Simulation of Dry Matter Productivity and Water Dynamics in a Chilean Patagonian Range

This paper describes a simulation model combining the main components of water balance and growth of perennial grassland steppe in Chilean Patagonia, to estimate long-term annual production (Yr, kg ha-1) and sheep carrying capacity (GC, sheep equivalent [EO] ha-1). The model is based on climate-wate...

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Autores principales:	Castellaro G,Giorgio, Morales S,Luis, Ahumada,Mario, Barozzi,Azelio
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2010
Materias:	grassland simulation models grazing capacity Patagonian steppe range capacidad de carga modelos de simulación de praderas pastizales esteparios de la Patagonia
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000300009
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spelling	oai:scielo:S0718-583920100003000092018-10-01Simulation of Dry Matter Productivity and Water Dynamics in a Chilean Patagonian RangeCastellaro G,GiorgioMorales S,LuisAhumada,MarioBarozzi,Azelio grassland simulation models grazing capacity Patagonian steppe range capacidad de carga modelos de simulación de praderas pastizales esteparios de la Patagonia This paper describes a simulation model combining the main components of water balance and growth of perennial grassland steppe in Chilean Patagonia, to estimate long-term annual production (Yr, kg ha-1) and sheep carrying capacity (GC, sheep equivalent [EO] ha-1). The model is based on climate-water balance relationships, where the basic process is evapotranspiration. The model calculates Yr depending on the accumulation of transpiration and the water use efficiency from the time of growth initiation until the grassland accumulates the maximum amount of dry matter (DM). Depending on Yr, the DM requirement of EO, the proper use factor of grassland and a slope correction factor, a range site GC is calculated. Simulations were performed using actual climate data sets of eight growing seasons at Kampenaike (52°41’ S; 70°54’W; 12 m.a.s.l.) and a long-term simulation in the same location, using a stochastic weather variables generator. Through the model it was possible to estimate the water loss associated with the components of water balance and estimate the restriction imposed by water deficit on Yr. By simulating many years, it was possible to establish a normal distribution of GC with 0.629 EO ha-1 yr-1, associated with 80% probability of being exceeded, which is lower than values reported in field assessments. This method calculates GC with a conservational approach, taking into account soil and climatic variability in semiarid ecosystems.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.70 n.3 20102010-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000300009en10.4067/S0718-58392010000300009
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	grassland simulation models grazing capacity Patagonian steppe range capacidad de carga modelos de simulación de praderas pastizales esteparios de la Patagonia
spellingShingle	grassland simulation models grazing capacity Patagonian steppe range capacidad de carga modelos de simulación de praderas pastizales esteparios de la Patagonia Castellaro G,Giorgio Morales S,Luis Ahumada,Mario Barozzi,Azelio Simulation of Dry Matter Productivity and Water Dynamics in a Chilean Patagonian Range
description	This paper describes a simulation model combining the main components of water balance and growth of perennial grassland steppe in Chilean Patagonia, to estimate long-term annual production (Yr, kg ha-1) and sheep carrying capacity (GC, sheep equivalent [EO] ha-1). The model is based on climate-water balance relationships, where the basic process is evapotranspiration. The model calculates Yr depending on the accumulation of transpiration and the water use efficiency from the time of growth initiation until the grassland accumulates the maximum amount of dry matter (DM). Depending on Yr, the DM requirement of EO, the proper use factor of grassland and a slope correction factor, a range site GC is calculated. Simulations were performed using actual climate data sets of eight growing seasons at Kampenaike (52°41’ S; 70°54’W; 12 m.a.s.l.) and a long-term simulation in the same location, using a stochastic weather variables generator. Through the model it was possible to estimate the water loss associated with the components of water balance and estimate the restriction imposed by water deficit on Yr. By simulating many years, it was possible to establish a normal distribution of GC with 0.629 EO ha-1 yr-1, associated with 80% probability of being exceeded, which is lower than values reported in field assessments. This method calculates GC with a conservational approach, taking into account soil and climatic variability in semiarid ecosystems.
author	Castellaro G,Giorgio Morales S,Luis Ahumada,Mario Barozzi,Azelio
author_facet	Castellaro G,Giorgio Morales S,Luis Ahumada,Mario Barozzi,Azelio
author_sort	Castellaro G,Giorgio
title	Simulation of Dry Matter Productivity and Water Dynamics in a Chilean Patagonian Range
title_short	Simulation of Dry Matter Productivity and Water Dynamics in a Chilean Patagonian Range
title_full	Simulation of Dry Matter Productivity and Water Dynamics in a Chilean Patagonian Range
title_fullStr	Simulation of Dry Matter Productivity and Water Dynamics in a Chilean Patagonian Range
title_full_unstemmed	Simulation of Dry Matter Productivity and Water Dynamics in a Chilean Patagonian Range
title_sort	simulation of dry matter productivity and water dynamics in a chilean patagonian range
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000300009
work_keys_str_mv	AT castellaroggiorgio simulationofdrymatterproductivityandwaterdynamicsinachileanpatagonianrange AT moralessluis simulationofdrymatterproductivityandwaterdynamicsinachileanpatagonianrange AT ahumadamario simulationofdrymatterproductivityandwaterdynamicsinachileanpatagonianrange AT barozziazelio simulationofdrymatterproductivityandwaterdynamicsinachileanpatagonianrange
_version_	1714205285442125824

Simulation of Dry Matter Productivity and Water Dynamics in a Chilean Patagonian Range

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