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中国农学通报 ›› 2014, Vol. 30 ›› Issue (25): 308-312.doi: 10.11924/j.issn.1000-6850.2014-0614

• 植物保护 农药 • 上一篇    下一篇

不同生境中紫茎泽兰幼苗的动态特征

王文琪   

  • 收稿日期:2014-03-10 修回日期:2014-05-23 出版日期:2014-09-05 发布日期:2014-09-05
  • 基金资助:
    国家重点基础研究发展规划项目 “农林危险生物入侵机理与控制基础研究” (2002CB111404)。

Dynamic Characteristics of Eupatorium adenophorum Seedlings in Different Habitats

  • Received:2014-03-10 Revised:2014-05-23 Online:2014-09-05 Published:2014-09-05

摘要: 为了研究入侵植物紫茎泽兰生长瓶颈阶段幼苗在不同生境中的适应性动态变化,在四川省德昌县比较研究了非农作的林区、农林交错带及撂荒地3种生境下紫茎泽兰幼苗适应各自不同环境的生长特征。结果表明:(1)幼苗的增长有2个高峰:第1个阶段为7月中旬到9月中旬,第2个阶段为翌年春季进入3月份以后,2个高峰之间为平缓增长期。(2)林区内幼苗的生物量增速均显著低于其余2个生境;而撂荒地和农林带生境增速在第2个生长高峰前相近,之后农林带的生物量增速显著高于撂荒地。(3)越冬生长1年后农林带幼苗密度显著高于其余2个生境。从而说明农林交错带是最适合紫茎泽兰幼苗生长的,也是最容易被入侵的生境。

关键词: 引诱性, 引诱性

Abstract: The research aimed to investigate adaptive dynamic variations of seedlings of an invasive plant, Eupatorium adenophorum in bottleneck stages in different habitats. In Dechang County of Sichuan Province, the author comparatively studied growth characteristics of E. adenophorum seedlings adapting to 3 different environments of non-farming forestland, farm-forest ecotone and abandoned land. The results showed that: (1) growth of seedlings had two peaks: the first phase was from mid-July to mid-September and the second phase started in March of the next spring, the period between two peaks was a slow growth phase; (2) biomass growth of seedlings in forestland was significantly lower than in the other two habitats; growth in abandoned land and in farm-forest ecotone were close before the second growth peak, and afterwards biomass growth in farm-forest ecotone was significantly higher than that in abandoned land; (3) after overwinter one-year growth, the seedling density in farm- forest ecotone was significantly higher than that in the other two habitats. These results demonstrated that farm-forest ecotone was the most suitable for seedling growth of E. adenophorum and was the most vulnerable habitat as well.