摘要
对 3个群落中的薇甘菊Mikaniamicrantha种群幼苗的结构和动态进行了研究。结果表明 ,3个薇甘菊种群的幼苗具有相似的年龄结构 ,均是高龄苗多于低龄苗。种群 1有比种群 2和种群 3更多的高个体。 3个种群幼苗的生物量分配格局具有一定的相似性。叶的生物量最大 ,而根和茎所占比例在各种群间则稍有不同。薇甘菊幼苗的出生率和死亡率均较低 ,死亡集中在 3- 5月幼苗生长较快的季节 ,揭示这其间的某些环境条件极可能是其生存的限制因子 ,或这段时期是幼苗对环境条件最敏感的时期。
Structure and dynamic of seedlings of a exotic weed Mikania micrantha populations in three communities were studied. The results showed that age structure of seedlings in three communities were similar. High seedlings in community 1 were more than that in community 2 and community 3. Distribution pattern of biomass of seedlings in three communities was certainly similar. Biomass of leaf was the highest in the three populations, root biomass and stem biomass in the three populations were slightly different. Natality and mortality of seedlings of M micrantha population were low. Seedlings died mainly in the period from March to May when seedlings grow fast. It suggested that some environmental factors may be limiting factors to seedlings survived in this period.
出处
《中山大学学报（自然科学版）》
CAS
CSCD
北大核心
2002年第6期64-66,共3页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
国家自然科学基金重大资助项目 (39899370 )
广东省林业科技重点攻关资助项目 (2 0 0 0 - 0 1)
深圳市科技局资助项目 (2 0 0 0 0 10 80 )
