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四川攀西地区紫茎泽兰的入侵现象及入侵机理
Authors
王玉兰
高贤明
Publication date
1 January 2003
Publisher
Abstract
<正> 20世纪70年代末至80年代初,紫茎泽兰(Eupatorium adenophorum Spreng.)从云南传入四川攀西地区(攀枝花市和凉山彝族自治州),1997年已蔓延该地区所有18个市、县、区。根据2003年春季我们的实地调查表明,攀枝花市目前紫茎泽兰分布面积至少有50000hm~2,比1996的19334hm~2(杨喜荣等,1996)增长2倍以上。每年3~5月份是紫茎泽兰种子成熟并传播的季节,种子落在由于人类活动而留下的裸地上后雨季随之到来,促进了种子的萌发与定居。所以,人类活动影响、气候变化节律与紫茎泽兰生物学特征的吻合是紫茎泽兰在我国西部蔓延
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Last time updated on 09/11/2016