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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
【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。
【Abstract】 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.
【Key words】 Qinling Mountain; Xinjiashang; Quercus allena var. acuteserrata; Water reservior function; Canopy interception; Litter layer; Soil of forest land;
- 【文献出处】 西北林学院学报 ,Journal of Northwest Forestry University , 编辑部邮箱 ,1991年01期
- 【被引频次】34
- 【下载频次】128