摘要
为了评价老秃顶子自然保护区不同森林类型土壤水源涵养功能,对区内5种植被类型的土壤贮水能力与入渗特征进行了研究。结果表明,不同林型0—40cm土壤容重均值为0.76～1.71g/cm3,非毛管孔隙度均值为8.15%～22.07%,毛管孔隙度均值为27.60%～53.28%,灌木林、岳桦林、杂木林等天然次生林的土壤孔隙状况要好于落叶松人工林和红松人工林;不同林型0—40cm土壤的蓄水容量为1 429.8～2 834.3t/hm2,有效蓄容为325.9～882.7t/hm2,毛管持水量为1 103.8～2 131.0t/hm2,天然次生林土壤贮水能力相对较强;不同林型0—20cm土壤初渗率介于0.28～21.1mm/min之间,20—40cm土壤初渗率介于0.07～6.7mm/min之间,不同林型0—20cm土层稳渗率介于0.14～8.3mm/min之间,20—40cm土层稳渗率介于0.05～2.0mm/min之间,初渗率和稳渗率均表现为天然次生林高于人工林;土壤入渗速率与入渗时间存在良好的幂函数关系。
In order to assess water conservational function of different forests types in Laotudingzi natural reserve,six forest soils were selected to test soil storage capacity and infiltration characteristics.The results indicate that soil bulk density（0—40 cm） under these forests ranged from 0.76 to 1.71 g/cm3,non-capillary porosity ranged from 8.15% to 22.07%,capillary porosity ranged from 27.060% to 53.28%,soil porosity conditions of natural secondary forests,such as shrub,Betula ermanii,Spinney,were better than Larix pricepis-ruprechtii and Pinus koraiensis,soil water storage（0—40 cm） ranged from 1 429.8 to 2 834.3 t/hm2,effective capacity ranged from 325.9 to 882.7 t/hm2,capillary water holding capacity ranged from 1 103.8 to 2 131.0 t/hm2,soil wate-holding capability of natural secondary forest was relatively stronger than plantation,initial infiltration rates（0—20 cm） ranged from 0.28 to 21.1 mm/min,and initial infiltration rates（20—40 cm） ranged from 0.07 to 6.7 mm/min,steady infiltration rates（0—20 cm） ranged from 0.14 to 8.3 mm/min,steady infiltration rates（20—40 cm） ranged from 0.05 to 2.0 mm/min,initial infiltration rates and steady infiltration rates of natural secondary forests were relatively stronger than plantation.A power function can be used to describe the relationship between soil infiltration rate and time.
出处
《水土保持通报》
CSCD
北大核心
2011年第1期109-113,共5页
Bulletin of Soil and Water Conservation
基金
辽宁省教育厅高等学校专项科研基金项目“辽西半干旱区林地土壤大孔隙特征及其对根层贮水和坡面产流的影响”(2008289)
关键词
土壤持水能力
入渗
水文效应
老秃顶子自然保护区
soil water-holding capacity
infiltration
hydrological effect
Laotudingzi nature reserve
