摘要
通过对色季拉山川滇高山栎林土壤的抗蚀性进行研究,以期为该区生态建设和水土流失治理提供科学理论依据,研究结果表明:川滇高山栎林下不同层次土壤均具有较强的抗蚀性,上层土壤抗蚀能力略高于下层。林内枯落物储量多,水文功能明显。林下土壤有机质含量为32.65～40.06 g/kg。土壤结构良好,大粒径团聚体含量较高,非水稳性团聚体主要以>10 mm、>2～5 mm和≤0.25 mm 3个粒级为主。水稳性团聚体>7 mm粒径的基本上消失,相比于非水稳性团聚体的含量,其余各级团聚体含量均有一定程度的上升。抗蚀性指数K值方面,不同层次土壤抗蚀性指数K值与时间呈明显对数函数关系:y=-a ln(x)+b。
Study on the soil erosion resistance of Quercus aquifolioides in Sejila Mount was conducted to explore scientific and theoretical basis for ecological construction as well as soil and water loss control. The results showed that： The amount of litter in L level was less than that in F layer. The maximum water-holding capacity of L layer was greater than F layer. The modified interception of L layer was greater than F layer. The soil organic matter of the upper was higher than that of the lower. The aggregates of size 〉 7 mm disappeared virtually. The soil erosion resistance index of different levels（ K value ） increased logarithmically with time： y = -a ln（χ） ＋ b.
出处
《林业科技开发》
北大核心
2013年第4期37-41,共5页
China Forestry Science and Technology
基金
西藏科技厅青年基金项目"藏东南小型泥石流生物措施治理关键技术研究"(编号:20111213-A)
国家863计划课题"农业生命信息感知技术与装备"(编号:2011AA100705)
关键词
藏东南
色季拉山
川滇高山栎
抗蚀性
southeast of Tibet
Sejila Mount
Quereus aquifolioides
erosion resistance
