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不同光环境的四川大头茶幼苗的生态适应
引用本文:肖春旺,刘玉成.不同光环境的四川大头茶幼苗的生态适应[J].生态学报,1999,19(3):422-426.
作者姓名:肖春旺  刘玉成
作者单位:1. 中国科学院植物研究所植被数量生态学开放实验室,北京,100093
2. 西南师范大学生命科学系,重庆,630715
基金项目:国家自然科学基金,贵州省自然科学基金
摘    要:将4年生的四川大头茶幼苗置于按全光照百分率为100%(S100)、55%(S55),33%(S33)和18%(S18)的人控光环境下处理。结果表明,不同光环境的四川大头茶幼勒的叶数,叶面积和叶大小的生长动态具有显著差异,且全光照的幼苗生长动态曲线波动最大,主要是因为日照胁迫所致,S100的幼苗地上部分生长最差,S55生长最好,后遮阴强度增大而下降;地下根系生长随光强增加而增加,主分量分析能很好地反

关 键 词:四川大头茶  生态适应  光环境  幼苗
收稿时间:1997/4/20 0:00:00
修稿时间:1998/6/22 0:00:00

ECOLOGICAL ADAPTATION OF Gordonia acuminata SEEDLINGS IN DIFFERENT LIGHT ENVIRONMENTS
XIAO Chunwang and LIU Yucheng.ECOLOGICAL ADAPTATION OF Gordonia acuminata SEEDLINGS IN DIFFERENT LIGHT ENVIRONMENTS[J].Acta Ecologica Sinica,1999,19(3):422-426.
Authors:XIAO Chunwang and LIU Yucheng
Institution:Laboratory of Quantitative Vegetation Ecology; Institute of Botany; CAS; Beijing; China
Abstract:old year Gordonia acuminata seedlings were grown in full sun light(S100),55% of full sun (S55),33% of full sun (S33) and 18% of full sun light (S18).It has been found that the growth dynamics of G.acuminata seedlings,in terms of number of leaves,leaf area and leaf size,shew significantly difference in the different light environments.The graph of S100 seedling fluctuated largest,due to sun strees on growth in summer.Aboveground growth was the worst at S100 and it was the best at S55,For S55,there it was a growth reduction with reduced light exposure,and the boot growth show a steady increase with increasing light exposure.Principal Component Analysis provided a good explanation for the growth difference and ecological adaptation strategies of G.acuminata seedlings in different light environments.Difference was biggest between S100 and S55.S100 seedlings stood out by their relatively high investment of dry biomass in root grwoth and seedlings that were grown in shadow by their relatively high investment in aboveground leaf growth.
Keywords:light    Gordonia acuminata    ecological adaptation  
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