摘要
研究了种植在次生常绿阔叶林下的版纳省藤Calamus nambariensis var.xishuangbannaensis、盈江省藤C.nambariensis var.yingjianggensis、多穗白藤C.bonianus和小省藤C.gracilis幼苗叶片的光合特性、叶绿体色素含量、比叶面积(ASLA)、形态解剖特征以及幼苗生物量。结果表明:版纳省藤、盈江省藤和多穗白藤的最大净光合速率(Pmax)显著地大于小省藤的,并且光饱和点(DLSP)与最大净光合速率表现出相同的变化特点;多穗白藤和盈江省藤的光补偿点及暗呼吸速率显著大于版纳省藤和小省藤的(p<0.05),并以小省藤的最低;单位面积最大净光合速率高的种,其叶片相对较厚、气孔密度较大、叶片单位面积的叶绿素含量及类胡萝卜素含量也相对较高,但比叶面积则较小;单位面积叶片光合速率与单位面积叶绿素含量成正相关,并随比叶面积的增大而减小;多穗白藤、盈江省藤和版纳省藤对弱光的适应能力较强,生长较快,适宜在次生常绿阔叶林下进行人工种植。
In order to understand the relationships among photosynthetic performance and leaf traits and growth of different rattan species,we measured photosynthesis,leaf anatomy,specific leaf area（ASLA） and biomass of Calamus nambariensis var.xishuangbannaensis,C.nambariensis var.yingjianggensis,C.bonianus,C.gracilis,which were planted in the secondary evergreen broadleaf forest in northern mountain region of Mengla County,Xishuangbanna.The results show that the maximum net photosynthetic rates（Pmax） of C.nambariensis var.xishuangbannaensis,C.nambariensis var.yingjianggensis and C.bonianus had no significant differences and that of three species were higher than that of C.gracilis;the light compensation points（DLCP） of the four rattan species showed the same trend with that of the Pmax,C.bonianus had the highest DLCP and RDRR,C.gracilis had the lowest DLCP and RDRR among four rattan species;moreover,the photosynthetic pigments content and leaf anatomy showed positively linear relationship but specific leaf area（ASLA） was converse relationship with the Pmax of four rattan species seedlings;the C.nambariensis var.yingjianggensis,C.bonianus and C.nambariensis var.xishuangbannanaensis had not only stronger adaption ability to weak light but also grew faster than that C.gracilis did.The results suggest that C.nambariensis var.xishuangbannaensis,C.nambariensis var.yingjianggensis,C.bonianus are feasible to plant in the secondary evergreen broadleaf forests in Xishuangbanna.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2010年第6期104-112,共9页
Journal of Central South University of Forestry & Technology
基金
中国科学院西双版纳热带植物园-勐腊县人民政府联合扶贫基金资助项目
