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当前位置: 首页 > 文章 > 上海市城市河岸带土壤氮矿化作用与活性氮库变化 土壤通报 2015,46 (5) 1196-1201
Position: Home > Articles > Change of Net Nitrogen Mineralization Rate and Soil Labile Nitrogen Pool in Urban Riparian Zone of Shanghai Chinese Journal of Soil Science 2015,46 (5) 1196-1201

上海市城市河岸带土壤氮矿化作用与活性氮库变化

作  者：
邓焕广;张菊;王东启;陈振楼;王倩;蒋磊
单  位：
聊城大学环境与规划学院;华东师范大学资源与环境科学学院
关键词：
城市河岸带;土壤;净矿化速率;活性氮库
摘  要：
为了解上海市城市河岸带土壤氮矿化速率以及活性氮库的变化,在上海市选择了6个典型城市河岸带,自2010年12月至2011年11月每两个月一次采用埋袋法测定了各河岸带0~35 cm深度土壤氮矿化速率和活性氮库的变化。结果表明,上海市城市河岸带0~35 cm深度土壤净矿化速率平均为0.006 mg kg-1 d-1,且具有显著的时空差异性;通过three-way ANOVA和Pearson相关分析发现,土壤深度、月份和区域条件均能对河岸带土壤氮矿化速率产生显著的单一或综合交互影响,净矿化速率与SOC含量呈极显著负相关关系(p<0.01),与土壤中NO3-和NH4+的含量以及温度均呈极显著正相关关系(p<0.01),而与土壤粒径没有显著的相关关系。上海市城市河岸带0~35 cm土壤整体上表现为活性氮库的增加,但在不同的点位和月份上会出现活性氮库亏损的现象。
译  名：
Change of Net Nitrogen Mineralization Rate and Soil Labile Nitrogen Pool in Urban Riparian Zone of Shanghai
作  者：
DENG Huan-guang;ZHANG Ju;WANG Dong-qi;CHEN Zhen-lou;WANG Qian;JIANG Lei;School of Environment and Planning, Liaocheng University;School of Resources and Environmental Science, East China Normal University;
关键词：
Urban riparian zone;;Soil;;Net nitrogen mineralization rate;;Labile nitrogen pool
摘  要：
In order to study the change of soil ne t nitrogen mineralization rates and labile nitrogen pool in urban riparian zone of Shanghai, six typical sampling sites were chosen. Results showed that the net mineralization rates were generally low and showed significant spatial- temporal difference at 0 ~ 35 cm layer in urban riparian zone of Shanghai. The net mineralization rates ranged from- 0.127 to 0.233 mg kg- 1d- 1with an average of 0.006 mg kg- 1d- 1.Net mineralization rates decreased first and then increased with depth at most sites. The net mineralization rates were obviously higher from April to July than from December to March. The results of three- way analysis of variance(ANOVA) suggested that soil net mineralization rates in urban riparian zone were significantly affected by the single and combined factors of site, soil depth and month. Results of Pearson correlation analysis showed that physicochemical properties of soil(SOC, NO3-- N and NH4+- N) and temperature were the main influencing factors in regional difference of net mineralization rates. In general, available nitrogen tended to accumulate in 0 ~ 35 cm depth soil of riparian zone. Except from August to September, changes of labile nitrogen pools increased and then decreased from December to November of next year. There were the highest accumulation of N from June to July and highest loss of N from December to January.

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