滇池湖滨带不同植被类型土壤碳、氮时空分布特征

王邵军; 曹子林; 李小英; 廖周瑜; 胡兵辉; 倪杰

doi:10.3969/j.issn.1000-2006.2013.05.011

王邵军，曹子林，李小英，廖周瑜，胡兵辉，倪杰

南京林业大学学报（自然科学版） ›› 2013, Vol. 37 ›› Issue (05) : 55-59.

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南京林业大学学报（自然科学版） ›› 2013, Vol. 37 ›› Issue (05) : 55-59. DOI: 10.3969/j.issn.1000-2006.2013.05.011

研究论文

滇池湖滨带不同植被类型土壤碳、氮时空分布特征

王邵军，曹子林，李小英，廖周瑜，胡兵辉，倪杰

作者信息 +

Spatiotemporal distributions of soil carbon and nitrogen under the four riparian zones in the Dianchi Lake

WANG Shaojun, CAO Zilin, LI Xiaoying, LIAO Zhouyu, HU Binghui, NI Jie

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摘要

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4 g/kg，2.0 mg/kg) > 池杉林(19.7 g/kg，1.6 mg/kg)＞垂柳林(159 g/kg，0.8 mg/kg)＞樟树林(10.8 g/kg，0.5 mg/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。0~10 cm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≥20～30 cm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。

Abstract

Riparian zone, an important ecological ecotone between lake and terrestrial ecosystem, could effectively reduce and retain nutrient source. This study aimed to explore spatial and temporal distributions of soil organic carbon (SOC) and total nitrogen (TN) under four different riparian zones of Dianchi Lake in Kunming city. The results showed that:(1) Average SOC and TN in four different riparian types were ranked from high to low as Populus yunnanensis (294 g/kg, 2.0 mg/kg)＞Taxodium ascendens (19.7 g/kg, 1.6 mg/kg)＞Salix babylonica (15.9 g/kg, 0.8 mg/kg)＞Cinnamomum camphora (10.8 g/kg, 0.5 mg/kg). (2) Spatiotemporal distributions of SOC and TN were different in four different riparian zones. No matter in the drought season or in the wet season, SOC and TN in the Populus yunnanensis, Taxodium ascendens and Cinnamomum camphora forested lands dropped along the soil layers deepen while there was an increase trend of SOC and TN in the Salix babylonica forested land. The influences of riparian vegetation types on soil SOC and TN were mainly in soil surface because SOC and TN in the Populus yunnanensis site were significantly higher than in the other three vegetation types in 0-10 cm but not in ≥20-30 cm soil layer. (3) TN in the riparian vegetation types had significantly positive correlation with SOC and soil water content. Therefore SOC and soil moisture were the important factors affecting the dynamics of soil nitrogen in the riparian zones of Dianchi Lake.

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王邵军，曹子林，李小英，廖周瑜，胡兵辉，倪杰. 滇池湖滨带不同植被类型土壤碳、氮时空分布特征[J]. 南京林业大学学报（自然科学版）. 2013, 37(05): 55-59 https://doi.org/10.3969/j.issn.1000-2006.2013.05.011

WANG Shaojun, CAO Zilin, LI Xiaoying, LIAO Zhouyu, HU Binghui, NI Jie. Spatiotemporal distributions of soil carbon and nitrogen under the four riparian zones in the Dianchi Lake[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2013, 37(05): 55-59 https://doi.org/10.3969/j.issn.1000-2006.2013.05.011

中图分类号： S181 S714

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基金

收稿日期：2012-12-10修回日期：2013-04-02 基金项目：西南林业大学重点科研基金项目（110923）；西南林业大学科研启动项目（111206）；国家重点基础研究发展计划（2012CB416904）第一作者：王邵军,副教授,博士。 Email： shaojunwang2009@163.com。引文格式：王邵军，曹子林，李小英，等. 滇池湖滨带不同植被类型土壤碳、氮时空分布特征[J]. 南京林业大学学报：自然科学版，2013，37（5）：55-59.