机构地区: 湛江海洋大学农学院
出 处: 《甘肃农业大学学报》 1998年第1期68-73,共6页
摘 要: 系统地研究了林分株数调查的线截抽样原理与方法。在不同的针叶林和阔叶林中进行了试验,并与传统的样地法进行比较,结果表明,该方法可行、可靠,抽样效率高。样线越长,精度越高,样线长度以截取须7株以上,10株为好,抽样效率比普通的样地方法高出4倍以上。 In this paper the authors have introduced the principle and method of line interest sampling for estimating tree number in the forest woodland. An experiment was conducted to estimate stand tree number in different kinds of forest woodland in the needle leaved wood and broad leaved woodland. We compared the method with plot. The forest land and sampling efficiency of line intersect sampling is higher than that of plot sampling.