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| Response of soil fauna to simulated nitrogen deposition： A nursery experiment in subtropical China | |
| 作者姓名： | XU Guo-liang MO Jiang-ming FU Sheng-lei PER Gundersen ZHOU Guo-yi XUE Jing-Hua |
| 作者单位： | XU Guo-liang（Institute of Ecology, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China;Graduate School of the Chinese Academy of Sciences, Beijing 100039, China） ; MO Jiang-ming（Institute of Ecology, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China） ; FU Sheng-lei（Institute of Ecology, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China） ; PER Gundersen（Danish Centre for Forest, Landscape and Planning, KVL, Hoersholm Kongevej 11, DK-2970 Hoersholm Denmark） ; ZHOU Guo-yi（Institute of Ecology, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China） ; XUE Jing-Hua（Institute of Ecology, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China） ; |
| 摘 要： | We studied the responses of soil fauna to a simulated nitrogen deposition in nursery experimental plots in Subtropical China. Dissolved NH4NO3 was applied to the soil by spraying twice per month for 16 months, starting January 2003 with treatments of 0, 5, 10, 15 and 30 gN/(m2·a). Soil fauna was sampled after 6, 9, 13 and 16 months of treatment in three soil depths (0-5 cm, 5-10 cm, 10-15 cm). Soil available N increased in correspondence with the increasing N treatment, whereas soil pH decreased. Bacterial and fungal densities were elevated by the N treatment. Soil fauna increased in the lower nitrogen treatments but decreased in the higher N treatments, which might indicate that there was a threshold around 10 gN/(m2·a) for the stimulating effects of N addition. The N effects were dependent on the soil depth and sampling time. The data also suggested that the effects of the different N treatments were related to the level of N saturation, especially the concentration of NO3- in the soil. |
| 关 键 词： | 中国 亚热带地区 土壤动物群落 模拟氮沉积 响应 苗圃实验 |
| 收稿时间： | 2006-05-02 |
| 修稿时间： | 2006-12-25 |
Response of soil fauna to simulated nitrogen deposition: A nursery experiment in subtropical China |
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| XU Guo-liang,MO Jiang-ming,FU Sheng-lei,PER Gundersen,ZHOU Guo-yi,XUE Jing-Hua.Response of soil fauna to simulated nitrogen deposition: A nursery experiment in subtropical China[J].Journal of Environmental Sciences,2007,19(5):603-609. | |
| Authors: | XU Guo-liang MO Jiang-ming FU Sheng-lei PER Gundersen ZHOU Guo-yi and XUE Jing-Hua |
| Institution: | 1. Institute of Ecology, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China;Graduate School of the Chinese Academy of Sciences, Beijing 100039, China 2. Institute of Ecology, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China 3. Danish Centre for Forest, Landscape and Planning, KVL, Hoersholm Kongevej 11, DK-2970 Hoersholm Denmark |
| Abstract: | We studied the responses of soil fauna to a simulated nitrogen deposition in nursery experimental plots in Subtropical China. Dissolved NH4NO3 was applied to the soil by spraying twice per month for 16 months, starting January 2003 with treatments of 0, 5, 10, 15 and 30 gN/(m2·a). Soil fauna was sampled after 6, 9, 13 and 16 months of treatment in three soil depths (0-5 cm, 5-10 cm, 10-15 cm). Soil available N increased in correspondence with the increasing N treatment, whereas soil pH decreased. Bacterial and fungal densities were elevated by the N treatment. Soil fauna increased in the lower nitrogen treatments but decreased in the higher N treatments, which might indicate that there was a threshold around 10 gN/(m2·a) for the stimulating effects of N addition. The N effects were dependent on the soil depth and sampling time. The data also suggested that the effects of the different N treatments were related to the level of N saturation, especially the concentration of NO3- in the soil. |
| Keywords: | soil fauna N deposition response Subtropical China nitrogen deposition simulated soil fauna Response Subtropical China especially concentration data different related level saturation dependent soil depth sampling time effects addition threshold lower Bacterial |
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