重庆缙云山林地枯落物及土壤水文效应研究

 为了解中亚亚热带常绿阔叶林地的土壤状况,以重庆缙云山4种林分为研究对象,通过标准地调查、土壤物理性质及持水能力测定和入渗实验,对林地枯落物和土壤水分效应进行研究。结果表明:1)缙云山林地土壤具有较强的持水能力,1m深土壤持水能力为9.5013.17 mm。2)枯落物蓄积量为16.21～32.42t/hm2,枯落物持水率为针阔混交林>灌木林>常绿阔叶林>楠竹林,持水量为灌木林>针阔混交林>常绿阔叶林>楠竹林。3)菲利浦模型较好地反映研究地区不同类型林地土壤入渗过程。

Hydrological effect of forest litter and soil in Jinyun mountain of Chongqing

In order to know the soil characteristics of subtropic evergreen broadleaf forest in mid-Asia,four forest stands in Jinyun mountain of Chongqing was selected as objects.Through investigating standard spots,determining soil physical characteristics and water-holding capacity,and experimenting on soil infiltration,forest litter and soil hydrological effect was studied.The results indicated that the forest soils of 1m deep have an obviously strong water-holding capacity wlthin a range from 9.50 to 13.17mm.The litter storage amount is from 16.21 to 32.42t/hm².The sequence of maximal water retention rate of litter is the coniferous and broad-leaves mixed forestlands>shrub lands>evergreen broad-leaves forestlands> phyllostachys pubescens forestlands.The sequence of maximal water retention of litter is the shrub lands> coniferous and broad-leaves mixed forestlands> evergreen broad-leaves forestlands> phyllostachys pubescens forestlands.The Philip（infiltration） model can better reflect the soil infiltration process of different forest types in research area.