林业科学2017，Vol.53Issue(2)：44-53,10.DOI:10.11707/j.1001-7488.20170206
不同遮荫、土壤排水处理对毛棉杜鹃幼苗生长及光合特性的影响
Influences of Different Shading and Soil Water Drainage on Growth and Photosynthetic Characteristics of Rhododendron moulmainense
摘要
Abstract
[Objective] This study aimed to select the suitable key cultivation conditions for growth of Rhododendron moulmainense and provide technical support for landscape application of R.moulmainense.[Method] The split-plot experiment design was adopted with different shading (0%,20%,50%,80%) as the main plot and different soil water drainage (high bed and flat bed) as the subplot.The plant increment and photosynthetic characteristics of R.moulmainense.were measured.[Result] The results showed that under 50% shading with high bed,the branch increment was greatest,and chlt (total chlorophyll content),Pmax(maximum net photosynthetic rate),AQY (apparent quantum yield),daily average Pn (net photosynthetic rate),daily average WUE (water use efficiency),and daily average Pn/PAR (photosynthetically active radiation) of R.moulmainense were relatively higher or the highest.The chla/chlb (chlorophyll a/chlorophyll b),LCP (light compensation point),LSP (light saturation point),and Rd (dark respiration rate) were relatively lower or the lowest.In contrast,under 0% shading with flat bed,the chlorophyll content,Pmax,AQY,daily average Pn,daily average WUE,and daily average Pn/PAR of R.moulmainense were the lowest,and the basal stem increment chla/chlb,LCP,LSP,and Rd were the highest.In general,with enhancing of shading (moderate shading) and soil water drainage,the branch increment,chlorophyll content and RWC appeared the trend of increasing gradually,while the other indexes all appeared the trend of decreasing gradually.[Conclusion] It is concluded that Rhododendron moulmainense is suitable for growing in the habitat with 50% shading and high bed.关键词
毛棉杜鹃/遮荫/排水/枝条生长/净光合速率/光响应曲线/光能利用率/水分利用率Key words
Rhododendron moulmainense/shading/soil water drainage/plant growth/Pn/photoresponse curve/Pn/PAR/WUE分类
农业科技引用本文复制引用
白宇清,谢利娟,王定跃..不同遮荫、土壤排水处理对毛棉杜鹃幼苗生长及光合特性的影响[J].林业科学,2017,53(2):44-53,10.基金项目
深圳市城市管理局科技基金项目(SZ201201). （SZ201201）
