辽东地区核桃楸天然次生林水源涵养特征研究

摘要

Experiments were conducted on water conservation ability of Juglans mandshurica natural secondary for-est .Result shows that :the more litter thickness of Juglans mandshurica natural secondary forest is ,the higher water holding capacity is ;the more soil thickness is ,the higher water holding capacity is .The slope gradient has significant effect on litter retention ,water storage and infiltration rate .Timbered soil water’s infiltration can be di-vided into three processes (transient change ,gradual change & steady change) .Litter layer ,which has a function of protecting soil rainwater storage ,increases storage and infiltration capacity indirectly .%对辽宁地区胡桃楸（ Juglans mandshurica）天然次生林水源涵养能力进行了试验研究。结果表明：胡桃楸天然次生林枯落物层厚度越大，持水能力越强，林下土层厚度越大，蓄水能力越强，且林地坡度对枯落物持水、土壤贮水、林地水分入渗速率有显著影响。林地土壤水分入渗可分为瞬变、渐变、稳变3个过程。枯落物层具有保护土层缓存降水的作用，间接地增大了土壤的贮水入渗能力。