山东半岛北部黑松海防林幼龄植株更新动态及其影响因素  

Regeneration Dynamics of Young Pinus thunbergii and Its Influencing Factors in the Coastal Protection Forests in Northern Shandong Peninsula

作　　者：韩广轩[1] 王光美[1] 毛培利[1] 张志东[1] 于君宝[1] 许景伟[2] 

机构地区：[1]中国科学院烟台海岸带滨海湿地生态实验室中国科学院山东省海岸带环境过程重要实验室,烟台264003 [2]山东省林业科学研究院,济南250014

出　　处：《林业科学》2010年第12期158-164,共7页Scientia Silvae Sinicae

基　　金：烟台市科学技术发展计划项目(2008155);林业科技支撑计划项目(2009BADB2B502-01);国家自然科学基金青年科学基金项目(30800149);中国科学院烟台海岸带研究所前沿领域项目(A3JO708BX)

摘　　要：海防林是人工林生态网络系统的重要组成部分,也是海岸带地区典型的生态系统类型。印度洋海啸发生后,中国更加重视沿海防护林体系建设,制定了《全国沿海防护林体系建设工程规划（2006—2015年）》,规划土地总面积为4 471万hm2,Young trees are at the most sensitive stage to environmental stress in the life history of forest species,and they play a key role in maintaining and regenerating the population.An experiment was conducted to study the quantitative characteristics,growth dynamics of young trees and the effect of stand condition（adult tree,shrub layer and herb layer） on regeneration in Pinus thunbergii coastal protection forest in northern Shandong Peninsula.The mean density of young P.thunbergii trees was 4 024 tree.hm-2,in a range of 50-24 300 tree.hm-2.There was a positive exponential correlation between height and basal diameter,indicating that the young P.thunbergii population was at the rapid growth stage.Age structure of young P.thunbergii population was fairly complete,and it could be expressed as a one-humped curve.The middle-aged young P.thunbergii trees made up a large proportion,which indicated that the young P.thunbergii population stayed in a stable state currently.The height structure of young P.thunbergii population was of pyramid types,and the number of young trees decreased with increase in height grade.Most of young P.thunbergii trees were distributed in 0.3-0.9 m from a standing tree,and the number of young P.thunbergii trees decreased nearer to or far from the standing tree.Correlation analysis showed that the growth status of adult P.thunbergii trees was a driving factor to the regeneration of young trees,while shrub and herb layer had no relation to the regeneration of young trees.The forest crown closure might be a main influencing factor to the regeneration of young trees.

关 键 词：幼龄植株 更新动态 影响因素 黑松 海防林 

分 类 号：S718.54[农业科学—林学]