| 亚热带常绿阔叶林降雨中可溶性碳氮动态及其对模拟氮沉降的响应 |
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| 引用本文： | 张萌新,朱琳琳,杨佳,赵阳,徐小牛.亚热带常绿阔叶林降雨中可溶性碳氮动态及其对模拟氮沉降的响应[J].安徽农业大学学报,2014,41(4):624. |
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| 作者姓名： | 张萌新 朱琳琳 杨佳 赵阳 徐小牛 |
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| 作者单位： | 安徽农业大学林学与园林学院,合肥230036;大别山区农林特色产业协同创新中心,合肥230036;安徽农业大学林学与园林学院,合肥230036 |
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| 基金项目： | 国家自然科学基金项目（31370626和30771719）和“973”计划(2010CB950602)共同资助。 |
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| 摘 要： | 通过模拟大气氮沉降，对安徽祁门查湾自然保护区亚热带常绿阔叶林大气降雨及穿透雨进行持续监测，探讨森林降雨中可溶性有机碳、氮动态对大气氮沉降的响应。本试验设置了2个处理即高氮处理和无添加对照。结果表明，降雨中水溶性有机碳(TOC)年平均含量为3.204 mg·L-1，NH4+-N为0.243 mg·L-1，NO3--N为0.408 mg·L-1，可溶性有机氮(DON)为0.754 mg·L-1。经过森林林冠淋洗后，穿透雨中TOC年平均浓度达5.623 mg·L-1，对照林分（5.923 mg·L-1）＞高氮处理（5.322 mg·L-1）；NH4+-N年平均浓度为0.285 mg·L-1，对照（0.273 mg·L-1）＜高氮处理（0.297 mg·L-1）；NO3--N年平均浓度为0.509 mg·L-1，对照（0.523 mg·L-1）＞高氮处理（0.494 mg·L-1）；DON年平均浓度为0.691 mg·L-1，对照（0.665 mg·L-1）＜高氮处理（0.716 mg·L-1）。降雨经过林冠层后，TOC、NH4+-N、NO3--N含量均有明显提高，但DON的含量有所下降；短期的模拟氮沉降对穿透雨可溶性碳和氮没有显著影响。大气降雨中TOC、NH4+-N、NO3--N、DON含量的季节变化明显，主要受控于降雨强度、降雨量，穿透雨的变化可能和树木的生理需求程度有关。
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| 关 键 词： | 大气降雨 穿透雨 可溶性有机碳 氮 亚热带森林 |
Dynamics of dissolved carbon and nitrogen in rainfalls and its response to simulated nitrogen deposition in a subtropical evergreen broad-leaved forest |
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| ZHANG Mengxin,ZHU Linlin,YANG Ji,ZHAO Yang and XU Xiaoniu.Dynamics of dissolved carbon and nitrogen in rainfalls and its response to simulated nitrogen deposition in a subtropical evergreen broad-leaved forest[J].Journal of Anhui Agricultural University,2014,41(4):624. |
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| Authors: | ZHANG Mengxin ZHU Linlin YANG Ji ZHAO Yang and XU Xiaoniu |
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| Institution: | School of Forestry & Landscape Architecture, Anhui Agricultural University, Hefei 230036; Collaborative Innovation Center of Agro-forestry Industry in Dabieshan Area, Hefei 230036,School of Forestry & Landscape Architecture, Anhui Agricultural University, Hefei 230036; Collaborative Innovation Center of Agro-forestry Industry in Dabieshan Area, Hefei 230036,School of Forestry & Landscape Architecture, Anhui Agricultural University, Hefei 230036; Collaborative Innovation Center of Agro-forestry Industry in Dabieshan Area, Hefei 230036,School of Forestry & Landscape Architecture, Anhui Agricultural University, Hefei 230036 and School of Forestry & Landscape Architecture, Anhui Agricultural University, Hefei 230036; Collaborative Innovation Center of Agro-forestry Industry in Dabieshan Area, Hefei 230036 |
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| Abstract: | forest canopy at the experimental site. The seasonal changes of chemical components in rainfalls were mainly controlled by the amount and intensity of rainfalls; however, such changes in the passing-through rainfalls were likely related to physiological nutrient acquisition of trees. |
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