气候变化领域集成服务门户(CCPortal): Dynamics of soil nitrogen cycling and losses under Norway spruce logging residues on a clear-cut

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DOI	10.1016/j.foreco.2019.06.041
	Dynamics of soil nitrogen cycling and losses under Norway spruce logging residues on a clear-cut
	Smolander A.; Törmänen T.; Kitunen V.; Lindroos A.-J.
发表日期	2019
ISSN	0378-1127
卷号	449
英文摘要	This study aimed to determine the effects of Norway spruce logging residues on the early-stage dynamics of N cycling processes on a clear cut and how this is related to N losses via leaching or nitrous oxide emissions. We compared N cycling processes in soil under spruce logging residues (fresh residues 40 kg m−2) and in corresponding soil without the residues for four growing seasons on a clear-cut in southern Finland. In addition, two other sites were studied in the same region six years after clear-cutting in plots with three different amounts of spruce logging residues (0, 10, 40 kg m−2). Logging residues strongly stimulated net nitrification within the first three months after the residue treatment, and this stimulation continued over the whole study period, although NO3-N concentrations in the soil decreased. Residues increased the pH, rate of net N mineralization and microbial C-to-N ratio. N2O production in the laboratory and fluxes in the field were both studied after four growing seasons. N2O production was higher in the humus layer under the residues and originated from both autotrophic nitrification and denitrification. N2O fluxes in the field were low but were also higher in the residue-containing plots. N concentrations in percolate water were monitored for four years at the same site. Logging residues increased NO3-N and NH4-N concentrations; the highest concentrations were found during the second and third years after clear-cutting. After that the concentrations of dissolved organic N increased. Both the percolate water study at this site and the N cycling studies at the two other sites six years after clear-cutting showed that the largest amount of residues resulted in the highest rates of net N mineralization and net nitrification and the highest concentrations of mineral N forms in the percolate water. The amount and decomposition stage of the logging residues as well as the development of ground vegetation may together determine the dynamics of soil N cycling processes and losses. © 2019 Elsevier B.V.
英文关键词	Forest soil; Logging residues; N cycling; N losses; Norway spruce; Percolation water
语种	英语
scopus关键词	Dynamics; Mineralogy; Nitrification; Nitrogen; Nitrogen oxides; Plants (botany); Solvents; Forest soils; Logging residues; N cycling; N loss; Norway spruce; Percolation water; Soils; clearcutting; coniferous forest; forest soil; growing season; logging (timber); nitrogen cycle; percolation; plant residue; soil nitrogen; Dynamics; Logging Residues; Nitrification; Nitrogen Oxides; Solvents; Finland; Picea; Picea abies
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155833
作者单位	Natural Resources Institute Finland, Latokartanonkaari 9, Helsinki, FI-00790, Finland; Natural Resources Institute Finland, Tietotie 2, Espoo, FI-02150, Finland
推荐引用方式 GB/T 7714	Smolander A.,Törmänen T.,Kitunen V.,et al. Dynamics of soil nitrogen cycling and losses under Norway spruce logging residues on a clear-cut[J],2019,449.
APA	Smolander A.,Törmänen T.,Kitunen V.,&Lindroos A.-J..(2019).Dynamics of soil nitrogen cycling and losses under Norway spruce logging residues on a clear-cut.Forest Ecology and Management,449.
MLA	Smolander A.,et al."Dynamics of soil nitrogen cycling and losses under Norway spruce logging residues on a clear-cut".Forest Ecology and Management 449(2019).