Nitrogen availability and mineralization in Pinus radiata stands fertilized mid-rotation at three contrasting sites

Fertilization of Pinus radiata plantations mid-rotation after thinning can alter soil nitrogen availability. However, the magnitudes and durations of tree and stand growth responses are not well understood across different soils with specific site conditions. Two mid-rotation fertilization trials in...

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Autores principales:	Ramírez,M. V, Rubilar,R. A, Montes,C, Stape,J.L, Fox,T.R, Lee Allen,H
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2016
Materias:	Forest fertilization nitrogen uptake growth response soil fertility granitic sandy red clay
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162016000100009
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spelling	oai:scielo:S0718-951620160001000092016-05-05Nitrogen availability and mineralization in Pinus radiata stands fertilized mid-rotation at three contrasting sitesRamírez,M. VRubilar,R. AMontes,CStape,J.LFox,T.RLee Allen,H Forest fertilization nitrogen uptake growth response soil fertility granitic sandy red clay Fertilization of Pinus radiata plantations mid-rotation after thinning can alter soil nitrogen availability. However, the magnitudes and durations of tree and stand growth responses are not well understood across different soils with specific site conditions. Two mid-rotation fertilization trials in Pinus radiata plantations with unexpected sustained growth responses for more than 6 years and volume gains of 25 m³ha-1 and 50 m³ ha-1 in sandy and granitic soil, respectively, and one trial with no response to fertilization were selected to study the monthly dynamics of nitrogen availability and net mineralization using in situ core incubations. After 2 years, the results showed that fertilization increased nitrogen mineralization and availability until 6 years in sandy soils and until 7 years in granitic soil following fertilization. This result explained the sustained stand growth response observed at these sites. When considering the magnitude of the response, large increases in mineralization rates and soil N availability were observed in the granitic soil relative to the sandy soil. Our results suggest that stands with available N-(NH4+ + NO3-) levels less than 2 kg ha-1 during spring and fall months or with N-(NO3-) levels lower than 0.2 kg ha-1 during any month may respond to N fertilization.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.16 n.1 20162016-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162016000100009en10.4067/S0718-95162016005000009
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Forest fertilization nitrogen uptake growth response soil fertility granitic sandy red clay
spellingShingle	Forest fertilization nitrogen uptake growth response soil fertility granitic sandy red clay Ramírez,M. V Rubilar,R. A Montes,C Stape,J.L Fox,T.R Lee Allen,H Nitrogen availability and mineralization in Pinus radiata stands fertilized mid-rotation at three contrasting sites
description	Fertilization of Pinus radiata plantations mid-rotation after thinning can alter soil nitrogen availability. However, the magnitudes and durations of tree and stand growth responses are not well understood across different soils with specific site conditions. Two mid-rotation fertilization trials in Pinus radiata plantations with unexpected sustained growth responses for more than 6 years and volume gains of 25 m³ha-1 and 50 m³ ha-1 in sandy and granitic soil, respectively, and one trial with no response to fertilization were selected to study the monthly dynamics of nitrogen availability and net mineralization using in situ core incubations. After 2 years, the results showed that fertilization increased nitrogen mineralization and availability until 6 years in sandy soils and until 7 years in granitic soil following fertilization. This result explained the sustained stand growth response observed at these sites. When considering the magnitude of the response, large increases in mineralization rates and soil N availability were observed in the granitic soil relative to the sandy soil. Our results suggest that stands with available N-(NH4+ + NO3-) levels less than 2 kg ha-1 during spring and fall months or with N-(NO3-) levels lower than 0.2 kg ha-1 during any month may respond to N fertilization.
author	Ramírez,M. V Rubilar,R. A Montes,C Stape,J.L Fox,T.R Lee Allen,H
author_facet	Ramírez,M. V Rubilar,R. A Montes,C Stape,J.L Fox,T.R Lee Allen,H
author_sort	Ramírez,M. V
title	Nitrogen availability and mineralization in Pinus radiata stands fertilized mid-rotation at three contrasting sites
title_short	Nitrogen availability and mineralization in Pinus radiata stands fertilized mid-rotation at three contrasting sites
title_full	Nitrogen availability and mineralization in Pinus radiata stands fertilized mid-rotation at three contrasting sites
title_fullStr	Nitrogen availability and mineralization in Pinus radiata stands fertilized mid-rotation at three contrasting sites
title_full_unstemmed	Nitrogen availability and mineralization in Pinus radiata stands fertilized mid-rotation at three contrasting sites
title_sort	nitrogen availability and mineralization in pinus radiata stands fertilized mid-rotation at three contrasting sites
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162016000100009
work_keys_str_mv	AT ramirezmv nitrogenavailabilityandmineralizationinpinusradiatastandsfertilizedmidrotationatthreecontrastingsites AT rubilarra nitrogenavailabilityandmineralizationinpinusradiatastandsfertilizedmidrotationatthreecontrastingsites AT montesc nitrogenavailabilityandmineralizationinpinusradiatastandsfertilizedmidrotationatthreecontrastingsites AT stapejl nitrogenavailabilityandmineralizationinpinusradiatastandsfertilizedmidrotationatthreecontrastingsites AT foxtr nitrogenavailabilityandmineralizationinpinusradiatastandsfertilizedmidrotationatthreecontrastingsites AT leeallenh nitrogenavailabilityandmineralizationinpinusradiatastandsfertilizedmidrotationatthreecontrastingsites
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Nitrogen availability and mineralization in Pinus radiata stands fertilized mid-rotation at three contrasting sites

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