| 缙云山3种典型森林降雨过程及其氮素输入 |
| 摘要点击 2155 全文点击 1085 投稿时间：2013-07-12 修订日期：2013-09-12 |
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| 中文关键词 常绿阔叶林 毛竹林 针阔混交林 穿透雨 树干径流 氮输入量 |
| 英文关键词 evergreen broad-leaved forest(EBF) bamboo forest(BF) mixed conifer and broadleaved forest (MF) throughfall stemflow nitrogen input |
| 作者 | 单位 | E-mail | | 孙素琪 | 北京林业大学水土保持学院, 水土保持与荒漠化防治教育部重点实验室, 北京 100083 | 734169641@qq.com | | 王玉杰 | 北京林业大学水土保持学院, 水土保持与荒漠化防治教育部重点实验室, 北京 100083 | wyujie@bjfu.edu.cn | | 王云琦 | 北京林业大学水土保持学院, 水土保持与荒漠化防治教育部重点实验室, 北京 100083 | | | 张会兰 | 北京林业大学水土保持学院, 水土保持与荒漠化防治教育部重点实验室, 北京 100083 | | | 于雷 | 北京林业大学水土保持学院, 水土保持与荒漠化防治教育部重点实验室, 北京 100083 | | | 刘婕 | 北京林业大学水土保持学院, 水土保持与荒漠化防治教育部重点实验室, 北京 100083
北京良乡蓝鑫水利工程设计所, 北京 102488 | |
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| 中文摘要 |
| 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NO3-和NH4+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）. |
| 英文摘要 |
| Evergreen broad-leaved forest(EBF), bamboo forest(BF) and mixed conifer and broadleaved forest(MF) were selected as objects of study on Jinyun Mountain from May to October 2012. The main contents were to analyze the rainfall process and nitrogen input of atmospheric rainfall, throughfall and stemflow. The results showed that: ①During the research period, the total precipitation was 564.88 mm, and throughfall of EBF, BF and MF were 74.0%, 85.0% and 71.6% of rainfall, respectively, and stemflow were EBF(1.9%), BF(10.3%) and MF(1.6%), respectively. The relationship between throughfall, stemflow and atmospheric rainfall could be described by a significant linear equation (P<0.05), and both throughfall rate and stemflow rate had an obvious logarithmic function relationship with atmospheric rainfall (P<0.05). ② The concentration of NO3- and NH4+ of throughfall and stemflow were higher than those of atmospheric rainfall, of which the three typical forests ranked as MF>EBF>BF. The total inorganic nitrogen input of throughfall and stemflow were EBF(14.93kg·hm-2), BF(15.31kg·hm-2) and MF(18.93kg·hm-2), respectively. ③ There was a significant linear relationship between inorganic nitrogen input and throughfall, stemflow for three typical forest stands (P<0.05). |
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