas, the potential suitable growing area and the preferable germplasm for introduction and domestication of S. tonkinensis were proposed.