色季拉山云杉林枯落物持水性能研究  

Research on the Water-holding Capacity of Litters in Spruce Forest of Shergyla Mountain

作　　者：万丹[1] 丁晨曦[1] 欧伟 喻武[1] 张博[1] 

机构地区：[1]西藏农牧学院资源与环境学院,西藏林芝860000 [2]重庆市合川区水利工程管理站,重庆401520

出　　处：《安徽农业科学》2010年第23期12910-12912,共3页Journal of Anhui Agricultural Sciences

基　　金：科技部项目(2007-BAC06B06);西藏农牧学院青年基金项目(200908)

摘　　要：[目的]研究森林枯落物对水源涵养的作用。[方法]在色季拉山林分内选择具有代表性的部位设置样方,采集样方内的枯落物,记录枯枝落叶层和半分解层厚度,称量样品的湿重和干重,计算干物质蓄积量,并测定枯落物的持水量和吸水速率。[结果]枯枝落叶层和半分解层单位面积贮水量为56.89和116.89t/hm2。用浸泡法处理5min时,枯落物的吸水速率最大,未分解层和半分解层的吸水速率分别为1956和1896g/(kg.h)。0～10min内半分解层的吸水速率小于未分解层,而10min后则大于未分解层。枯落物未分解层和半分解层的最大持水量分别为89.77和73.51t/hm2,有效拦蓄量分别达62.38和164.06t/hm2。[结论]云杉枯落物具有显著的蓄水作用。[Objective]The purpose was to research the reservation effect of litters in forest on water source.[Method] The representative locations were selected in forest stand of Shergyla Mountain to set up plots.The litters were collected from plots,the thickness of litter and semi-decomposed layers were recorded,the wet and dry weights of samples were weighted,the accumulation amount of dry matter was calculated and the water-holding capacity and water-absorption rate of litters were determined.[Result] The water reservations per unit area of litter and semi-decomposed layers were 56.89 and 116.89 t/hm2.While soaking for 5 min,the water-absorption rate of litters was highest and that of non-decomposed and semi-decomposed layers were 1 956 and 1 896 g/（kg·h） resp.The water-absorption rate of semi-decomposed layer was lower than that of non-decomposed layer in 0-10 min and it was opposite after 10 min.The maximum water-holding capacities of non-decomposed and semi-decomposed layers of litters were 89.77 and 73.51 t/ hm2 resp.and their available interception amounts reached 62.38 and 164.06 t/ hm2 resp.[Conclusion]Litters of spruce possessed significant water-holding effect.

关 键 词：云杉 枯落物 色季拉山 持水性 

分 类 号：S718.55[农业科学—林学]