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标题：Foliar turnover rates in Finland — comparing estimates from needle-cohort and litterfall-biomass methods
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作者：Boris Ťupek ; Raisa Mäkipää ; Juha Heikkinen 等
期刊名称：Boreal Environment Research
印刷版ISSN：1239-6095
出版年度：2015
卷号：20
期号：2
页码：283-304
语种：English
出版社：Finnish Limnological Society
摘要：Soil carbon models serving national greenhouse gas (GHG) inventories need precise litter input estimates that typically originate from regionally-averaged and species-specific biomass turnover rates. We compared the foliar turnover rates estimated from long-term measurements by two methods: the needle-cohort based turnover rates (NT; 1064 Scots pine and Norway spruce stands), used in Finnish GHG inventory, and litterfall-biomass based turnover rates (LT; 40 Scots pine, Norway spruce, and silver and downy birch stands). For evergreens, regionally averaged NT values (± SD) (0.139 ± 0.01, 0.1 ± 0.009 for spruce south and north of 64°N, and 0.278 ± 0.016, 0.213 ± 0.028 for pine, respectively) were greater than those used in the GHG inventory model in Finland (0.1, 0.05 for spruce in the south and north, and 0.245, 0.154 for pine, respectively). For deciduous forests, averaged LT values ± SD (0.784 ± 0.162, 0.634 ± 0.093 for birch in the south and north) were close to that (0.79) currently used for the whole of Finland.