Model Validation for Estimating the Leaf Stomatal Conductance in cv. Cabernet Sauvignon Grapevines
The coupled model of assimilation and stomatal conductance (A-g s) was evaluated to estimate leaf stomatal conductance of a drip-irrigated vineyard (Vitis vinifera L. cv. Cabernet Sauvignon) located in the Pencahue Valley (35°22’ S, 71°47’ W, 150 m.a.s.l.), Maule Region, Chile, d...
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| Lenguaje: | English |
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Instituto de Investigaciones Agropecuarias, INIA
2009
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oai:scielo:S0718-583920090001000112018-10-01Model Validation for Estimating the Leaf Stomatal Conductance in cv. Cabernet Sauvignon GrapevinesJara-Rojas,FranciscoOrtega-Farías,SamuelValdés-Gómez,HéctorPoblete,Carlosdel Pozo,Alejandro A-g s model photosynthesis mesophyll conductance stem water potential sensitivity analysis The coupled model of assimilation and stomatal conductance (A-g s) was evaluated to estimate leaf stomatal conductance of a drip-irrigated vineyard (Vitis vinifera L. cv. Cabernet Sauvignon) located in the Pencahue Valley (35°22’ S, 71°47’ W, 150 m.a.s.l.), Maule Region, Chile, during the 2003-2004 and the 2004-2005 growing seasons. Additionally, a calibration of the three parameters mesophyll conductance (g m), maximum specific humidity (Dmax) and coupled factor (f0) was applied on vines growing in 35 L pots. An infrared gas analyzer was used to calibrate and evaluate the A-g s which allowed simultaneous measuring of the leaf net CO2 assimilation (A) and stomatal conductance (g s) in 2 to 3 h intervals of time. The calibration indicated that the g m,, Dmax and f0 values were 1.15 mm s-1, 52.31 g kg-1 and 0.90, respectively. The validation in the drip-irrigated vineyard indicated that the A-g s model was able to estimate the leaf stomatal conductance with a root mean square error (RMSE) of 0.05 mol m-2 s-1, model efficiency of 61% and agreement index of 90%. The sensitivity analysis indicated that the A-g s model is affected considerably by the g m, Dmax and f0 parameterization.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.69 n.1 20092009-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000100011en10.4067/S0718-58392009000100011 |
| institution |
Scielo Chile |
| collection |
Scielo Chile |
| language |
English |
| topic |
A-g s model photosynthesis mesophyll conductance stem water potential sensitivity analysis |
| spellingShingle |
A-g s model photosynthesis mesophyll conductance stem water potential sensitivity analysis Jara-Rojas,Francisco Ortega-Farías,Samuel Valdés-Gómez,Héctor Poblete,Carlos del Pozo,Alejandro Model Validation for Estimating the Leaf Stomatal Conductance in cv. Cabernet Sauvignon Grapevines |
| description |
The coupled model of assimilation and stomatal conductance (A-g s) was evaluated to estimate leaf stomatal conductance of a drip-irrigated vineyard (Vitis vinifera L. cv. Cabernet Sauvignon) located in the Pencahue Valley (35°22’ S, 71°47’ W, 150 m.a.s.l.), Maule Region, Chile, during the 2003-2004 and the 2004-2005 growing seasons. Additionally, a calibration of the three parameters mesophyll conductance (g m), maximum specific humidity (Dmax) and coupled factor (f0) was applied on vines growing in 35 L pots. An infrared gas analyzer was used to calibrate and evaluate the A-g s which allowed simultaneous measuring of the leaf net CO2 assimilation (A) and stomatal conductance (g s) in 2 to 3 h intervals of time. The calibration indicated that the g m,, Dmax and f0 values were 1.15 mm s-1, 52.31 g kg-1 and 0.90, respectively. The validation in the drip-irrigated vineyard indicated that the A-g s model was able to estimate the leaf stomatal conductance with a root mean square error (RMSE) of 0.05 mol m-2 s-1, model efficiency of 61% and agreement index of 90%. The sensitivity analysis indicated that the A-g s model is affected considerably by the g m, Dmax and f0 parameterization. |
| author |
Jara-Rojas,Francisco Ortega-Farías,Samuel Valdés-Gómez,Héctor Poblete,Carlos del Pozo,Alejandro |
| author_facet |
Jara-Rojas,Francisco Ortega-Farías,Samuel Valdés-Gómez,Héctor Poblete,Carlos del Pozo,Alejandro |
| author_sort |
Jara-Rojas,Francisco |
| title |
Model Validation for Estimating the Leaf Stomatal Conductance in cv. Cabernet Sauvignon Grapevines |
| title_short |
Model Validation for Estimating the Leaf Stomatal Conductance in cv. Cabernet Sauvignon Grapevines |
| title_full |
Model Validation for Estimating the Leaf Stomatal Conductance in cv. Cabernet Sauvignon Grapevines |
| title_fullStr |
Model Validation for Estimating the Leaf Stomatal Conductance in cv. Cabernet Sauvignon Grapevines |
| title_full_unstemmed |
Model Validation for Estimating the Leaf Stomatal Conductance in cv. Cabernet Sauvignon Grapevines |
| title_sort |
model validation for estimating the leaf stomatal conductance in cv. cabernet sauvignon grapevines |
| publisher |
Instituto de Investigaciones Agropecuarias, INIA |
| publishDate |
2009 |
| url |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000100011 |
| work_keys_str_mv |
AT jararojasfrancisco modelvalidationforestimatingtheleafstomatalconductanceincvcabernetsauvignongrapevines AT ortegafariassamuel modelvalidationforestimatingtheleafstomatalconductanceincvcabernetsauvignongrapevines AT valdesgomezhector modelvalidationforestimatingtheleafstomatalconductanceincvcabernetsauvignongrapevines AT pobletecarlos modelvalidationforestimatingtheleafstomatalconductanceincvcabernetsauvignongrapevines AT delpozoalejandro modelvalidationforestimatingtheleafstomatalconductanceincvcabernetsauvignongrapevines |
| _version_ |
1714205266602360832 |