四川省洪雅县3种林分的土壤持水与入渗特性

根据2003年7月到2006年12月的实测数据,对四川洪雅县退耕还林还草工程中的3种林分(光皮桦林、苦竹林和撑绿杂交竹林,农耕地作为对照)进行研究。结果表明,3种典型林分森林土壤的非毛管持水量均大于农地;除撑绿杂交竹竹林外,各林分土壤的有效蓄水容量为农地的1.1~2.1倍;3种林分森林土壤持水量、初渗率和稳渗率的顺序为:苦竹林>光皮桦林>农地对照>撑绿杂交竹林;从土壤持水性能和入渗性能看,苦竹的水文功能好于其他林分土壤,而光皮桦林次之,撑绿杂交竹林差。

Soil Water Retaining Capacity and Infiltration Property of Three Forest Stands in Hongya County of Sichuan Province

Based on the real-time monitoring data in July 2003 to December 2006,there forest stands(Betula luminifera forests,Arundinaria amara forests and Bambusa pervariabilis×Dendrocalamopsis oldhami forests,farmland as comparison) in Hongya county of Sichuan province were studied.The results showed that the non-capillary water retaining capacity was higher than that of arable farmland soil.And the effective water storage of the soil was 1.1～2.1 times of that of the farmland except for the soil of Bambusa pervariabilis×Dendrocalamopsis oldhami forests.For the three forest stands,the soil water retaining capacities,the elementary infiltration rates and the stable infiltration rates of the soil were ranked as follows: Arundinaria amara forests>Betula luminifera forests>farmland>Bambusa pervariabilis×Dendrocalamopsis oldhami forests.In general,the soil of the Arundinaria amara forests had the best hydrological function from the aspect of soil water retaining capacity and infiltration property.The hydrological function of the Betula luminifera forests were middle,while that of the Bambusa pervariabilis×Dendrocalamopsis oldhami forests was worse.