Modeling soil nutrient limitations to crop production in semiarid NE of Brazil with a modified EPIC version : II. Field test of the model
The validity of the modifications in the source code of EPIC for simulation of crop development in semiarid conditions, described in de Barros et al. [de Barros, I., Williams, J.R., Gaiser, T. Modeling soil nutrient limitations to crop production in semiarid NE of Brazil with a modified EPIC version. I. Changes in the source code of the model. Ecol. Modell., submitted for publication] was tested against the results of 3 years, field experiment with nutrient omission using intercropping between maize and cowpea. The plant biomass production, grain yield, N, P, and K uptake by both crops were measured during the period of 1998-2000 and compared with simulated values. Reasonably good agreement and accuracy was obtained between the measured and simulated values for all evaluated parameters. Slight overestimation of grain yield by the simulations was attributed to high rates of floral abortion caused by dry spells during the flowering periods of 1998 and 1999, since this factor is not considered in the model yet. Improvements of the accuracy of the model may also be obtained by more comprehensive understanding of soil resource use by component plants in mixed cropping systems. Therefore, it is necessary to generate more knowledge about the partitioning of the resources by the crops before being incorporated into modeling approaches. The model was sensitive to climate variations and changes in soil chemical properties due to the application of fertilizers and/or lime under the tropical semiarid conditions of the NE of Brazil. Once calibrated and validated for different crops and soil types of this region, the model will be appropriate as tool for regional planning.
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dig-cirad-fr-5231282024-01-28T12:59:20Z http://agritrop.cirad.fr/523128/ http://agritrop.cirad.fr/523128/ Modeling soil nutrient limitations to crop production in semiarid NE of Brazil with a modified EPIC version : II. Field test of the model. De Barros Inacio, Williams Jimmy R., Gaiser Thomas. 2005. Ecological Modelling, 181 (4) : 567-580.https://doi.org/10.1016/j.ecolmodel.2004.03.018 <https://doi.org/10.1016/j.ecolmodel.2004.03.018> Modeling soil nutrient limitations to crop production in semiarid NE of Brazil with a modified EPIC version : II. Field test of the model De Barros, Inacio Williams, Jimmy R. Gaiser, Thomas eng 2005 Ecological Modelling F61 - Physiologie végétale - Nutrition U10 - Informatique, mathématiques et statistiques F62 - Physiologie végétale - Croissance et développement Zea mays Vigna unguiculata modèle de simulation modèle mathématique culture intercalaire rendement des cultures taux de croissance absorption de substances nutritives fertilisation engrais NPK chaulage http://aims.fao.org/aos/agrovoc/c_8504 http://aims.fao.org/aos/agrovoc/c_8247 http://aims.fao.org/aos/agrovoc/c_24242 http://aims.fao.org/aos/agrovoc/c_24199 http://aims.fao.org/aos/agrovoc/c_3910 http://aims.fao.org/aos/agrovoc/c_10176 http://aims.fao.org/aos/agrovoc/c_16130 http://aims.fao.org/aos/agrovoc/c_5273 http://aims.fao.org/aos/agrovoc/c_10795 http://aims.fao.org/aos/agrovoc/c_5250 http://aims.fao.org/aos/agrovoc/c_25206 Brésil http://aims.fao.org/aos/agrovoc/c_1070 The validity of the modifications in the source code of EPIC for simulation of crop development in semiarid conditions, described in de Barros et al. [de Barros, I., Williams, J.R., Gaiser, T. Modeling soil nutrient limitations to crop production in semiarid NE of Brazil with a modified EPIC version. I. Changes in the source code of the model. Ecol. Modell., submitted for publication] was tested against the results of 3 years, field experiment with nutrient omission using intercropping between maize and cowpea. The plant biomass production, grain yield, N, P, and K uptake by both crops were measured during the period of 1998-2000 and compared with simulated values. Reasonably good agreement and accuracy was obtained between the measured and simulated values for all evaluated parameters. Slight overestimation of grain yield by the simulations was attributed to high rates of floral abortion caused by dry spells during the