宁夏罗山自然保护区不同林分水文调节功能初步研究

Preliminary study on hydrological regulation function of different stands in Luoshan National Nature Reserve, Ningxia

罗山国家级自然保护区是宁夏三大天然林区之一.是宁夏中部的水源涵养林和区域生态环境的重要屏障,研究该区域内不同林分水源涵养能力的大小,对于保护自然保护区内水源涵养林以及区域内森林资源的合理经营与保护具有重要的意义.本研究依据中华人民共和国林业行业标准《森林生态系统服务功能评估规范》(LY/T 1721-2008),通过测定研究区内不同林分样地的土壤径流量、土壤容质量、蒸散量等相关指标,对不同林分水文调节功能进行评估,得到以下结果:①研究区不同林分调节水量功能为油松>其他灌木>青海云杉>山杨>柠条>白桦.②研究区不同林分调节水量价值量和净化水价值量为油松>其他灌木>青海云杉>山杨>柠条>白桦.③研究区不同林分调节水、净化水物质量与其面积有显著正相关.

Luoshan national nature reserve is a water conservation forest in the middle area of Ningxia,and it's an important barrier to the regional ecological environment.It is significant to study hydrological regulation functions on different stands in this area.The result can help us to protect the water conservation forest and it also can provide advice to rational management of forest resources in this area.According to the forestry industry standard of the People's Republic of China"Forest Ecosystem Services Evaluate Specification"(LY/T 1721-2008),we calculated the quantity of water regulation and water conservation function values of different stands by measuring soil bypass flow,soil unit weight,and evapotranspiration,etc.The results show:(1)The hydrological regulation function of different stands in the study area is Pinus tabulaeformis>other bushes>Picea crassifolia>Populus davidiana>Caragana Korshinskii>Betula platyphylla.(2)The value of regulating water and purifying water of different stands in the study area is Pinus tabulaeformis>other bushes>Picea crassifolia>Populus davidiana>Caragana Korshinskii>Betula platyphylla.(3)There is a positive correlation between the regulation water quantity and the stand area in the study area.