论文部分内容阅读
一、前言由于立地等级的评值是制订合理经营措施改善立地条件,提高林分生产力,研究林分生长、收获量及制订森林调查规划的基础,故我国目前大力进行地位指数表的编制工作。根据现有的资料来看,编制方法虽各不相同,但大致可分成二个类型:一种是利用美国、B·胡希教授提出的移轴法;一种是利用我们过去编制地位级表时所采用的调整系数法。由于编表方法不同,致使利用同一资料编制的同一树种地位指数表有所差异。我们认为对这种差异的来源及影响必须加以分析,以便确定那种方法为优。而其鉴定的唯一标准,即二种方法所编制
I. Preface As the assessment of the site grade is to formulate reasonable management measures to improve the site conditions, improve stand productivity, study stand growth, harvest volume and the basis for the development of forest survey planning, so far, our country is making great efforts to compile the status index table. According to available information, although the preparation methods are different, they can be roughly divided into two types: one is the use of the axis-shifting method proposed by Professor Hugh B. In the United States, When used by the adjustment factor method. Due to the different methods of tabulation, the status index table of the same species with the same data is different. We believe that the source and impact of such differences must be analyzed in order to determine which method is superior. The only criteria for its identification, that is prepared by the two methods