摘要
以早春类短命植物顶冰花为研究对象,采用全收获法对其生物量进行统计.结果表明：顶冰花的单株生物量平均为0.316 2 g,地下部分较地上部分平均高出37.92%.随着叶长的增大,叶生物量、果生物量、总生物量、地上生物量与地下生物量均显著增加,而花生物量显著减小.有性生殖生长与植株个体大小的关系密切,占总生物量的5.47%～19.42%,平均为11.92%;占营养器官的比例平均为14.41%,表现出随叶长的增大呈先增加后下降再增加的变化趋势.根冠比介于0.93～1.86,平均为1.33,随叶长的增大呈单峰型变化.整体来看,顶冰花的生物量有随生长发育由地上生长转为地下生长,再由地下生长转为地上为主的变化和从营养生长逐渐转向有性生殖的趋势.以叶长为自变量拟合顶冰花地上、地下和全株的4种生物量估测模型,除地下生物量的指数模型外,拟合和验证结果均达到相关建模的精度要求.
We investigated the biomass of Gagea lutea by using the whole harvest method,and analyzed the distribution characteristics of underground biomass and aboveground biomass,meanwhile,constructed biomass model of Gagea lutea. The results showed that：the mean individual biomass of Gagea lutea was 0. 316 2 g. Mean biomass of underground was higher than that of aboveground about 37. 92%. Leaf biomass,fruit biomass,total biomass,aboveground biomass and underground biomass were increased with leaf length enlarging,but flower biomass was decreased. There was a close relationship between sexual reproduction and individual size. The proportion of sexual reproduction biomass in total biomass was in a range from 5. 47% to 19. 42%,the mean was11. 92%;the proportion of sexual reproduction biomass in vegetation growth biomass was 14. 41%,and showed rise firstly after the fall to rise again with leaf length enlarging. The root-shoot radio was from 0. 93 to 1. 86,the mean was 1. 33,and assumed unimodal type change with the leaf length enlarging. In general,the increase of theGagea lutea biomass with the leaf length manifested as aboveground growth transformed into underground growth,and the growth of vegetative organ transformed into the growth of reproductive organ. The four biomass estimation models of Gagea lutea with the leaf length including aboveground biomass,underground biomass and total biomass all reached very significant level,except model of underground biomass by index equation.
出处
《北华大学学报（自然科学版）》
CAS
2016年第2期165-170,共6页
Journal of Beihua University（Natural Science）
基金
国家自然科学基金项目(31400387)
关键词
早春类短命植物
顶冰花
生物量
模型构建
spring ephemeral plants
Gagea lutea
biomass
estimating model
