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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 26, No. 6, 2005, pp. 609-615
Bioline Code: zr05059
Full paper language: Chinese
Document type: Research Article
Document available free of charge

Zoological Research, Vol. 26, No. 6, 2005, pp. 609-615

 en Responses of Soil Fauna Biomass to N Deposition in Three Forests in Subtropical China
XU Guo-liang, MO Jiang-ming, ZHOU Guo-yi

Abstract

Impacts of simulated atmospheric nitrogen (N) deposition on soil fauna biomass were studied in a 16 month period from May 2003 to August 2004. Plots were built in pine forest (PF), pine and broad-leaf mixed forest (MF) and monsoon evergreen broad-leaf forest (MEBF) in Dinghushan of subtropical China. Dissolved NH4NO3 equivalent to the control (No addition), low [50 kg/(hm2·a)], and medium [100 kg/(hm2·a)] was sprayed during the testing period. The biomass of soil fauna group was decided by an experimental standard based on research performed a long time in this area. When the data was averaged throughout the period and across the forests, there were no significant effects of N treatment on soil fauna biomass. However, effects could be observed in the interactions between N and forest type, and the interactions between N and sampling date. There were obviously positive effects of N treatment on soil fauna biomass in PF, but negative effects under abundant N deposition in MEBF. After one year the distribution of soil fauna biomass in different forests was changed significantly, with MEBF > MF > PF before the treatments and PF > MEBF > MF after the treatments. Low N treatment was positive to soil fauna biomass to a certain extent, which increased soil fauna biomass by 44.33% in MEBF, 9.19% in MF and 60.66% in PF; but soil fauna biomass declined generally under the medium treatment, 32.55% in MEBF and 2.81% in MF. The results indicated that there might be a threshold in the effects of N deposition on soil fauna biomass.

Keywords
Soil fauna, Biomass, N deposition, Forest ecosystem

 
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Alternative site location: http://www.zoores.ac.cn/

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