天宝岩3种典型森林类型CWD持水能力的比较

The Water Holding Capacity of Coarse Woody Debris in Three Typical Forest Types in Tianbaoyan National Nature Reserve

摘要:

对天宝岩国家级自然保护区3种典型森林类型内粗死木质残体(CWD)的持水量进行研究。结果表明，柳杉(Crytomeria fortunei)林内CWD的持水量最低；不同森林类型各类CWD的水分蓄持能力不同，猴头杜鹃(Rhododendron simiarum)林内以倒木＞枯立木＞树桩，长苞铁杉(Tsuga longibracteata)林和柳杉林内为枯立木>倒木>树桩；CWD有效持水量和自然含水率随CWD腐烂程度增加呈上升趋势。

Abstract:

The natural water moisture and effective water holding capacity of coarse woody debris (CWD) in three typical forest ecosystems in Tianbaoyan National Nature Reserve were studied. The results showed that the water holding capacity of CWD was lowest in the Crytomeria fortunei forest；the water holding capacity was in order as fallen tree＞snags＞stumps in Rhododendron simiarum forest, and snags＞fallen tree＞stumps in Tsuga longibracteata and Crytomeria fortunei forests. The effective water holding capacity of CWD increased with decay class of CWD increment，as well as the natural moisture content of CWD.