云南高原典型林分林下枯落物持水特征研究  

Study on water-holding capacity and characteristics of forest litter in plateau region of Yunnan

作　　者：周祥[1] 赵一鹤[2] 张洪江[1] 王雄宾 

机构地区：[1]水土保持与荒漠化防治教育部重点实验室//北京林业大学水土保持学院,北京100083 [2]中国林业科学研究院资源昆虫研究所,云南昆明650224 [3]河北省水利科学研究院,河北石家庄050051

出　　处：《生态环境学报》2011年第2期248-252,共5页Ecology and Environmental Sciences

基　　金：国家自然科学基金-云南联合基金项目(U0933601)

摘　　要：森林枯落物具有重要生态水文功能,通过实地调查与实验分析,对云南高原湖泊纳帕海流域3种典型林分枯落物储量、持水量和持水过程进行了研究。结果表明:高山松(pinus densata)林下枯落物储量最大,白桦林(Betula platyphylla Suk.)次之,川滇高山栎(Quercus aquifolioides)灌丛最小,林下枯落物储量最大持水量和有效拦蓄量大小排序表现出和枯落物储量相同的顺序;不论是储量、最大持水量还是有效拦蓄量,各林分枯落物都表现出半分层大于未分解层。3种林下枯落物在0～2 h内吸水较快,在10 h后吸水速明显减缓,用对数方程对3种林下枯落物未分解层和半分解层持水量与浸水时间进行拟合,用幂函数方程对吸水速率与浸水时间进行拟合,结果显示相关系数都较高。To disclosure the eco-hydrological function of litter of Napahai basin in Yunnan province,the litter amount and its water holding characteristic parameters,such as the water holding capacity,water absorption rate and the modified interception amount under 3 typical forest plantations were studied.The results show that the litter storage of pinus densata was the largest,followed by Betula platyphylla,and Quercus aquifolioides,the order of water holding capacity and modified interception of litter was the same with litter storage.The value of litter storage,water holding capacity and modified interception of half-decomposed litter was larger than that of undecomposed litter.The water absorption rates of the 3 kind of litters were faster within the first 2 hours,slowing down obviously around 10 hours.Water holding capacity of 3 undecomposed litters and half-decomposed litters increased logarithmically over time immersed in water,as the equation w=a.lnt＋b,the relation formula of the water absorption rates and immersion time was w=a.tb.

关 键 词：云南高原 枯落物 持水量 吸水速率 

分 类 号：Q948[生物学—植物学]