北京市侧柏人工林水源涵养功能的研究  

Study on Water Conservation Function of Platycladus orientalis Plantation

作　　者：段劼[1] 吕巍[2] 马履一[1] 林平[1] 怀慧明[1] 

机构地区：[1]北京林业大学省部共建森林培育与保护教育部重点实验室,北京100083 [2]国家环境保护部环境工程评估中心,北京100012

出　　处：《安徽农业科学》2010年第9期4956-4958,共3页Journal of Anhui Agricultural Sciences

基　　金：国家林业局"948"项目(2005-4-02);北京市教育委员会学科与研究生教育项目;2003北京市重点项目(2003-018-L18);北京林业大学科技创新计划(BLJD200904)

摘　　要：北京市生态公益林在改善首都空气质量、保持水土、涵养水源等方面起到了重要作用。研究了北京市山区主要生态公益林侧柏人工林的水源涵养功能,将其分为阳坡薄土、阳坡厚土和阴坡厚土3个立地类型进行研究,从土壤和林下枯落物2个层次进行分析。研究结果表明,阳坡薄土侧柏与其他2个立地类型相比,各层土壤容重最小、渗透性与孔隙度(总孔隙度、非毛管孔隙度)均最大,平均值分别为:1.267g/cm3、3.500mm/min、52.350%和13.766%;3个立地条件枯落物层的最大持水量依次为:37.67、92.31和56.08t/hm2。综合分析可知,阳坡薄土侧柏林地水源涵养能力最强,阳坡厚土次之,阴坡厚土最小,其土壤与林下枯落物总持水量依次为:1084.66、1027.91、1005.38t/hm2。Ecological forest of Beijing was all-important for improving air quality,conserving water and soil water conservation and so on. The ability of water conservation of Platycladus orientalis plantation in Beijing mountain area was researched and divided into 3 site types：sunny slope and thin soil,sunny slope and thick soil and shady slope and thick soil. Two levels of soil and litter were analyzed. The results showed that soil bulk density of the sunny slope and thin soil was the lowest but the permeability and porosity （total porosity and non-capillary porosity）,was the highest than other site type,the average values were 1.267 g/cm3,3.5 mm/min,52.350% and 13.766%; water-holding capacity of litter level of the 3 site types was 37.67,92.31,nd 56.08 t/hm2. Finally,the order of water conservation of these 3 site types was sunny slope and thin soil,sunny slope and thick soil and shady slope and thick soil and the totally water-holding capacity of the two levels was 1 084.66 ,1 027.91 and 1 005.38 t/hm2.

关 键 词：北京山区 生态公益林 侧柏人工林 水源涵养 枯落物 

分 类 号：S727.21[农业科学—林木遗传育种]