基于三维激光点云的城市绿化树种材积及树干碳储量无损精确测算  

Nondestructive and accurate measurement of volume and stem carbon storage for urban greening tree species based on terrestrial laser scanning point cloud

作　　者：徐诗宇 施拥军[1,2,3,4] 冯晟斐 XU Shiyu;SHI Yongjun;FENG Shengfei(State Key Laboratory of Subtropical Silviculture,Zhejiang A&F University,Hangzhou 311300,Zhejiang,China;Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-efficiency Utilization,Zhejiang A&F University,Hangzhou 311300,Zhejiang,China;Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration of Zhejiang Province,Zhejiang A&F University,Hangzhou 311300,Zhejiang,China;School of Environmental and Resource Sciences,Zhejiang A&F University,Hangzhou 311300,Zhejiang,China)

机构地区：[1]浙江农林大学亚热带森林培育国家重点实验室,浙江杭州311300 [2]浙江农林大学浙江省竹资源协同创新中心,浙江杭州311300 [3]浙江农林大学浙江省森林生态系统碳循环与固碳减排重点实验室,浙江杭州311300 [4]浙江农林大学环境与资源学院,浙江杭州311300

出　　处：《浙江农林大学学报》2018年第6期1062-1069,共8页Journal of Zhejiang A&F University

基　　金：国家自然科学基金资助项目(31370637;61190114;31500520);中央财政林业推广项目(2017TS07);中国绿色碳汇基金项目(H20170049);浙江省重点科学技术项目(2015C03008)

摘　　要：城市森林是森林碳库的重要组成部分。为探索三维激光扫描技术(TLS)在无损精确测算城市绿化树种树干材积及碳储量方面的潜力,了解不同区分段长度对基于TLS测算树干材积的影响并对现有模型测算的树干材积及碳储量的精度进行了评估,采集30株无患子Sapindus mukorossi点云,并按径阶采集树干钻芯样本,研究在不同区分段长度下测算的树干材积及碳储量,并与现有模型的测算结果相比较。结果表明:(1)基于TLS能够提取高精度的立木胸径和树高(平均相对误差分别为1.97%和4.85%),可实现城市绿化树种树干材积及碳储量的无损精确测算。(2)基于TLS在区分段长度小于0.50 m时能测算得到高精度的树干材积。(3)城市绿化树种的材积和树干碳储量与野外林分存在显著差异(P<0.05)。现有模型并不适用于城市绿化树种。Nondestructive and accurate measurement of stem volume and carbon storage for urban green tree species play an important role in forest carbon stock.To explore terrestrial laser scanning(TLS)potential,to determine the effect of different section lengths on measurement precision,and to evaluate the accuracy of the existing models,30 point cloud samples of Sapindus mukorossi were collected by TLS,and the stem drill cores were also sampled according to the diameter grade by CO250 to obtain stem volume and carbon storage data using different section lengths.Afterward these were compared with data derived from existing models.Results showed that.(1)The diameter at breast height(DBH)and tree height could be measured with high accuracy based on TLS with a mean relative error for DBH of 1.97%and for height of 4.85%.(2)Based on TLS,when the section length was less than 0.50 m,stem volume could be measured accurately.(3)The existing models(including one-way volume model and standard volume model and stem carbon storage model)are not suitable for the stem volume and carbon storage of urban greening tree species,as the result of one-way ANOVA are significant(P<0.05).Therefore,TLS is reliable in the field of nondestructive and accurate measurement of stem volume and carbon storage for urban greening tree species.[Ch,4 fig.2 tab.27 ref.]

关 键 词：森林测计学 三维激光扫描 树干材积 区分段长度 树干碳储量 

分 类 号：S758[农业科学—森林经理学] S771[农业科学—林学]