flowering periods of 1998 and 1999, since this factor is not considered in the model yet. Improvements of the accuracy of the model may also be obtained by more comprehensive understanding of soil resource use by component plants in mixed cropping systems. Therefore, it is necessary to generate more knowledge about the partitioning of the resources by the crops before being incorporated into modeling approaches. The model was sensitive to climate variations and changes in soil chemical properties due to the application of fertilizers and/or lime under the tropical semiarid conditions of the NE of Brazil. Once calibrated and validated for different crops and soil types of this region, the model will be appropriate as tool for regional planning. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/523128/1/523128.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1016/j.ecolmodel.2004.03.018 10.1016/j.ecolmodel.2004.03.018 http://catalogue-bibliotheques.cirad.fr/cgi-bin/koha/opac-detail.pl?biblionumber=183534 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ecolmodel.2004.03.018 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1016/j.ecolmodel.2004.03.018 |
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F61 - Physiologie végétale - Nutrition U10 - Informatique, mathématiques et statistiques F62 - Physiologie végétale - Croissance et développement Zea mays Vigna unguiculata modèle de simulation modèle mathématique culture intercalaire rendement des cultures taux de croissance absorption de substances nutritives fertilisation engrais NPK chaulage http://aims.fao.org/aos/agrovoc/c_8504 http://aims.fao.org/aos/agrovoc/c_8247 http://aims.fao.org/aos/agrovoc/c_24242 http://aims.fao.org/aos/agrovoc/c_24199 http://aims.fao.org/aos/agrovoc/c_3910 http://aims.fao.org/aos/agrovoc/c_10176 http://aims.fao.org/aos/agrovoc/c_16130 http://aims.fao.org/aos/agrovoc/c_5273 http://aims.fao.org/aos/agrovoc/c_10795 http://aims.fao.org/aos/agrovoc/c_5250 http://aims.fao.org/aos/agrovoc/c_25206 http://aims.fao.org/aos/agrovoc/c_1070 F61 - Physiologie végétale - Nutrition U10 - Informatique, mathématiques et statistiques F62 - Physiologie végétale - Croissance et développement Zea mays Vigna unguiculata modèle de simulation modèle mathématique culture intercalaire rendement des cultures taux de croissance absorption de substances nutritives fertilisation engrais NPK chaulage http://aims.fao.org/aos/agrovoc/c_8504 http://aims.fao.org/aos/agrovoc/c_8247 http://aims.fao.org/aos/agrovoc/c_24242 http://aims.fao.org/aos/agrovoc/c_24199 http://aims.fao.org/aos/agrovoc/c_3910 http://aims.fao.org/aos/agrovoc/c_10176 http://aims.fao.org/aos/agrovoc/c_16130 http://aims.fao.org/aos/agrovoc/c_5273 http://aims.fao.org/aos/agrovoc/c_10795 http://aims.fao.org/aos/agrovoc/c_5250 http://aims.fao.org/aos/agrovoc/c_25206 http://aims.fao.org/aos/agrovoc/c_1070 |
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F61 - Physiologie végétale - Nutrition U10 - Informatique, mathématiques et statistiques F62 - Physiologie végétale - Croissance et développement Zea mays Vigna unguiculata modèle de simulation modèle mathématique culture intercalaire rendement des cultures taux de croissance absorption de substances nutritives fertilisation engrais NPK chaulage http://aims.fao.org/aos/agrovoc/c_8504 http://aims.fao.org/aos/agrovoc/c_8247 http://aims.fao.org/aos/agrovoc/c_24242 http://aims.fao.org/aos/agrovoc/c_24199 http://aims.fao.org/aos/agrovoc/c_3910 http://aims.fao.org/aos/agrovoc/c_10176 http://aims.fao.org/aos/agrovoc/c_16130 http://aims.fao.org/aos/agrovoc/c_5273 http://aims.fao.org/aos/agrovoc/c_10795 http://aims.fao.org/aos/agrovoc/c_5250 http://aims.fao.org/aos/agrovoc/c_25206 http://aims.fao.org/aos/agrovoc/c_1070 F61 - Physiologie végétale - Nutrition U10 - Informatique, mathématiques et statistiques F62 - Physiologie végétale - Croissance et développement Zea mays Vigna unguiculata modèle de simulation modèle mathématique culture intercalaire rendement des cultures taux de croissance absorption de substances nutritives fertilisation engrais NPK chaulage http://aims.fao.org/aos/agrovoc/c_8504 http://aims.fao.org/aos/agrovoc/c_8247 http://aims.fao.org/aos/agrovoc/c_24242 http://aims.fao.org/aos/agrovoc/c_24199 http://aims.fao.org/aos/agrovoc/c_3910 http://aims.fao.org/aos/agrovoc/c_10176 http://aims.fao.org/aos/agrovoc/c_16130 http://aims.fao.org/aos/agrovoc/c_5273 http://aims.fao.org/aos/agrovoc/c_10795 http://aims.fao.org/aos/agrovoc/c_5250 http://aims.fao.org/aos/agrovoc/c_25206 http://aims.fao.org/aos/agrovoc/c_1070 De Barros, Inacio Williams, Jimmy R. Gaiser, Thomas Modeling soil nutrient limitations to crop production in semiarid NE of Brazil with a modified EPIC version : II. Field test of the model |
