protection forest

The study on the function of protection forest of water resources for regulating is still a new topics in China.

水源保护林的理水功能研究在我国尚属新兴的课题,作者在概括国内外现有研究的主要结果基础上,主要综合了我国在这方面的研究状况,重点分析和探讨了水源保护林在调节径流,保护水资源工程和保护水质(主要讨论减少泥沙危害)方面的作用和功能,并对用于评价水源保护林理水功能的试验研究方法作了一定的介绍。

On the basis of the studies on adaptability and absorption ability of tree species to the pollutants,the model and methods of the tree species planning for urban environment protection forests in the northwest China are put forward.

该文在研究树木对污染物的适应性及吸收能力的基础上，提出我国西北部城市环境保护林树种规划的模型和方法，并以包头钢铁稀土公司耐火材料厂为例进行树种规划。

Nutrient cycle of water resource protection forest of Pinus tabulaeformis in the Miyun Reservoir watershed of Beijing.;

密云水库流域油松水源保护林主要养分元素的生物循环

The current water conservation forest in the upper stream area of the Miyun reservoir of Peking City is analyzed.

针对北京市密云县密云水库上游清水河流域现有水源保护林类型现状,对油松林、刺槐林、板栗林及混交林4个林分类型的截留降雨、枯枝落叶容纳雨量、林地土壤蓄水、减少地表径流及净化水质能力进行了分析、比较和评价。

Based on the report about the forest management inventory during the Eighth Five Year Plan period in the suburbs of Beijing,and according to the different kinds of forest use and site,the 3rd class water conservation forest is classified as:ecological forest,ecological economy forest,economic ecology forest.

该文以北京市“八五”森林资源二类调查材料为基础，按不同林种类型和立地条件的组合因子，应用数据库数据处理方法，将三级区水源保护林划分为：生态型、生态经济型、经济生态型三个区。

By means of site measurement and comparison this paper presents the preliminary research advances on the soil moisture dynamics in the experimental area of water conservation forest in the watershed of Miyun reservoir.

通过定位观测和对比试验，对密云水库上游水源保护林试验示范区土壤水分的动态变化规律进行了初步研究。

Based on the report about the forest inventory in the suburbs of Beijing, and the principles of the ecology, productive function and sustainable development, 3 forest species and 18 forest types of water protection forest in Miyun reservoir watershed are classified as ecological forest, ecological economical forest and economical ecological forest.

水源保护林建设是保护森林环境，实现林业持续发展的重要基础。