| 崇明岛不同类型河岸带土壤碳氮分布特征简 |
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| 引用本文： | 王智,陈刚亮,李建华.崇明岛不同类型河岸带土壤碳氮分布特征简[J].安徽农业科学,2013(22):9266-9269. |
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| 作者姓名： | 王智 陈刚亮 李建华 |
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| 作者单位： | 同济大学环境科学与工程学院,长江水环境教育部重点实验室,上海200092 |
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| 基金项目： | 国家科技支撑计划（2010BAK69B16-1-3）. |
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| 摘 要： | 研究了崇明岛4种不同类型河岸带土壤有机碳、氮素含量及其垂直分布特征,结果表明土壤有机碳和全氮含量的变化范围分别为3.13～ 21.34和0.40 ～ 1.97 g/kg.与参考断面相比,林地、灌木林地和草地河岸带土壤有机碳和全氮含量随土壤深度增加而降低,且垂直差异性明显大于菜地河岸带和参考断面.菜地河岸带土壤有机碳含量呈先上升后下降的趋势,最高值出现在10 ～ 20 cm土层,其有机碳和全氮含量的垂直差异性较小.有机碳与全氮呈显著正相关（P＜0.01）,与铵态氮和硝态氮呈显著正相关（P＜0.05）,表明有机质的分解是河岸带土壤氮素的重要来源.
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| 关 键 词： | 崇明岛 河岸带 土壤有机碳 土壤全氮 分布特征 |
Distribution Characteristics of Soil Carbon and Nitrogen in Different Riparian Zones in Chongming Island |
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| Institution: | WANG Zhi et al ( Key Laboratory of the Yangtze River Water Environment of Ministry of Education, College of Environment Science and Engineering, Tongji University, Shanghai 200092) |
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| Abstract: | This research focused on studying the contents and vertical distribution characteristics of soil organic carbon and total nitrogen in four different types of riparian zones in Chongming Island. Results showed that the content ranges of soil organic carbon and total nitrogen were 3.13 - 21.34 g/kg and 0.40 - 1.97 g/kg respectively. Compared with the natural reference sections, the contents of soil organic carbon and total nitrogen of forest, shrub and grassland decreased with the increase of soil depth. Meanwhile, the vertical variability of them was signifi- cantly greater than that of the farming riparian zones and reference sections. The contents of soil organic carbon in farming riparian zones in- creased first and then decreased, and the maximum value appeared in 10 -20 cm soil layer. The organic carbon and total nitrogen contents of the vertical difference were smooth. It was found that the contents of organic carbon and total nitrogen were extremely significant positive corre- lation （P 〈 0.01 ）, and ammonium nitrogen and nitrate was significantly positively related （P 〈 0.05 ） based on the correlation analysis. It is indicated that decomposition of organic matters was major source of nitrogen in soil of riparian zones. |
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| Keywords: | Chongming Island Riparian zone Soil organic carbon Soil total nitrogen Distribution characteristics |
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