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外来入侵物种紫茎泽兰的生物生态学特征与防治途径
Authors
余力
王玉兰
高贤明
Publication date
1 January 2003
Publisher
Abstract
<正> 紫茎泽兰(Eupatorium adenophorum Spreng.)主要靠产生大量的能随风飘移的种子四处蔓延以维持和扩大其种群。实地调查结果表明,在非农业用地内,紫茎泽兰的种子绝大部分分布在土壤表面或由于放牧活动而分布在2cm以内的土层中。在农业用地中,种子进入土层深度与耕作状况有关。在非耕地中,0~1cm土层中的种子约占90%,1~2cm占9%以上,2cm以下种子不到1%;在耕地中,0~0.5cm土层中的种子约占50%,0.5~5cm土层内有48%,5
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Last time updated on 09/11/2016