山涧口流域2种林分降雨及再分配特征  

Rainfall and Redistribution Characteristics of Two kinds of Stands in Shanjiankou Basin

作　　者：李联地 左万星 忻富宁 任启文[1] 尤海舟[1] 毕君[1] LI Liandi;ZUO Wanxing;XIN Funing;REN Qiwen;YOU Haizhou;BI Jun(Hebei Xiaowutaishan Forest Ecosystem Research Station ,Hebei Academy of Forestry Science ,Shijiazhuang 050061, Hebei ,China;Hebei xiaowutaishan national nature reserve administration,Yuxian 075700 ,Hebei ,China)

机构地区：[1]河北小五台山森林生态系统定位研究站河北省林业科学研究院,河北石家庄050061 [2]河北省小五台自然保护区管理局,河北蔚县075700

出　　处：《福建林业科技》2018年第4期5-10,共6页Journal of Fujian Forestry Science and Technology

基　　金：林业科技创新平台运行补助项目(冀北生态公益林良种选引及优化经营技术研究;2017-LYPT-DW-004)

摘　　要：为分析山涧口流域白桦林和落叶松人工林降雨的再分配特征,针对林分的降雨、穿透雨、树干径流、枯落物渗透水、坡面径流5个方面,从pH值、HCO_3^-、Ca^(2+)、Mg^(2+)、Zn^(2+)、Mn^(2+)、Fe^(2+)7种化学指标进行测定与分析。结果表明:(1)与降雨相比,落叶松林在降雨再分配过程中pH值与Mg^(2+)含量下降; Ca^(2+)、Mn^(2+)含量升高; Zn^(2+)含量在穿透雨及坡面径流中下降,其它过程升高; Fe^(2+)含量在穿透雨及树干径流中下降,其它过程升高; HCO_3^-含量在穿透雨中升高,其它过程下降。(2)比较白桦与落叶松2种林分的水化学特征可知,在各个分配过程中2种林分对于测定物质有不同的影响,并且数量改变也存在明显的差异,其中差异最大的是HCO_3^-。(3)落叶松土壤流失的营养物质种类及数量多于白桦林,水源涵养功能低于白桦林,从发挥生态功能角度出发白桦林优于落叶松林。In order to analyze the characteristics of rainfall redistribution in Birch Forest and Larch Plantation in Shanjiankou Basin, the water samples of rainfall,through-fall,stemf-low,litter-through and runoff 5 processes in two kinds of stands,from pH value, HCO3-,Ca^2+,Mg^2+,Zn^2+,Mn^2+ and Fe^2+ 7 kinds of chemical indicators were determined and analysed.The results showed that:(1) compared with rainfall,in Larch Plantation pH value and the concentration of Mg^2+ were falled,the concentrations of Ca^2+ and Mn^2+ were increased in redistribution processes of rainfall;the concentration of Zn^2+ was falled in through-fall and runoff,increased in other processes;the concentration of Fe^2+ was falled in through-fall and stem-flow,increased in other processes;the concentration of HCO3-was increased in through-fall and falled in other processes.(2)Comparison of the hydro-chemical characteristics of Birch forest and Larch plantation,two kinds of stands had different effects on the determination of material in each distribution processes and there was a significant difference in the quantity of changes.The large difference was the HCO3^-.(3)The nutritive materials'species and quantity of soil loss in Larch Plantation were higher than that of Birch Forest,water conservation function was lower than Birch Forest,it can be seen that Birch Forest was superior to Larch Plantation from the way of giving play to the ecological function.

关 键 词：山涧口流域 林分 降雨 再分配 

分 类 号：S715-3[农业科学—林学]