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选取重庆缙云山的常绿阔叶林、毛竹林和针阔混交林为研究对象,于2012年5~10月对大气降水、穿透雨和树干径流等降水过程及其氮素输入进行研究.结果表明:①研究期间总降雨量564.88 mm,常绿阔叶林、毛竹林和针阔混交林的穿透雨量占总降雨量的比例分别为74.0%、85.0%和71.6%,且树干径流量所占比例分别为1.9%、10.3%和1.6%;3种林分的穿透雨量、树干径流量与林外降雨量之间均呈显著的线性关系(P<0.05),且穿透雨率、树干径流率与林外降雨量之间都呈对数关系(P<0.05).②与大气降水相比,穿透雨和树干径流的NO-3和NH+4浓度要高,且3种林分的大小关系为针阔混交林>常绿阔叶林>毛竹林;穿透雨和树干径流的总无机氮输入量(以N计)分别为针阔混交林(18.93 kg·hm-2)、常绿阔叶林(14.93 kg·hm-2)和毛竹林(15.31 kg·hm-2).③3种林分的无机氮输入量与穿透雨量、树干径流量之间均呈显著的线性关系(P<0.05).
Taking the evergreen broad-leaved forest, the bamboo forest and the coniferous and broad-leaved mixed forest in Jinyun Mountain of Chongqing as the research object, the precipitation process, rainfall and trunk runoff precipitation and nitrogen input from May to October 2012 were studied. The results showed that: (1) The total rainfall during the study period was 564.88 mm, the percentage of the total rainfall of the evergreen broad-leaved forest, the mixed forest of bamboo forest and coniferous broadleaved forest was 74.0%, 85.0% and 71.6% respectively, Accounting for 1.9%, 10.3% and 1.6% of the total rainfall respectively. There was a significant linear relationship (P <0.05) between the runoff and trunk runoff of the three stands, There was a logarithmic relationship between the runoff rate of the trunk and rainfall outside the forest (P <0.05) .② Compared with the precipitation, the concentrations of NO-3 and NH + 4 penetrating rain and trunk runoff were higher, The relationship between the size and the size of the forest was coniferous-broadleaved mixed forest> evergreen broad-leaved forest> moso bamboo forest. The total input of inorganic nitrogen (in N) of penetrating rain and trunk runoff were coniferous-broad mixed forest (18.93 kg · hm-2) , Evergreen broad-leaved forest (14.93 kg · hm-2) and Moso bamboo forest (15.31 kg · hm-2) .③The input of inorganic nitrogen and the penetration rainfall and the trunk runoff of the three kinds of stands were significantly Relationship (P <0.05).