Pedosphere 22(5): 698--706, 2012
ISSN 1002-0160/CN 32-1315/P
©2012 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Responses of Soil Acid Phosphomonoesterase Activity to Simulated Nitrogen Deposition in Three Forests of Subtropical China |
| HUANG Wen-Juan1,2, ZHANG De-Qiang1, LI Yue-Lin1, LU Xian-Kai1, ZHANG Wei1, HUANG Juan1, D.OTIENO1,3, Z. H. XU4, LIU Ju-Xiu1, LIU Shi-Zhong1, CHU Guo-Wei1 |
| 1.Key laboratory of Vegetation Restoration and Management of Degrade Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650 (China);2.Graduate University of Chinese Academy of Sciences, Beijing 100049 (China);3.Department of Plant Ecology, University of Bayreuth, Bayreuth 95440 (Germany);4.Environmental Futures Centre&School of Biomolecular and Physical Sciences, Griffth University, Nathan QLD 4111 (Australia) |
| ABSTRACT |
| Soil acid phosphomonoesterase activity(APA)plays a vital role in controlling phosphorus(P)cycling and reflecting the current degree of P limitation.Responses of soil APA to elevating nitrogen(N)deposition are important because of their potential applications in addressing the relationship between N and P in forest ecosystems.A study of responses of soil APA to simulated N deposition was conducted in three succession forests of subtropical China.The three forests include a Masson pine(Pinus massoniana)forest (MPF)-pioneer community,a coniferous and broad-leaved mixed forest(MF)-transition community and a monsoon evergreen broad-leaved forest(MEBF)-climax community.Four N treatments were designed for MEBF:control(without N added),low-N(50 kg N ha-1 year-1),and medium-N(100 kg N ha-1 year-1)and high-N(150 kg N ha-1 year-1),and only three N treatments(i.e.,control, low-N,medium-N)were established for MPF and MF.Results showed that soil APA was highest in MEBF,followed by MPF and MF.Soil APAs in both MPF and MF were not influenced by low-N treatments but depressed in medium-N treatments.However,soil APA in MEBF exhibited negative responses to high N additions,indicating that the environment of enhanced N depositions would reduce P supply for the mature forest ecosystem.Soil APA and its responses to N additions in subtropical forests were closely related to the succession stages in the forests. |
| Key Words: Dinghushan Biosphere Reserve,forest ecosystems,forest succession,phosphorus limitation,subtropical region |
| Citation: Huang, W. J., Zhang, D. Q., Li, Y. L., Lu, X. K., Zhang, W., Huang, J., Otieno, D., Xu, Z. H., Liu, J. X., Liu, S. Z. and Chu, G. W. 2012. Responses of Soil Acid Phosphomonoesterase Activity to Simulated Nitrogen Deposition in Three Forests of Subtropical China. Pedosphere. 22(5): 698-706. |
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