Pedosphere 16(5): 596--601, 2006
ISSN 1002-0160/CN 32-1315/P
©2006 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Preliminary response of soil fauna to simulated N deposition in three typical subtropical forests |
XU Guo-Liang1,2 , MO Jiang-Ming1, ZHOU Guo-Yi1 and FU Sheng-Lei1 |
1 Institute of Ecology, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650 (China). E-mail: xugl@scbg.ac.cn;
2 Graduate School of the Chinese Academy of Sciences, Beijing 100039 (China) |
| ABSTRACT |
| A field-scale experiment arranged in a complete randomized block design with three N addition treatments including a control (no addition of N), a low N (5 g m-2 year-1), and a medium N (10 g m-2 year-1) was performed in each of the three typical forests, a pine (Pinus massoniana Lamb.) forest (PF), a pine-broadleaf mixed forest (MF) and a mature monsoon evergreen broadleaf forest (MEBF), of the Dinghushan Biosphere Reserve in subtropical China to study the response of soil fauna community to additions of N. Higher NH4+ and N3- concentrations and a lower soil pH occurred in the medium N treatment of MEBF, whereas the N3- concentration was the lowest in PF after the additions of N. The response of the density, group abundance and diversity index of soil fauna to addition of N varied with the forest type, and all these variables decreased with increasing N under MEBF but the trend was opposite under PF. The N treatments had no significant effects on these variables under MF. Compared with the control plots, the medium N treatment had significant negative effect on soil fauna under MEBF. The group abundance of soil fauna increased significantly with additions of higher N rates under PF. These results suggested that the response of soil fauna to N deposition varied with the forest type and N deposition rate, and soil N status is one of the important factors affecting the response of soil fauna to N deposition. |
| Key Words: Dinghushan Biosphere Reserve, N deposition, soil fauna, subtropical China |
| Citation: Xu, G. L., Mo, J. M., Zhou, G. Y. and Fu, S. L. 2006. Preliminary response of soil fauna to simulated N deposition in three typical subtropical forests. Pedosphere. 16(5): 596-601. |
|
View Full Text
|
|
|
|
