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OALib Journal期刊
ISSN: 2333-9721
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滇池湖滨带不同植被类型土壤碳、氮时空分布特征
DOI: 10.3969/j.issn.1000-2006.2013.05.011, PP. 55-59
Keywords: 湖滨带,土壤氮,土壤有机碳,滇池
Abstract:
土壤碳、氮循环是反映湖滨带对氮、磷污染物吸收与固定生态学过程的重要因素，笔者对滇池湖滨带不同植被类型土壤碳、氮含量及其时空变化进行了研究。结果表明：（1）不同植被类型平均土壤有机碳和全氮含量由高到低依次为杨树林(29？4g/kg，2.0mg/kg)>池杉林(19.7g/kg，1.6mg/kg)＞垂柳林(15？9g/kg，0.8mg/kg)＞樟树林(10.8g/kg，0.5mg/kg)。（2）无论在干旱还是湿润季节，杨树林、池杉林和樟树林有机碳含量和土壤全氮沿土层加深均呈下降趋势,而垂柳林则呈现增大趋势。0~10cm土层，杨树林土壤有机碳和全氮含量显著高于其他植被类型，而在≥20～30cm土层样地之间差异性不显著，说明植被类型对土壤有机碳和全氮的影响主要发生在土壤表层。（3）不同植被类型土壤全氮与土壤有机碳、土壤含水量显著正相关，表明土壤有机碳与土壤湿度是影响土壤氮时空格局的重要因素。
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