期刊
FOREST ECOLOGY AND MANAGEMENT
卷 187, 期 1, 页码 49-60出版社
ELSEVIER
DOI: 10.1016/S0378-1127(03)00309-8
关键词
litterfall; microbial biomass; mine restoration; nitrogen fixers; nitrogen mineralization; soil development
类别
This study describes the impact of young high-density plantations of two native leguminous (Albizia procera and A. lebbeck) and one non-leguminous timber tree (Tectona grandis) species on the soil redevelopment process during the early phase of mine restoration in a dry tropical environment. There was a general improvement in soil properties due to establishment of plantations. Highest soil organic C values were found in A. lebbeck plantations and lowest in T grandis plantations. Both A. lebbeck and A. procera substantially increased levels of nitrogen in soil. However, A. procera, with slow decomposing litter, was not as effective in raising N levels in the soil as A. lebbeck, indicating that all N fixers may not be equally efficient in raising soil N levels. Soil microbial biomass and N mineralization rates were always higher in plantations of N-fixer species. A continued increase with age in microbial C:total C ratio indicates these plantations have yet to reach steady state. (C) 2003 Elsevier B.V. All rights reserved.
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