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CAS Workshop on Ecosystem Succession Theory and Practice of Ecological Restoration 小花山桃草季节生长动态及入侵特性的研究 杜卫兵1.
2 叶永忠2
彭少麟1 （1中国科学院华南植物研究所，广州 510650；2河南农业大学，郑州 450002） 摘要：2001年在郑州黄河沿岸对外来植物小花山桃草（Gaura parviflora）的生物学特性、地上生物量动态进行了研究。结果表明：小花山桃草单株地上生物量、叶生物量、茎生物量在6月25日达到最大，花序生物量在7月20日达到最大;在生长初期，小花山桃草占样方内所有植物生物量的78%，7月20日达100%；小花山桃草茎高及各构件的变化特征为：茎高、叶数和花序数在6月25日都达到生长高峰，随后茎高、花序数继续增长，叶数迅速降低；小花山桃草平均每株花序数为10.9枝，每个花序平均产134.23朵小花，产126.75粒种子，结实率为94.43%，败育率为5.57%；小花山桃草入侵与植株高大、幼苗期短、生长快以及具有较强的传播和繁殖能力有关。 关键词：小花山桃草；外来植物；生物学特性；生物量动态；入侵 Study on the
seasonal growing dynamics and invasive characteristics of above
ground of Gaura parviflora Du Weibing1 Ye Yongzhong2 Peng shaolin1 (1South China Institute of Botany, Chinese Academy of Sciences, Guangzhou
510650, China; 2Henan Agricultural
University, Zhengzhou 450002, China) Abstract: In this paper，a research was made on the biological characterstics, the biomass
dynamics above the ground of
Gaura parviflora which is an exotic plant. The results showing: The
biomass above the ground of individual Gaura parviflora, the biomass
of leaves and the biomass of stems all get to the maximal number in
June 25. The biomass of anthotaxies gets to the maximal number in
July 20; The variational characteristics of the highness of stem and
every component are: the highness of stem、the
numbers of leaves and the numbers of anthotaxies all get to the
maximal numbers in June 25，subsequently，the
highness of stem and the numbers of anthotaxies continue to
grow, but the numbers of leaves reduce rapidly；The
average number of anthotaxies of individual Gaura parviflora is
10.9,every anthotaxy breeds 134.23 flowerets and 126.75 seeds, the
ratio of burliness and unburliness is 94.43% and 5.57%；The main reasons of
its′invasion are bigger plant body、shorter
seedling period、 faster growing and the
ability of stronger dispersion and reproduction. Key words: Gaura
parviflora; exotic plant; biological characteristics; biomass
dynamics; invasion
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