林下不同光照条件对走马胎苗木生长及光合特性的影响  

Influences of Illumination on the Seedling Growth and Photosynthetic Characteristics of Understory Ardisia gigantifolia

作　　者：毛世忠[1] 赵博[1] 蒋小华[1] 丁莉[1] 莫凌[1] 邓涛[1] 马虎生[1] 

机构地区：[1]广西壮族自治区,中国科学院广西植物研究所,广西桂林541006

出　　处：《西北林学院学报》2016年第1期21-24,41,共5页Journal of Northwest Forestry University

基　　金：广西自然科学基金项目(2013GXNSFAA019062);中国科学院“西部之光”人才培养计划项目(科发人教字[2012]179号);广西植物研究所基本业务费专项(桂植业13016,13010)

摘　　要：探讨走马胎(Ardisia gigantifolia)苗木在林下不同光照条件下的生长及光合特性,来寻找适合其生长的最佳环境。试验分3个处理:L1透光度20.2%,L2透光度为7.6%,L3透光度为4.0%,3个不同林下环境,每个处理3个重复。结果表明:苗高、地径,茎、叶和总干重,总叶面积,净光合速率、光饱和点、光补偿点及光下呼吸速率随着透光度递减而递减,其中,苗高之间没有显著性差异,其他指标各处理间均有极显著或显著性差异;根干重、根冠比、最大净光合速率大小为L1>L3>L2,处理间有极显著差异或显著性差异;表观光量子速率大小为L3>L1>L2,处理间有显著性差异。通过本试验结果分析,认为透光度为20.2%的林下环境最适合走马胎苗木的生长。In order to find suitable growing environments for Ardisia gigantifolia, seedling growth and photosynthetic characters of the plants in different light conditions were examined. Three levels of light transmittance were set up with triplicates： 20.2% （L1） ,7.6% （L2） ,and 4.0% （L3）. The results demon- strated that growth indices decreased with transmittance, such as seedling height, ground diameter, stem, leaf and total dry weights, total leaf area, net photosynthetic rate, light compensation point, light saturation point, and light respiration rate, in which differences were very significant or significant except for seedling height. Influences of different light levels on root dry weight, root cap ratio, and maximum net photosyn- thetic rate were in the order of LI〉L3〉L2 with were very significant or significant differences. The ap- parent quantum yield was in the order of L3〉L1〉L2 with significant differences among treatments. It was concluded after comprehensive consideration that understory environment with 20.2% light transmittance was the optimal condition for the growth of A. gigantifolia seedlings.

关 键 词：不同光照 走马胎 苗木生长 光合特性 

分 类 号：S567.19[农业科学—中草药栽培]