苏北淤泥质海岸森林立地分类和评价方法研究

RESEARCH ON SITE CLSSIFICATION AND SITE QUALITY EVALUATION FOR SEABOARD AFFORESTATION IN NORTH- ERN JIANGSU PROVINCE

本文以国营东台市林场的林地为主要研究对象,对影响林木生长的有关立地因子进行1年的定点、定时观测和分析,应用系统思想,根据综合主导因子,定性和定量相结合的方法对研究区进行立地类型划分,并进行立地质量评价。提出了一套适合于平原粉沙淤泥质海岸带特定生态条件的森林立地分类和产地质量评价方法。

According to field investigation and soil analysis on the littoral region of Dongtai forest station, this paper advances a suitable system and method of site classification and site quality evaluation. On the basis of ground water depth and soil salt content sieved from many restrictive factors, the investigation area may be divided into 7 site groups, then, with the aid of IBM computer, site groups are classified into 11 different site types by soil fertility. For the reason of Robinia pseudoacacia, the dominated forest tree species in this area, the paper establishes quantification site index table of the species and regression equation between average height of dominat trees in the stand and timber stores per hactare. So that, site quality of forest or afforested land as well may be evaluated, the author has worked out the site type table, predicated site productivity and also put forward suitable suggestion for the choice of silvicultural tree and forest management.