车八岭林下植物叶绿素分布模式及对光照条件的响应

Chlorophyll Distribution Patternas of Understory Plants and Their Response to Light Condition in Chebaling

摘要: 采用样方法研究了广东省始兴县车八岭国家级自然保护区林下植物叶绿素含量与林冠开度、林下散射光立地因子、叶面积指数之间的相关性以及不同物种林下植物叶绿素含量之间的差异度.结果显示:大叶新木姜Neolitsea levinei和黧蒴Castanopsis fissa叶片叶绿素含量随林冠开度增加而增加;黧蒴叶片叶绿素含量随林下散射光立地因子增加而增加;木荷Schima superba及唐竹Sinobambusa tootsik叶片叶绿素含量随叶面积指数增加而增加;它们均达到显著的线性相关(P﹤0.05).在同种条件下,种间叶绿素含量差异显著.

Abstract: Relationships of chlorophyll from understory plants to canopy openness,understory indirect site factor(ISF) and leaf are index(LAI) were investigated using quadrat method.Spatial heterogeneity of chlorophyll content in Chebaling National Nature Reserve,Shixing County,Guangdong Province, was also investigated.The results indicated that chlorophyll content in leaved of Neolitsea levinei and Castanopsis fissa increased with canopy openness;Chlorophyll content in leaves of Castanopsis fissa increased with ISF,and chlorophyll content in leaves of Schima superba and Sinobambusa tootsik increased with LAI.All the above variables showed significant linear correlation with leaf chlorophyll content(P<0.05).This study also showed that chlororophyll content from different species varied significantly.