In the text, we identify the phytotoxic substances in root exudates of cucumber by GC-MS, the root exudates was collected with Amberlite XAD-4 resin.

• 本文采用GC-MS分析法，鉴定了XAD-4吸附树脂连续收集黄瓜水培液所获得的黄瓜根系分泌物的种类。