泡桐农田防护林带单株树冠结构特征  

Individual Tree Crown Structure of Paulownia fortunei (Seem.) Hemsl in Shelterbelts

作　　者：樊巍[1] 赵东 王齐瑞[1] 杨海青[1] 赵辉[1] 凌小明[1] 

机构地区：[1]河南省林业科学研究院,郑州450008 [2]河南省生态林业工程技术研究中心,郑州450008

出　　处：《中国农学通报》2012年第7期85-88,共4页Chinese Agricultural Science Bulletin

基　　金：林业公益性行业科研专项"典型平原农区多目标农业防护林构建与可持续经营技术研究"(20070414);国家林业局黄淮海平原农田防护林生态系统定位研究站资助项目

摘　　要：冠层结构控制着叶面积及其分布,影响树木的生长,冠层分布影响林带的防护效益。为了解泡桐不同林带树冠的特性,2009年8月选取8年生单行、双行白花泡桐林带,研究其单木冠形、生长量、生物量、叶面积及其分布。结果表明,单行、双行林带单木的树高、胸径、冠长、冠幅、叶量、叶面积均无显著差异,而树干生物量有显著差异(P<0.05)。双行林带单木树冠外偏,呈非对称卵圆型。2个林带单木叶面积在冠内变化规律一致,由上层到下层,内层到外层均逐渐增加。单木叶面积是树高、胸径及冠长的函数。对单木冠层结构的分析可为林带冠层的变化及调控林带结构提供理论支持。Crown structure affects tree growth through controling leaf area and its distribution. The distribution of crown has important implications for shelterbelt ＇ s protective function. Some shelterbelts from 1-row and 1-row 8-year-old Paulownia fortunei （Seem.） Hemsl shelterbelts were selected in August 2009, aiming to understand crown characteristics of different shelterbelts. Crown shape, tree growth, accumulative biomass, leaf area and its variation in the crown were investigated. The results suggested that tree height, DBH, crown length, crown width, leaf accumulative biomass and leaf area hadn ＇ t all significant difference at the P0.05 level between 1-row and 2-row shelterbelt. However, stem accumulative biomass had significant difference. Crown shape was difference between a 1-row and 2-row shelterbelt, and it was asymmetry ovoid in 2-row shelterbelt. The variation tendencies of leaf area were the same for a 1-row and 2-row shelterbelt. Leaf area increased significantly with higher depth in the crown or from interior to the exterior of the crown. DBH, tree height and crown length were reliable predictors of leaf area at the tree-level. The research of the crown structure of Paulownia fortunei （Seem.） Hemsl based on 1-row and tow-row shelterbelts played a critical role in the insight the change of shelterbelt and managing shelterbelt crown.

关 键 词：树冠结构 白花泡桐 叶面积 防护林带 

分 类 号：S758.1[农业科学—森林经理学]