论文部分内容阅读
我区于1984年5月开始至1985年11月完成了森林资源二类调查工作。这次调查的目的:一是摸清我区森林资源的现状和动态,包括数量和质量的变化、森林分布、结构和特点;二是了解山地经营利用情况和管理水平;三是掌握森林资源的消长动态,以便分析检验经营效果,为建立森林资源档案和合理利用资源,制定林业规划,调整林种布局,改变山区经济结构和广辟治山致富门路提供科学依据。一、调查方法和调查过程为了提高调查精度,本次调查采取抽样调查和小班调查结合,以抽样控制小班调查的方法。抽样采用成群抽样,布点以省连清
My area from May 1984 to November 1985 to complete the second category of forest resources survey. The purpose of this survey: First, to find out the status quo and dynamics of forest resources in our region, including changes in quantity and quality, forest distribution, structure and characteristics; second, to understand the mountain operation and utilization and management level; third is to master the forest resources Dynamic growth and decline in order to analyze the test management effectiveness, in order to establish a file of forest resources and rational use of resources, development of forestry planning, adjusting the layout of forest species, changing the economic structure of mountainous areas and widening access to cure the mountain to provide a scientific basis. First, the survey methods and survey process In order to improve the accuracy of the survey, this survey to take a sample survey and small class survey combined with sample control methods of small class survey. Sampling sampling, distribution points to save even Qing