山口红树林区互花米草有性繁殖期的生物量动态  

Biomass dynamics of Spartina alterniflora at its sexual propagation stage in Shankou mangrove area of Guangxi,China

作　　者：覃盈盈[1] 蒋潇潇[1] 李峰[2,3] 韦锋[1] 梁士楚[1] 

机构地区：[1]广西师范大学生命科学学院,广西桂林541004 [2]中国科学院亚热带农业生态研究所,长沙410125 [3]中国科学院研究生院,北京100039

出　　处：《生态学杂志》2008年第12期2083-2086,共4页Chinese Journal of Ecology

基　　金：国家自然科学基金(30660036);广西自然科学基金(桂科自0728096);广西教育厅科研资助项(200607LX241)

摘　　要：以山口红树林保护区互花米草(Spartina alterniflora)为研究对象,对其有性繁殖期(2007年6—11月)的生物量动态变化进行了初步研究。结果表明:在繁殖初期,不同营养器官的生物量随时间呈现不同程度的增加;但在繁殖后期,根、茎和叶的生物量的增长率均出现负值,其中根生物量和叶生物量的负增长导致茎生物量出现负增长。地下部分生物量远小于地上部分生物量,生物量在各器官的分配除6月份外呈现茎>叶>根>繁殖器官。地下部分生物量占总生物量的比例随着时间呈现下降的趋势,其中根系生物量比例从6月份的28.9%下降到11月的14.0%;繁殖器官生物量的比例不大,随着时间呈现增加的趋势。The biomass dynamics of Spartina alterniflora at its sexual propagation stage in Shankou mangrove reserve of Guangxi, China was studied from June to November 2007. The results showed that at the beginning of the sexual propagation stage of S. alterniflora, the biomass of different vegetative organs increased over time, while at late propagation stage, the growth rates of root, stem, and leaf biomass were all negative, and the negative growth rate of stem Was caused by the negative growth of root and leaf. The underground biomass was far less than aboveground biomass, and the biomass of different organs was in the order of stem 〉 leaf 〉 root 〉 reproductive organs in all months except June. The proportion of root biomass to total biomass was decreased from 28.9% in June to 14. 0% in November, and the biomass of reproductive organs only took a small part in the total biomass and increased with time.

关 键 词：互花米草 生物量 有性繁殖期 

分 类 号：Q948[生物学—植物学]