重庆缙云山典型林分林地土壤入渗特性研究

Research on Forest Soil Permeability Capability of Typical Forests in Jinyun Mountain in Chongqing City

通过对三峡库区重庆缙云山4种典型林分（针阔叶混交林。阔叶林．楠竹林和灌木林）林地土壤的入渗特性研究表明。4种典型林分林地土壤的快速度贮水量（即非毛管暂时滞留水）是农地的1．3～2倍，灌木林非毛管贮水量最大（171．27mm）。4种典型林分林地土壤稳渗率的顺序为：灌木林（10．169mm／min）〉楠竹林（0．927mm／min）〉混交林（0．743mm／min）〉阏叶林（0．551mm／min）〉农地（0.253mm／min）。对于林地土壤，Philip入渗公式比Horton公式拟合效果更好。而对于农地土壤，采用Horton公式模拟效果更好，相关系数均在0．94以上。运用入渗模型模拟要优于直接幂函数回归。

The research on the forest soil permeability capability of 4 typical forests （mixed wood,broadleaf forest,bamboo forest and shrub forest）in Jinyun mountain in Chongqing City shows that, the forest soil fast water retaining capacity （temporary non-capillary water capacity） is 1. 3- 2 times arable farmland,and shrub forest have the maximum of noncapillary water capacity（171.27 mm）. The forest soil solid permeability order of 4 typical forests is shrub forest （10. 169 mm/ min）〉 bamboo forest （0. 927 mm/min） 〉 mixed wood （0. 743 mm/min） 〉 broadleaf forest （0. 551 mm/min）〉 arable farmland （0. 253 mm/min）. Philip infiltration model has better analog calculation effects than Horton model to the forest soil, however to arable farmland soil,Horton model is better （R〉0. 94）. In general,infiltration model analog effect is better than directly power function regression.