山西农业大学学报（自然科学版）2017，Vol.37Issue(1)：28-34,7.
白桦幼苗对不同光环境的形态适应性响应
Morphological characteristics of the birch seedlings growing under different forest light environments
摘要
Abstract
[Objective]Forest light environment is an important factor affecting forest tree growth and complete the normal renewal process.In order to explore the illumination change influence on birch seedlings,in this study two kinds of forest light environments,open and understory,were selected.[Methods]The birch seedlings height,diameter ratio,specific leaf area,leaf area ratio,biomass and biomass allocation were measured,in order to investigate light adaptability of birch seedlings in the physiological and ecological characteristics,which would provide the basis for birch forest renewal,recovery and maintenance.[Results]The results showed that:under the open environment the leaf area ratio and leaf weight ratio of birch seedling was lower,but the plant height,stem diameter,root biomass,stem biomass,leaf biomass and total biomass increased significantly.After two growing seasons,root and total biomass ratio of birch seedling in shading environment decreased,stem and total biomass ratio,the aboveground and underground biomass ratio increased.No significant changes of birch seedlings in open environment occurred.[Conclusion]The birch seedlings had strong morphological plasticity and biomass allocation plasticity,and could adapt well to different forest light condition,coupled with the similar Quercus wutaishansea Mary light adaptation characteristics,the birch could be used forest reforestation work in the North China mountain.关键词
白桦幼苗/森林光环境/形态/生物量/生物量分配Key words
Betula platyphylla Suk seedlings/Forest light environmental/Morphological response/Biomass/Biomass allocation分类
农业科技引用本文复制引用
任达,王暾,郭晋平,张芸香,刘宁..白桦幼苗对不同光环境的形态适应性响应[J].山西农业大学学报（自然科学版）,2017,37(1):28-34,7.基金项目
山西省国际合作项目:(2015081001) （2015081001）
山西省攻关项目(20140311014-3) （20140311014-3）
高等学校博士基金(20121403110001) （20121403110001）
