重庆缙云山几种典型植被枯落物水文特性研究

Research on Litter Hydrology Characteristic of Typical Vegetation in Jinyun Mountain in Chongqing City

通过对三峡库区重庆市缙云山4种典型植被类型(针阔叶混交林,阔叶林,楠竹林和灌木林)的林下枯落物的调查分析和进行枯落物持水过程研究,得到不同植被类型枯落物的持水特征。结果表明枯落物储量为灌木林>阔叶林>针阔混交林>楠竹林。枯落物最大持水深为灌木林>针阔混交林>阔叶林>楠竹林,其最大吸水率为针阔混交林>灌木林>阔叶林>楠竹林。在枯落物持水作用较强的前2h内,其吸水速率最快的为灌木林1.949mm/h,其次为针阔混交林和阔叶林,都为1.031mm/h,最小的为楠竹林为0.809mm/h。研究结果表明,三峡库区缙云山自然保护区不同植被下枯落物持水能力为灌木林大于针阔混交林和阔叶林,楠竹林最小。

Litter water retention characteristic can be obtained after survey and analyze, and study the process of water retention capacity of litter in the 4 typical vegetations (mixed wood, broadleaf forest, bamboo forest and shrub forest). The result show that litter amount is shrub forest > broadleaf forest > mixed wood >bamboo forest. The maximum of water retention depth is shrub forest > mixed wood > broadleaf forest >bamboo forest, and the maximum of water retention rate is mixed wood > shrub forest > broadleaf forest >bamboo forest. In the first 2h of water retention capacity of litter, water absorption rate in shrub forest is 1.949 mm/h,1.031 mm/h in mixed wood and broadleaf forest, and 0.809 mm/h in the bamboo forest. So the result show that the water retention capacity of litter in different vegetations in Jinyun mountain natural protection district in the Three Gorges reservoir areas.