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[目的]研究辽河源地区典型森林类型林下土壤的水文效应,为辽河源森林生态系统健康的监测和评价提供理论佐证。[方法]选取典型森林类型,采用不同入渗模型拟合各森林类型土壤的入渗过程。[结果](1)土壤容重变化范围为1.21~1.56g/cm3,油松中龄林最大,山杨成熟林最小;土壤总孔隙度变化范围为41.26%~54.38%,山杨成熟林最大,油松中龄林最小;(2)山杨成熟林土壤蓄水能力最强,为1 087.56t/hm2;油松中龄林土壤蓄水能力最小,为825.17t/hm2;(3)山杨成熟林稳渗速率最大,为1.33mm/min;(4)霍顿(Horton)入渗模型和菲利普(Philip)入渗模型能较好地反映各森林群落土壤入渗过程,但通用幂函数模型拟合结果较差。[结论]不同森林类型土壤均表现出随着土层深度的增加容重逐渐增加的现象,阔叶林林下土壤蓄水能力要强于针叶林,通过比较认为可以利用霍顿(Horton)模型作为研究该区森林土壤水文功能的重要手段。
[Objective] The research aimed to study the hydrological effects of soil under typical forest types in the Liaohe River source region, and provide theoretical evidence for the monitoring and evaluation of the Liaohe River source forest ecosystem health. [Method] The typical forest types were selected and different infiltration models were used to fit the infiltration process of soils in different forest types. [Result] (1) The range of soil bulk density varied from 1.21 to 1.56 g / cm3, the middle-aged stands of Pinus tabulaeformis was the largest and the mature forest of Populus was the smallest. The total soil porosity ranged from 41.26% to 54.38% (2) Poplar mature soil had the highest soil water storage capacity of 1 087.56 t / hm2; the soil water retention capacity of the middle-aged pine forest was the lowest (825.17 t / hm2); (3) (4) Horton infiltration model and Philip infiltration model can well reflect the soil infiltration process of each forest community, but the general power function model fitting results Poor. [Conclusion] The soil bulk density of different forest types showed a gradual increase of soil bulk density with the increase of soil depth. The soil water storage capacity of broad-leaved forest was stronger than that of coniferous forest. Horton model could be used to study The important means of forest soil hydrological function.