桤木、马褂木在鄂西山区水土保持建设中的应用

摘要：为了增加鄂西山区水土保持林树种，促进区域林业项目建设和林种结构调整，本文选择桤木、马褂木、多土树种营建水土保持试验林，以生长量、郁闭度、根系生长量、地表枯枝落叶量等因子进行对比分析。结果表明：桤木、马褂木适应鄂西山区造林环境，成活率高，生长较快，林分郁闭快，根系发达，地表枯枝落叶量大，有良好水土保持和水源涵养能力；抚育管理难和成本低，经济效益较显著，能在鄂西山区水土保持建设中发挥示范作用。

Application of Alnus cremastogyne and Liriodendron chinense in Soil and Water Conservation Construction in Western Hubei Mountainous Area

In order to increase tree species of soil and water conservation forest in western Hubei moun- tainous area, and play a positive exemplary role in promoting the forestry projects and tree species struc- ture adjustment in the region. Alnus crernastogyne and Liriodendron chinense had been used the soil and water conservation forest, and its growth rate, canopy density, root growth, surface litter amount had been compared with the native tree species in same stand conditions. The results showed that those two species adopted in western Hubei mountainous area afforestation environment, and then have high surviv- al rate, fast growth, fast forest closure canopy, well root system and soil conservation , large amount of surface litter with good soil and water conservation; meanwhile, difficult tending management and low cost,and it play an exemplary role in water and soil conservation forest in western Hubei mountainous area.