| 上海市林地土壤有机碳分布特征及其与土壤理化性质的关系 |
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| 引用本文： | 张青青,张桂莲,伍海兵,仲启铖,何小丽,陈平,朱清,徐冰,梁晶.上海市林地土壤有机碳分布特征及其与土壤理化性质的关系[J].浙江农林大学学报,2019,36(6):1087-1095. |
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| 作者姓名： | 张青青 张桂莲 伍海兵 仲启铖 何小丽 陈平 朱清 徐冰 梁晶 |
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| 作者单位： | 1.上海市园林科学规划研究院, 上海 2002322.上海城市困难立地绿化工程技术研究中心, 上海 200232 |
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| 基金项目： | "十三五"国家重点研发计划项目2017YFC0505706国家自然科学基金资助项目31800411上海市科学技术委员会科技专项17DZ1202801 |
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| 摘 要： | 土壤有机碳影响着全球气候生态系统的平衡。城市林地作为城市生态系统的重要组成部分，其碳含量和密度的高低是评价城市生态环境建设成功与否的关键。以上海市7种典型林地樟树Cinnamomum camphora林、阔叶混交林、其他软阔林、其他硬阔林、针阔混交林、水杉Metasequoia glyptostroboides林、经济林为对象，分析了不同林地、不同土层（0~10，10~30，30~100 cm）的有机碳质量分数和密度分布特征，并采用Pearson相关性分析方法和逐步剔除回归法探讨了有机碳质量分数与土壤基本理化性质的关系。结果表明:①上海市林地0~100 cm土壤有机碳平均质量分数从大到小依次为:其他软阔林、樟树林、经济林、阔叶混交林、水杉林、针阔混交林、其他硬阔林。各林地土壤有机碳质量分数在0~10和10~30 cm存在显著差异（P < 0.05）。除经济林，其余林地土壤有机碳质量分数在垂直方向上均表现为逐渐降低。②上海市林地0~100 cm土壤有机碳密度从大到小依次为:樟树林、其他软阔林、经济林、阔叶混交林、针阔混交林、水杉林、其他硬阔林。上海市林地0~30 cm土层有机碳密度对0~100 cm土层的贡献率较低。③上海市7种林地土壤有机碳质量分数与全氮和碱解氮呈极显著正相关（P < 0.01），与电导率、全磷的相关性不显著。樟树林、其他软阔林、其他硬阔林、水杉林的土壤有机碳质量分数与容重显著负相关（P < 0.05）。阔叶混交林、其他软阔林、其他硬阔林的土壤有机碳质量分数与pH值呈显著负相关（P < 0.05）；樟树林、水杉林的土壤有机碳质量分数与速效磷显著正相关（P < 0.05）。除阔叶混交林、水杉林的土壤有机碳质量分数的主要影响因子为全氮，樟树林、其他软阔林、其他硬阔林和针阔混交林的土壤有机碳质量分数变化的主控因子为碱解氮。
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| 关 键 词： | 森林土壤学 城市林地 有机碳 有机碳密度 容重 全氮 |
| 收稿时间： | 2018-12-13 |
Soil organic carbon distribution and its relationship with soil physicochemical properties in different forest types of Shanghai City |
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| ZHANG Qingqing,ZHANG Guilian,WU Haibing,ZHONG Qicheng,HE Xiaoli,CHEN Ping,ZHU Qing,XU Bing,LIANG Jing.Soil organic carbon distribution and its relationship with soil physicochemical properties in different forest types of Shanghai City[J].Journal of Zhejiang A&F University,2019,36(6):1087-1095. |
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| Authors: | ZHANG Qingqing ZHANG Guilian WU Haibing ZHONG Qicheng HE Xiaoli CHEN Ping ZHU Qing XU Bing LIANG Jing |
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| Institution: | 1.Shanghai Academy of Landscape Architecture Science and Planning, Shanghai 200232, China2.Shanghai Engineering Research Center of Landscaping on Challenging Urban Sites, Shanghai 200232, China |
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| Abstract: | Soil organic carbon (SOC) affects the balance of the global climate ecosystem and is of great importance in guiding global climate change. To understand the effect of urban forest types on soil carbon content and density on the urban ecosystem, samples of soil profiles under seven types of forestry were collected from Shanghai City. The distribution of organic carbon content and density in different forests and different soil layers (0-10, 10-30, and 30-100 cm) were analyzed, and the relationships between SOC content and soil physicochemical properties by the Pearson Correlation analysis and stepwise elimination regression method was discussed. Results showed that:The average SOC content of 1 m-depth soil in Shanghai forests showed that other soft broadleaf forest > Cinnamomum camphora forest > economic forest > broadleaf mixed forest > Metasequoia glyptostroboides forest > coniferous and broadleaf mixed forest>other hard broadleaf forest, while the organic carbon density of 1 m-depth soil in Shanghai forests showed Cinnamomum camphora forest > other soft broadleaf forest > economic forest > broadleaf mixed forest > coniferous and broadleaf mixed forest > Metasequoia glyptostroboides forest>other hard broadleaf forest. SOC content in the 0-10 cm layer was significantly different from the 10-30 cm layer depending on vegetation types (P < 0.05). The average SOC content and density per 10 cm layer thickness gradually decreased in the profile, except for the economic forest. The main controlling factor for the change of SOC content in the camphor forest, other soft broadleaf forest, other hard broadleaf forest, and coniferous broadleaf mixed forest was hydrolyzed nitrogen. The main influencing factor of SOC content in the broadleaf mixed forest, and Metasequoia glyptostroboides forest was total nitrogen. |
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