description |
The validity of the modifications in the source code of EPIC for simulation of crop development in semiarid conditions, described in de Barros et al. [de Barros, I., Williams, J.R., Gaiser, T. Modeling soil nutrient limitations to crop production in semiarid NE of Brazil with a modified EPIC version. I. Changes in the source code of the model. Ecol. Modell., submitted for publication] was tested against the results of 3 years, field experiment with nutrient omission using intercropping between maize and cowpea. The plant biomass production, grain yield, N, P, and K uptake by both crops were measured during the period of 1998-2000 and compared with simulated values. Reasonably good agreement and accuracy was obtained between the measured and simulated values for all evaluated parameters. Slight overestimation of grain yield by the simulations was attributed to high rates of floral abortion caused by dry spells during the flowering periods of 1998 and 1999, since this factor is not considered in the model yet. Improvements of the accuracy of the model may also be obtained by more comprehensive understanding of soil resource use by component plants in mixed cropping systems. Therefore, it is necessary to generate more knowledge about the partitioning of the resources by the crops before being incorporated into modeling approaches. The model was sensitive to climate variations and changes in soil chemical properties due to the application of fertilizers and/or lime under the tropical semiarid conditions of the NE of Brazil. Once calibrated and validated for different crops and soil types of this region, the model will be appropriate as tool for regional planning. |
format |
article |
topic_facet |
F61 - Physiologie végétale - Nutrition U10 - Informatique, mathématiques et statistiques F62 - Physiologie végétale - Croissance et développement Zea mays Vigna unguiculata modèle de simulation modèle mathématique culture intercalaire rendement des cultures taux de croissance absorption de substances nutritives fertilisation engrais NPK chaulage http://aims.fao.org/aos/agrovoc/c_8504 http://aims.fao.org/aos/agrovoc/c_8247 http://aims.fao.org/aos/agrovoc/c_24242 http://aims.fao.org/aos/agrovoc/c_24199 http://aims.fao.org/aos/agrovoc/c_3910 http://aims.fao.org/aos/agrovoc/c_10176 http://aims.fao.org/aos/agrovoc/c_16130 http://aims.fao.org/aos/agrovoc/c_5273 http://aims.fao.org/aos/agrovoc/c_10795 http://aims.fao.org/aos/agrovoc/c_5250 http://aims.fao.org/aos/agrovoc/c_25206 http://aims.fao.org/aos/agrovoc/c_1070 |
author |
De Barros, Inacio Williams, Jimmy R. Gaiser, Thomas |
author_facet |
De Barros, Inacio Williams, Jimmy R. Gaiser, Thomas |
author_sort |
De Barros, Inacio |
title |
Modeling soil nutrient limitations to crop production in semiarid NE of Brazil with a modified EPIC version : II. Field test of the model |
title_short |
Modeling soil nutrient limitations to crop production in semiarid NE of Brazil with a modified EPIC version : II. Field test of the model |
title_full |
Modeling soil nutrient limitations to crop production in semiarid NE of Brazil with a modified EPIC version : II. Field test of the model |
title_fullStr |
Modeling soil nutrient limitations to crop production in semiarid NE of Brazil with a modified EPIC version : II. Field test of the model |
title_full_unstemmed |
Modeling soil nutrient limitations to crop production in semiarid NE of Brazil with a modified EPIC version : II. Field test of the model |
title_sort |
modeling soil nutrient limitations to crop production in semiarid ne of brazil with a modified epic version : ii. field test of the model |
url |
http://agritrop.cirad.fr/523128/ http://agritrop.cirad.fr/523128/1/523128.pdf |
work_keys_str_mv |
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1792496007822442496 |