Nitrogen deposition and soil nitrogen dynamics in subtropical evergreen broad-leaved stands along an age-sequence

In order to reveal the effects of nitrogen (N) deposition on forest ecosystems, we investigated the soil N dynamics across a chronosequence of subtropical evergreen broad-leaved forest stands in eastern China for two years. Current atmospheric N deposition was 18 kg ha-1 year-1. Nitrogen fluxes in t...

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Autores principales:	Zhao,H.F, Yao,X.J, Wang,Q, Chen,Y.S, Xu,X.N
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2013
Materias:	age-sequence mineralization potential nitrogen availability nitrogen leaching subtropical forest
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162013000200001
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spelling	oai:scielo:S0718-951620130002000012013-09-09Nitrogen deposition and soil nitrogen dynamics in subtropical evergreen broad-leaved stands along an age-sequenceZhao,H.FYao,X.JWang,QChen,Y.SXu,X.N age-sequence mineralization potential nitrogen availability nitrogen leaching subtropical forest In order to reveal the effects of nitrogen (N) deposition on forest ecosystems, we investigated the soil N dynamics across a chronosequence of subtropical evergreen broad-leaved forest stands in eastern China for two years. Current atmospheric N deposition was 18 kg ha-1 year-1. Nitrogen fluxes in throughfall varied from 17 to 23 kg ha-1 year-1 with an increasing trend with stand age. The total N fluxes ranged from 7.3 to 9.3 kg ha-1 year¹ under the forest floor and from 1.2 to 2.5 kg ha-1 year¹ at 30-cm soil depth with the high values in the older stand. The net mineralization potentials in the old stands ranged from 19 to 24 mg kg-1 month-1, and were 30-55% higher than those in the young stands. The inorganic N concentration and flux at 30-cm soil depth were significantly (p < 0.05) correlated with net mineralization potential. The potential N transformation rates were significantly (p < 0.05) correlated with soil C/N ratio and DON while not with forest floor C/N ratio. Input-output budget suggests that the forest at our site is a finer buffering system to N deposition and is far from N saturation.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.13 n.2 20132013-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162013000200001en10.4067/S0718-95162013005000021
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	age-sequence mineralization potential nitrogen availability nitrogen leaching subtropical forest
spellingShingle	age-sequence mineralization potential nitrogen availability nitrogen leaching subtropical forest Zhao,H.F Yao,X.J Wang,Q Chen,Y.S Xu,X.N Nitrogen deposition and soil nitrogen dynamics in subtropical evergreen broad-leaved stands along an age-sequence
description	In order to reveal the effects of nitrogen (N) deposition on forest ecosystems, we investigated the soil N dynamics across a chronosequence of subtropical evergreen broad-leaved forest stands in eastern China for two years. Current atmospheric N deposition was 18 kg ha-1 year-1. Nitrogen fluxes in throughfall varied from 17 to 23 kg ha-1 year-1 with an increasing trend with stand age. The total N fluxes ranged from 7.3 to 9.3 kg ha-1 year¹ under the forest floor and from 1.2 to 2.5 kg ha-1 year¹ at 30-cm soil depth with the high values in the older stand. The net mineralization potentials in the old stands ranged from 19 to 24 mg kg-1 month-1, and were 30-55% higher than those in the young stands. The inorganic N concentration and flux at 30-cm soil depth were significantly (p < 0.05) correlated with net mineralization potential. The potential N transformation rates were significantly (p < 0.05) correlated with soil C/N ratio and DON while not with forest floor C/N ratio. Input-output budget suggests that the forest at our site is a finer buffering system to N deposition and is far from N saturation.
author	Zhao,H.F Yao,X.J Wang,Q Chen,Y.S Xu,X.N
author_facet	Zhao,H.F Yao,X.J Wang,Q Chen,Y.S Xu,X.N
author_sort	Zhao,H.F
title	Nitrogen deposition and soil nitrogen dynamics in subtropical evergreen broad-leaved stands along an age-sequence
title_short	Nitrogen deposition and soil nitrogen dynamics in subtropical evergreen broad-leaved stands along an age-sequence
title_full	Nitrogen deposition and soil nitrogen dynamics in subtropical evergreen broad-leaved stands along an age-sequence
title_fullStr	Nitrogen deposition and soil nitrogen dynamics in subtropical evergreen broad-leaved stands along an age-sequence
title_full_unstemmed	Nitrogen deposition and soil nitrogen dynamics in subtropical evergreen broad-leaved stands along an age-sequence
title_sort	nitrogen deposition and soil nitrogen dynamics in subtropical evergreen broad-leaved stands along an age-sequence
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162013000200001
work_keys_str_mv	AT zhaohf nitrogendepositionandsoilnitrogendynamicsinsubtropicalevergreenbroadleavedstandsalonganagesequence AT yaoxj nitrogendepositionandsoilnitrogendynamicsinsubtropicalevergreenbroadleavedstandsalonganagesequence AT wangq nitrogendepositionandsoilnitrogendynamicsinsubtropicalevergreenbroadleavedstandsalonganagesequence AT chenys nitrogendepositionandsoilnitrogendynamicsinsubtropicalevergreenbroadleavedstandsalonganagesequence AT xuxn nitrogendepositionandsoilnitrogendynamicsinsubtropicalevergreenbroadleavedstandsalonganagesequence
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Nitrogen deposition and soil nitrogen dynamics in subtropical evergreen broad-leaved stands along an age-sequence

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