摘要
杉木是中国南方重要的用材树种和造林树种,杉木人工林的复合经营不仅能够提供经济价值也能够改善单一化种植导致的生态问题,为该树种建立合适的一元材积表、计算材种出材率能有助于复合经营方式的精准决策。以广西国有高峰林场为研究区,采用地面激光扫描技术获取立木点云数据,提取并计算立木参数,建立一元材积模型和削度模型,编制一元材积表和材种出材率表。结果表明:激光点云所提取的胸径与实测胸径所拟合的线性模型斜率为0.9921,R^(2)为0.9821;研究区最优杉木一元材积模型为指数模型,该模型R^(2)为0.9563,总相对误差和平均系统误差均在±5%以内,编制一元材积表可用于研究区杉木的立木材积估计;研究区最优杉木削度方程为改进4参数的Schumacher模型,模型的R^(2)为0.9368,并以单木结果推算林地单位面积平均径级材种出材量并编制材积表。
Cunninghamia lanceolata (Lamb.) Hook. is an important timber tree species and afforestation tree species in southern China. The complex management of Chinese fir plantation can not only provide economic value but also improve the ecological problems caused by single planting. Establishing a suitable one-dimensional volume table for this tree species and calculating the yield of timber species can help to make accurate decisions on the complex management mode. Taking Guangxi Gaofeng State Owned Forest Farm as the research area.The point cloud data of standing trees were obtained by ground laser scanning technology, and the parameters of standing trees were extracted and calculated. A single volume model and a taper model were established, and a single volume table and a timber yield table were compiled. The slope of the linear correlation equation between the DBH extracted by laser point cloud and the measured DBH was 0.992 1 with R^(2) of 0.982 1. The optimal one-dimensional volume model of Chinese fir in the study area is an exponential model with R^(2) of 0.956 3. The total relative error (TRE) and mean system error (MSE) are within ±5%. The one-dimensional volume table can be used to estimate the standing volume of Chinese fir in the study area. The optimal cutting equation of Chinese fir in the study area was the improved four-parameter Schumacher model, and the equation R^(2) was 0.936 8. Finally, the merchantable volume per unit area of the forestland was calculated based on the timber yield per tree, and the timber yield table of each diameter class was compiled.
作者
林秀云
孙圆
刘晨曦
姚睿涵
周春国
曹林
曹福亮
Lin Xiuyun;Sun Yuan;Liu Chenxi;Yao Ruihan;Zhou Chunguo;Cao Lin;Cao Fuliang(Co-Innovation Center for Sustainable Forestry in Southern China,Nanjing Forestry University,Nanjing 210037,P.R.China)
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2022年第1期33-39,共7页
Journal of Northeast Forestry University
基金
江苏省自然科学基金面上项目(BK20191388)
江苏省研究生科研创新计划项目(KYCX20_0900)
南京林业大学大创项目(2020NFUSPITP0235)
江苏省高校优势学科建设工程自助项目(PAPD)。
关键词
杉木
复合经营
激光扫描
一元材积表
削度方程
材种出材率
Cunninghamia lanceolata(Lamb.)Hook.
Complex management
Terrestrial laser scanner
One-dimensional volume table
Taper equations
Timber-produced rate
