西藏砂生槐分布特征及其平茬复壮技术  

Distribution characteristics and stumping-rejuvenating technology of Sophoramoorcroftiana in Tibet

作　　者：普布顿珠 侯伟 边巴多吉 普罗 许新勇 PubuDunzhu;HOU wei;BianbaDuoji;PuLuo;XUXinyong(Forestry Inventory and Planning Institute of Tibet Autonomous Region,Lhasa 850000,China)

机构地区：[1]西藏自治区林业调查规划研究院,西藏拉萨850000

出　　处：《林业建设》2020年第6期27-35,共9页Forestry Construction

基　　金：西藏森林抚育成效监测体系建设与示范项目(西藏自治区财政项目)。

摘　　要：基于西藏自治区2017年度林地变更调查成果、GDEMV2 30M分辨率数字高程数据,分析砂生槐在县域、海拔、经度、纬度、坡度、坡向、坡位7个方面的分布特征,并将盖度作为长势优劣的基本评价依据。运用多重对应分析方法分析各影响因子对砂生槐分布的影响程度。针对砂生槐普遍存在退化风险的实际,讨论了平茬复壮技术。研究结果表明:砂生槐主要分布于雅鲁藏布江中游地区,整体覆盖度不高;海拔、经度、纬度大尺度上,砂生槐分布均表现出先增大后减少;砂生槐喜生长于具有一定坡度、阳坡区域,且坡位属中下坡或沟谷;影响砂生槐空间分布的环境因子按其影响程度由大到小排序依次为:海拔>纬度>坡位>经度>坡度>坡向;初步认为,砂生槐适合采取平茬复壮抚育技术,预期实现扭转退化风险,促进林木健康生长。Based on the data of investigation results of forest land change in Tibet Autonomous region in 2017,GDEMV2 30M Resolution DEM,this paper analyzes the distribution characteristics of Sophoramoorcroftiana in seven aspects of county,altitude,longitude,latitude,slope,slope direction and slope position,and takes the coverage as the basic evaluation basis for its growth.Multiple correspondence analysis (MCD) wasusedtoanalyze the influence degree of each influencing factor on the distribution of Sophoramoorcroftiana.In view of the fact that there is a general risk of degradation of Sophoramoorcroftiana,the technology of stumping-rejuvenating was discussed.Results showed that the Sophoramoorcroftiana is mainly distributed in the middle reaches of the YarlungZangbo River,with low overall coverage,on the large scale of altitude,longitude and latitude,the distribution of Sophora japonica increased first and then decreased;it likes to grow in the area with certain slope and sunny slope,and the slope belongs to the middle and lower slope or valley;the environmental factors impacting Sophoramoorcroftiana spatial distribution from high to low was altitude,latitude,slope position,longitude,slope,aspect;it is suggested that the technology of stumping-rejuvenating should be adopted to reverse the risk of degradation and promote the healthy growth of Sophoramoorcroftiana.

关 键 词：砂生槐 分布特征 平茬复壮 抚育 

分 类 号：S793.9[农业科学—林木遗传育种]