京北山区水源保护林的现状与发展策略

该文在野外调查工作和对“八五”二类调查资料统计分析的基础上,通过对京北山区(包括密云、怀柔、延庆、昌平四县)水源保护林现状的总体分析和对密云县北庄乡的典型分析,指出林种比例不当及树种资源单一是该区水源保护林发展中存在的比较突出的问题.该文从多林种、多树种配置,造林树种选择和林分结构的优化与调整方面提出现有林的发展策略,并提供了现有林的经营类型和对应各种立地类型的造林树种.

Present Situation and Development Strategy of Water Conservation Forests in North Beijing Mountain Area

The status of water conservation forests in north Beijing mountain area was analyzed on the basis of a great deal of field experiment as well as the investigation dada during the period of the eighth “Five Years' Plan”. Both the whole north Beijing mountain area (including Miyun, Huairou, Yanqing and Changping counties) and a representative site (Beizhuang of Miyun county) were studied. It was pointed out that the unsuitable proportion of different category of forests and the singularity of tree species were remarkable problems in this area. The development strategies were brought forward from multiple categories of forest composition, selection of tree species and their configuration, optimization and reconstruction of stand structure. The management types in different stands and forestation tree species under different site types were also provided.