沿海黑松防护林低产、低质、低效成因的调查报告

Investigation Report on the Reasons of Low-yield, Poor-quality, Inferior-function of Coastal Protective Forest of Pinus thunbergii Parl.

在对山东省沿海黑松防护林进行典型调查的基础上 ,系统地阐明了导致黑松防护林大面积低产、低质、低效的原因 ,依据其立地条件和生长状况 ,划分了低效林类型 ,确定了其量化指标 ,总结提出了黑松低效林更新改造的主要途径和对策。

Contributing factors resulting in low-yield, poor-quality and inferior-function of coastal forest of Pinus thunbergii were systematically studied based on the typical investigation for Pinus thunbergii coastal protective forests in Shandong Province. The types of inferior-function forests were divided, indexes for quantification were determined, and the main methods and countermeasures for improvement and reproduction of Pinus thunbergii inferior-function forests were put forward according to the site and growth properties.