Fecha/hora: 12/06/2024 01:38:09

Biblioteca(s): 	INIA Tacuarembó.	
Fecha corriente: 	24/06/2020	
Fecha de la última actualización: 	24/06/2020	
Autoria: 	RACHID, C.; MASON, E.G.; WOOLLONS, R.C.; LANDSBERG, J.J.	
Afiliación: 	ANA CECILIA RACHID CASNATI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; EUAN G. MASON, School of Forestry, University of Canterbury, Christchurch, New Zealand; RICHARD C. WOOLLONS, School of Forestry, University of Canterbury, Christchurch, New Zealand; JOE J. LANDSBERG, Whithycombe, Church Lane, Mt Wilson, NSW, Australia.	
Título: 	Modelling growth of Pinus taeda and Eucalyptus grandis as a function of light sums modified by air temperature, vapour pressure deficit, and water balance	
Año de publicación: 	2020	
Fuente/Imprenta: 	New Zealand Journal of Forestry Science, v. 50, no. 3, 2020. DOI:  https://doi.org/10.33494/nzjfs502020x17x . OPEN ACCESS.	
ISSN: 	1179-5395	
DOI: 	10.33494/nzjfs502020x17x	
Idioma: 	Español	
Notas: 	Article history: Received for publication 9 November 2018; accepted in revised form 28 May 2020; published on-line: 17/06/2020.	
Contenido: 	Abstract: Background: Hybrid mensurational and physiological models seek to combine precision, process explanation, simplicity in parameter definition, and ability to estimate wood products. The aim of this study was to assess the suitability and the advantages of the hybrid mensurational-physiological approach where time has been substituted for light sums in growth equations, to replace traditional time-based models in forecasting systems for Eucalyptus grandis W.Hill and Pinus taeda L. Methods: Using 974 permanent sample plots from plantations in Uruguay, we adjusted growth equations to project dominant height, net basal area, maximum diameter breast height, and standard deviation of diameters as a function
of accumulated light restricted by modifiers that account for principal physiological limitations on photosynthesis. We analysed: i) the inclusion of terrain aspect and slope information for computing radiation; ii) the use of modifiers for temperature, vapour pressure deficit and water balance; iii) bias and precision of hybrid models with respect to time-based
equations. Results: Growth equations showed a good fit for both species when modelled as a function of light sums modified by vapor pressure deficit, air temperature, and water balance. Accounting for slope orientation when computing light sums did not increase precision. Compared to time-based formulations, hybrid models presented a root mean squared error
reduction of 10.7% and 4.5% on average for Eucalyptus grandis and for Pinus taeda, respectively, and the relationship between growth and resource availability was consistent with eco-physiological principles for both species. Conclusions: The hybrid methodology can be applied as a basis of forecasting systems for the species studies with significant advantages over time-based models, such as: (i) an increase in precision; (ii) an increase in spatial and time resolution; and (iii) the possibility of simulating the effect of changes in air temperature and water availability on tree growth.	
Palabras-Clave: 	EUCALYPTUS GRANDIS; FOREST MODELLING; HYBRID; MODIFIED LIGHT SUMS; PINUS TAEDA; STAND DYNAMICS.	
Categoría del tema: 	K10 Producción forestal	
URL: 	http://www.ainfo.inia.uy/digital/bitstream/item/14476/1/Rachid-2020-NZJFS-50-3.pdf	
Registro original: 	INIA Tacuarembó (TBO)	
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