摘要
对 3个群落薇甘菊种群种子生产的 3个特征即花序特征、种子产量和种子千粒重进行了分析。结果表明 :不同种群中小花数、结实率、种子产量和种子千粒重存在显著差异 ,小花数变异范围为 932 81.6～ 15 4 6 98.0朵 /0 .2 5 m2 ;平均结实率为 2 5 .75 %～ 34.5 8% ;平均种子产量的变异范围为 2 36 73.4 0～ 5 2 6 16 .71粒 / 0 .2 5 m2 ;千粒重为 0 .0 880～ 0 .10 2 0 g。在以有性生殖为主的种群和以无性生殖为主的种群中 ,前者的种子较大。
Mikania micrantha is a worst weed that invaded South China.Three characters of seed production of M.micrantha populations were studied in this paper.The results showed that the mean flowers number,mean seed percentage,mean seed production and 1000 seed weight of these populations were various.The mean flower number ranged from 93281.6 to 154698.0 per 0 25 m 2 ,mean seed percentage ranged from 25.75% to 34.58% ,mean seed production ranged from 23673.40 to 52616.71 per 0.25 m 2 ,mean 1000 seed weight ranged from 0.0880 to 0 1020 g .Seed settled in population mainly with sexual reproduction was bigger than that in population mainly with asexual reproduction.Combined adaptation of M.micrantha to environment,the results have been discussed.
出处
《武汉植物学研究》
CSCD
2003年第2期143-147,共5页
Journal of Wuhan Botanical Research
基金
深圳市科技局项目 (2 0 0 0 0 10 80 )
广东省林业科技重点攻关项目 (2 0 0 0 -0 1)
国家自然科学基金重大项目 (3 98993 70 )
中国林业科学研究院重点基金资助。
关键词
外来杂草
薇甘菊
种群
种子生产
Exotic weed
Mikania micrantha
Population
Seed production
