不同林龄白桦次生林降雨水化学特征研究  

Study on Precipitation Hydro-chemical Characteristic of Different Stages of Betula platyphylla Secondary Forest

作　　者：李文影[1] 满秀玲[1] 张阳武[1,2] 

机构地区：[1]东北林业大学,黑龙江哈尔滨150040 [2]国家林业局调查规化设计院,北京100714

出　　处：《水土保持学报》2009年第5期123-127,共5页Journal of Soil and Water Conservation

基　　金：国家自然科学基金(30771713)

摘　　要：通过对不同林龄白桦次生林林外降雨、穿透雨、树干茎流和枯透水中的Cl-,NO3--N,Na+,K+,Ca2+,Mg2+等进行测定,以研究4个林龄之间降水化学性质的差异。结果表明:林外降雨中Ca2+的含量最高,Na+含量最低,养分元素平均含量(以mg/L计)排列顺序为:Ca2+>Cl->K+>NO3--N>Mg2+>Na+,各元素在林外降雨中的季节变化较大,变化幅度最小的是Cl-;穿透雨中NO3--N,Ca2+含量在25 a白桦次生林中最低,Cl-,Mg2+含量在38 a中最低,而Na+,K+含量在56 a中最低;树干茎流中Cl-,NO3--N,K+含量在38 a白桦次生林中最低,而Na+,Ca2+,Mg2+含量在56 a中最低;枯透水中Cl-,NO3--N,Na+,K+含量在25 a白桦次生林中最低,Mg2+含量在38 a中最低,而Ca2+含量在56 a中最低。This paper measured the precipitation,throughfall,stemflow and litter water in the Cl-,NH＋4-N,Na＋,NO-3-N,TN,K＋,Ca2＋,Mg2＋ of different stages of Betula platyphylla secondary forest.The paper studied the different properties of hydro-chemical between four different stages of Betula platyphylla secondary forest.The results showed： In precipitation the highest concentration was for Ca2＋and the lowest concentration was for Na＋.The average concentration of elements（in mg/L total） for the order Ca2＋〉Cl-〉K＋〉NO3--N〉Mg2＋〉Na＋,the amount of each element was very various in terms of seasons alternate and in which the change of Cl-was the smallest.NO-3-N and Ca2＋ of throughfall was the lowest content in 25 year-old of Betula platyphylla secondary forest,Cl-and Mg2＋of throughfall was the lowest concentration in38 year-old of Betula platyphylla secondary forest,Na＋,K＋,Mg2＋of throughfall was the lowest concentration in 56 year-old of Betula platyphylla secondary forest.Cl-,NO-3-N,K＋of stemflow was the lowest concentration in 38 year-old of Betula platyphylla secondary forest,Na＋,Ca2＋and Mg2＋of stemflow was the lowest concentration in 56 year-old of Betula platyphylla secondary forest.Cl-,NH＋4-N,Na＋and K＋ of litter wate was the lowest concentration in 25 year-old of Betula platyphylla secondary forest,Mg2＋,Mn of litter wate was the lowest concentration in 38 year-old of Betula platyphylla secondary forest.Ca2＋of litter water was the lowest concentration in 56 year-old of Betula platyphylla secondary forest.

关 键 词：不同林龄 穿透雨 树干茎流 枯透水 水化学 

分 类 号：S715.2[农业科学—林学]