A potential nutritional modifier for predicting primary productivity of Pinus radiata in New Zealand using a simplified radiation-use efficiency model

A potential nutritional modifier for predicting primary productivity of Pinus radiata in New Zealand using a simplified radiation-use efficiency model

H.E. Bown, E.G. Mason, M.S. Watt, and P.W. Clinton. 2013. A potential nutritional modifier for predicting primary productivity of Pinus radiata in New Zealand using a simplified radiation-use efficiency model. Cien. Inv. Agr. 40(2): 361-374. The 3-PG (Physiological Principles in Predicting Growth) radiation-use efficiency model has been widely used and tested for predicting the primary productivity of forests all over the world. This radiation-use efficiency model accounts for plant nutrition through a user-defined dimensionless fertility parameter (fN) that determines the effects a unit of radiation. Currently, this fertility parameter has to be entered by the user based on intuition or experience. The goal of this study was to propose a fertility modifier fN) for the radiation-use efficiency family of models based on soil chemical and physical variables. We determined gross- and net-primary productivity for a set of 10 intensively measured mini-plots of Pinus radiata D. Don on the South Island of New Zealand and then fitted a fertility modifier, fN, to the set of plots using a simplified radiation-use efficiency model. Fitted fN values were correlated to soil physical and chemical variables. The nutritional modifier, fN, significantly increased with the soil N (%) and decreased with the soil C:N ratio, and both, soil N and the C:N ratio, were measured in the upper 10 cm of soil fN = 1.32 - 0.04 C:N + 0.99 N, r² = 0.73, P = 0.009). If confirmed, this relationship may prove useful to estimate the fertility modifier of radiation-use efficiency models (e.g., 3-PG) for Pinus radiata plantations in New Zealand. However, caution should be exercised for sites where mineral nutrients other than nitrogen limit productivity.

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Main Authors: Bown,Horacio E, Mason,Euan G, Watt,Michael S, Clinton,Peter W
Format: Digital revista
Language:English
Published: Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal 2013
Online Access:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000200011
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spelling oai:scielo:S0718-162020130002000112013-10-23A potential nutritional modifier for predicting primary productivity of Pinus radiata in New Zealand using a simplified radiation-use efficiency modelBown,Horacio EMason,Euan GWatt,Michael SClinton,Peter W Nutritional modifier Pinus radiata primary productivity radiation-use efficiency soil C/N soil N H.E. Bown, E.G. Mason, M.S. Watt, and P.W. Clinton. 2013. A potential nutritional modifier for predicting primary productivity of Pinus radiata in New Zealand using a simplified radiation-use efficiency model. Cien. Inv. Agr. 40(2): 361-374. The 3-PG (Physiological Principles in Predicting Growth) radiation-use efficiency model has been widely used and tested for predicting the primary productivity of forests all over the world. This radiation-use efficiency model accounts for plant nutrition through a user-defined dimensionless fertility parameter (fN) that determines the effects a unit of radiation. Currently, this fertility parameter has to be entered by the user based on intuition or experience. The goal of this study was to propose a fertility modifier fN) for the radiation-use efficiency family of models based on soil chemical and physical variables. We determined gross- and net-primary productivity for a set of 10 intensively measured mini-plots of Pinus radiata D. Don on the South Island of New Zealand and then fitted a fertility modifier, fN, to the set of plots using a simplified radiation-use efficiency model. Fitted fN values were correlated to soil physical and chemical variables. The nutritional modifier, fN, significantly increased with the soil N (%) and decreased with the soil C:N ratio, and both, soil N and the C:N ratio, were measured in the upper 10 cm of soil fN = 1.32 - 0.04 C:N + 0.99 N, r² = 0.73, P = 0.009). If confirmed, this relationship may prove useful to estimate the fertility modifier of radiation-use efficiency models (e.g., 3-PG) for Pinus radiata plantations in New Zealand. However, caution should be exercised for sites where mineral nutrients other than nitrogen limit productivity.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería ForestalCiencia e investigación agraria v.40 n.2 20132013-05-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000200011en10.4067/S0718-16202013000200011
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country Chile
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libraryname SciELO
language English
format Digital
author Bown,Horacio E
Mason,Euan G
Watt,Michael S
Clinton,Peter W
spellingShingle Bown,Horacio E
Mason,Euan G
Watt,Michael S
Clinton,Peter W
A potential nutritional modifier for predicting primary productivity of Pinus radiata in New Zealand using a simplified radiation-use efficiency model
author_facet Bown,Horacio E
Mason,Euan G
Watt,Michael S
Clinton,Peter W
author_sort Bown,Horacio E
title A potential nutritional modifier for predicting primary productivity of Pinus radiata in New Zealand using a simplified radiation-use efficiency model
title_short A potential nutritional modifier for predicting primary productivity of Pinus radiata in New Zealand using a simplified radiation-use efficiency model
title_full A potential nutritional modifier for predicting primary productivity of Pinus radiata in New Zealand using a simplified radiation-use efficiency model
title_fullStr A potential nutritional modifier for predicting primary productivity of Pinus radiata in New Zealand using a simplified radiation-use efficiency model
title_full_unstemmed A potential nutritional modifier for predicting primary productivity of Pinus radiata in New Zealand using a simplified radiation-use efficiency model
title_sort potential nutritional modifier for predicting primary productivity of pinus radiata in new zealand using a simplified radiation-use efficiency model
description H.E. Bown, E.G. Mason, M.S. Watt, and P.W. Clinton. 2013. A potential nutritional modifier for predicting primary productivity of Pinus radiata in New Zealand using a simplified radiation-use efficiency model. Cien. Inv. Agr. 40(2): 361-374. The 3-PG (Physiological Principles in Predicting Growth) radiation-use efficiency model has been widely used and tested for predicting the primary productivity of forests all over the world. This radiation-use efficiency model accounts for plant nutrition through a user-defined dimensionless fertility parameter (fN) that determines the effects a unit of radiation. Currently, this fertility parameter has to be entered by the user based on intuition or experience. The goal of this study was to propose a fertility modifier fN) for the radiation-use efficiency family of models based on soil chemical and physical variables. We determined gross- and net-primary productivity for a set of 10 intensively measured mini-plots of Pinus radiata D. Don on the South Island of New Zealand and then fitted a fertility modifier, fN, to the set of plots using a simplified radiation-use efficiency model. Fitted fN values were correlated to soil physical and chemical variables. The nutritional modifier, fN, significantly increased with the soil N (%) and decreased with the soil C:N ratio, and both, soil N and the C:N ratio, were measured in the upper 10 cm of soil fN = 1.32 - 0.04 C:N + 0.99 N, r² = 0.73, P = 0.009). If confirmed, this relationship may prove useful to estimate the fertility modifier of radiation-use efficiency models (e.g., 3-PG) for Pinus radiata plantations in New Zealand. However, caution should be exercised for sites where mineral nutrients other than nitrogen limit productivity.
publisher Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal
publishDate 2013
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000200011
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