Soil nitrogen status of larch plantations in comparison with secondary broad-leaved forest |
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Authors: | Cui Xiaoyang Zheng Guoqing |
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Institution: | (1) Northeast Forestry University, 150040 Harbin, P.R. China;(2) Heilongjiang Research Institute of Forest Management, 150040 Harbin, China |
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Abstract: | Soils were collected from.three neighboring forest sites: 36-year-old larch plantation, 11-year-old larch plantation, and natural secondary broad-leaved forest (as control). Soil pH, total C. totaI N, C/N ratio. and available N (NO3-N and NH4-N) were measured. Laboratory incubations of soil samples were conducted during a 50 days period for the measurement of nitrogen mineralization rate and nitrification potenial. The results proved a degeneration in soil nitrogen status with stand age of larch plantations, which implicated one important aspect of soil degradation when natural forest was replaced by coniferous plantations. |
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Keywords: | Larch plantation Secondary broad-leaved Forest Soil Nitrogen |
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