北京山区幼龄侧柏林主要林分类型土壤水分及理化特性研究

北京山区作为典型的干旱半干旱石质山地,土壤瘠薄,水资源严重亏缺,这已成为该地区造林成活率及林木生长最为主要的限制因子。侧柏作为本区的主要造林树种,在保持水土、涵养水源等方面发挥着重大意义,所以分析研究该树种的主要林分类型林地间土壤水分、物理性质及其养分条件显得尤为重要。通过设定标准地和定位观测的方法,研究了北京地区侧柏幼龄林主要林分类型的土壤特征,以便掌握各林分类型侧柏林地的差异。并通过林学措施最大限度地利用有限的天然降水,增加土壤水资源,使林木得以充分利用,为该地区以及干旱半干旱地区在适地适树的前提下,提高造林成活率、保存率,合理经营林木,提高林地生产力,扩大森林资源和恢复森林植被,充分发挥林地的水源涵养效能提供科学的理论依据。

Soil Moisture Content and Physical and Chemical Properties of Most Stands of Young Platycladus orientalis in Beijing Mountain Area

As the typical arid and semi-arid rocky mountain, the mountain area in Beijing has a barren soil and little soil water resource ,which has been the most important limit factor to the survival rates of trees and forest growth in this area. Platycladus orientalis are the principal tree species in this area and theyplay a very important role in water and soil conservation, water-reserving, etc. So it is extraordinary vital for us to study soil moisture,physical features and nutrients condition. The characteristics of soil in the main forest land in Beijing area has been studied in this research by the ways of establishing plots and chronic position monitor so as to make the best advantage from the limited natural precipitation, increase the soil water resource, and make the trees best utilize it by forestry measures. Additionally, the paper may afford scientific thereunder in increasing the survival rates of trees and forest land productivity, expanding forest resources, restoring plant, making the best use of the function of water-reserving on the premise of adaptable tree for adaptable stand in the arid and semiarid areas.