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期 刊 ：植物保护学报 1998年

关键词：小麦；竞争；阈值；经济防除；阔叶杂草；

Keywords:wheat, competition, threshold, economic control,

摘 要 ：作者对麦田阔叶杂草调查结果表明，麦田常发生阔叶杂草２０种，为害严重的８种，发生特点是前早、中缓、后快。作者选用高重积作为麦田阔叶杂草群落划分的标准。研究表明，阔叶杂草的各项生物指标经相关检验，以鲜重与小麦产量间关系密切。

Abstract:In this paper, studies on broadleaf weeds in wheat field, showed that 20 breadleaf weeds, 8 of which were most serious, and often appeared in wheat fields. Their appearance characters were early at earlier stage, slow at middle stage and fast at later sta

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