摘要
林木材积是我国森林资源监测的一项重要内容。海南省森林资源清查林木材积估计一直沿用广东省70年代未建立的一元立木材积表,已使用30多年,急需进行检验、更新。以海南省橡胶、桉树、相思、加勒比松、木麻黄5个树种单株立木材积实测数据,对海南省森林资源清查中使用的原一元立木材积方程进行适应性检验,更新建立新一元立木材积方程,并就原一元立木材积方程估计的森林资源清查林木材积偏差进行了分析。研究结果表明:海南省上述5个树种原一元立木材积方程均存在较大的系统偏差,每个树种总相对偏差(TRB)和平均系统偏差(MSB)均达到了15%以上,预估值明显低于实际值,已经不再适用;更新建立的5个树种新一元立木材积方程,其预估精度均在95%以上,总相对偏差(TRB)均在3%以内,平均系统偏差(MSB)接近于0,拟合效果良好;以5个树种新一元立木材积方程估计得到的2013年全省森林资源清查蓄积增加1.389 85×107 m3,增幅达23.80%。
The timber is an important content of forest resource monitoring in China. Forest volume estimation of continuous forest inventory in Hainan province has been adopted one-way stand volume which was established in 70 s in Guangdong province. Therefore, it is the urgent task to test and update stand volume equations for main tree species in Hainan province, such as rubber, eucalyptus, acacia, Caribbean pine and Casuarina equisetifolia, using measured data. In this paper, the adaptability of old one-way stand volumes used in continuous forest inventory in Hainan province are tested. The new stand volume equations of 5 tree species are established. At the same time, tree volume estimation deviation of 5 tree species by using old stand volume equations are analyzed. The results showed that: The deviations of the old one-way tree volume equations are extraordinary large. The total relative deviations and the mean system deviation are above 15%. The estimated values are significantly lower than the actual value. The old stand volume equations are no longer applicable in volume estimation in continuous forest inventory in Hainan province. The prediction precision of new established one-way tree volume equations are higher than 95%. The total relative deviations are basically between 3% and-3% and the mean system deviations are close to 0. The stand volume estimation using the new equations rise 23.80%, compared with estimation using the old equations, the increment reached to 13.8985 million cubic meter.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2017年第12期26-30,共5页
Journal of Central South University of Forestry & Technology
基金
国家林业局资助项目"海南省2013年森林资源清查"(HNHJ2013-04-004)
海南省林业厅重点项目"海南省加勒比松橡胶树等常用数表研建"(HNHJ2014-11-007)
关键词
立木材积
一元材积方程
材积表
森林资源清查
偏差
检验
更新
海南省
standing volume
one-way tree volume equation
volume table
continuous forest inventory
deviation
verification
updating
Hainan province
