秦岭辛家山林区锐齿栎林水源涵养功能的若干特点  

Characteristics of Water Reservoir Function of Quercus aliene var. acuteserrata Forest in Xinjiashang Forest Region, Qinling Mountain

作　　者：杨茂生[1] 陈海滨[1] 高甲荣[1] 

机构地区：[1]西北林学院森林资源保护系

出　　处：《西北林学院学报》1991年第1期1-8,共8页Journal of Northwest Forestry University

摘　　要：通过2年对秦岭辛家山林区锐齿栎林的初步研究,结果表明该林分在水源涵养功能方面有以下特点:锐齿栎林下的穿透降水量分布极不均匀,变异系数为17.5～43.5％;在一次性降水过程中,林冠对降水的最大截持能力为3.8～8.5mm,并随林木的生长发育时期有所变化;林下枯枝落叶层的最大持水率为419～430％,对一次降水的有效蓄留能力为4.6～5.2mm;林地0～60cm土壤的有效蓄水量为605.4～667.8t/ha,是锐齿栎林生态系统中最大的水分贮存器和调节器;锐齿栎林林冠层、枯枝落叶层和土壤层对一次降水的最大调节能力为68.9～80.1mm,加之林地土壤有6.1～8.8mm/min的下渗率,因此锐齿栋林下很少出现地表径流。Describes the characteristics of water reservior function of Quercus aliena var. acuteserrata forest.1. The uneven distributied throughfalls varied from 17.5% to 43.5%.2 . The maximum canopy interception of a single preciptation amounted to 3.8-8.5mm and it was varied with the tree growing and developing period.3 . The maximum water holding capacity of litter layer reached 419-430%, and its effective holding capacity for a single preciptation was4.6-5.2mm.4. Effective holding caqacity of surface and under soil layer (0-60 cm) amounted to 605.4-667.8t/ha, being the largest water reservior and regulator in the Quercus aliena var. acuteserrata forest ecosystem. 5 . The maximum regulating capacity of the forest canopy, litter and soil layer of a single preciptation amounted to 68.9-80.1mm, and the infiltration rate of the forest soil was 6.1-8.8mm/min. Therefore, surface runoff seldom took place.

关 键 词：锐齿栎林 水源涵养 林冠截持 秦岭 

分 类 号：S792.18[农业科学—林木遗传育种]