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本研究采用盆栽栽培技术,对包括板栗、杏、柿子、桃、核桃、梨和苹果等7个经济林树种的根系分泌物进行提取和分离,通过色谱rn/质谱（GC-MS）分析方法对其主要成分进行了检测.按照“中国环境优先污染物黑名单”和美国环保署标准,检测到的200余种有机分泌物中有3种属于优先控制污染物,即萘、二甲苯和邻苯二甲酸二丁酯.研究结果为密云水库上游水源保护区内选择适宜发展的低污染经济林树种提供了参考依据.图1表2参11.“,”In 2000 and 2001, 1-year-old seedlings of 7 economic tree species including chestnut, apricot, persimmon, peach, walnut, pear and apple were cultured in garden pots that had a diameter of 40 cm and were filled with clean sand. The major components of exudates released from their roots were isolated and analysed by GC-MS. Totally 200 kinds of organic chemicals were isolated, of which 3 kinds i.e. naphthalene, dimethylbenzene and dibutyl phthalate were principally controlled pollutants according to “Blacklist of Principal Environment Pollutants in China” and the standard of U.S. Environmental Protection Agency (EPA). The research result provided theoretical evidence for selecting low-pollution economic forest crops in the water source protection area in Miyun Reservoir.