摘要
乐都县北山林区有六种主要森林群落类型,通过对其土壤物理性质、枯落物、枯落物水容量、土壤渗透和地下径流的测定分析以及涵养水源效能之估价,指出:该区森林群落土壤具有良好的涵养水源功能,表现为:土壤容重降低,孔隙度的增加,一公顷森林土壤能蓄水641-978t,枯落物的吸水量是它自身重的2.9-7.6倍;土壤的渗透速度远大于本区最大降水强度。
There are six main forest community types in the forest district ofthe north mountain of Ledu county, The test and analysis of the physicalpreperties of forest soil, forest litter, water absorption capacity, the inf-iltration velocity of soil and underground run-off as well as the estimateof the efficacy of water conservation point out that forest community so-it of this area contain good efficacy of water conservation. It shows th-at volume-weight is reduced and porocity is increased. The forest comm-unity soil of this area can conserve water about 461-978t/ha. The abso-rbing water capacity of forest litter is 2.9-7.6 more than its weight.The infiltration velocity of soil is far more than maximum rainfall inte-nsity of this area.
关键词
水源涵养林
枯落物
土壤渗透
Protection forest for water conservation
Litter
Infiltration velocity
Underground run-off
