中文摘要：

以LAI-2000冠层分析仪的应用为基础,对上海园林几种主要常绿阔叶树木黄杨Buxus sinica、桂花Os-manthus fragrans、广玉兰Magnolia grandiflora和香樟Cinnamomum camphora单株植物的树高、枝下高、冠幅、基径/胸径、三维绿量等形态特征数据和叶面积指数（ILAI）进行测量分析。结果表明：4种植物的形态特征数据之间均有显著性正相关;黄杨受修剪影响,单株ILAI与形态特征数据无显著相关性,但叶总量与树高、三维绿量有极显著正相关;桂花和广玉兰单株ILAI与树高、三维绿量有极显著正相关;香樟随树木成长枝干横向生长的影响,单株ILAI与树高呈显著负相关,但其叶总量与形态特征数据呈极显著性正相关;平均单株ILAI灌木类大于乔木类,而平均单株叶总量却恰恰相反;反映出不同生活型的植物其树枝叶片的空间分布是有明显差异的。同时,根据上海植物园多年的单位叶面积生态效益数据,结合相关ILAI方程,建立了单株植物生态效益模型公式。

英文摘要：

By using LAI-2000 canopy analyzer,the data of several morphological features and leaf area index（ILAI） of four main evergreen broad-leaved species in Shanghai such as Buxus sinica,Osmanthus fragrans,Magnolia grandflora and Cinnamomum camphora were measured and analyzed,including tree height,under crown height,crown width,basal diameter for shrubs and DBH for high trees.The morphological features were significantly positively correlated among four species;there was no significant correlation between ILAI and the data of morphological characteristics in Buxus sinica by the impact of pruning,but there were highly significant positive correlation between the leaf total biomass and tree height,tri-dimensional green biomass.In Osmanthus fragrans and Magnolia grandflora,among the ILAI,tree height and tridimensional green biomass showed a significant positive correlation.For Cinnamomum camphora turning to grow lateral branches when it growing up,single plant ILAI and tree height were significantly negatively correlated,but between the leaf total biomass and the data of morphological characteristics still showed a highly significant positive correlation.The average single plant ILAI of shrubs was larger than that of arbor,by contrast,the average leaf total biomass of shrubs was less than that of arbor,it was showed that there was a significant difference among the spatial distribution of branches of plants of different life type.Meanwhile,according to the data of unit leaf area eco-efficiency for many years from Shanghai Botanical Garden,combined with the relevant ILAI equation,the plant eco-efficiency model formula of a single plant was established.