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Yield and Dry Matter Simulation Using the Saltmed Model for Five Quinoa (Chenopodium Quinoa) Accessions Under Deficit Irrigation in South Morocco
The frequent drought in the Mediterranean region requires better water and crop management. Selection of suitable drought‐tolerant crops and the application of water‐saving strategies are essential. For this reason, a drought‐tolerant crop, quinoa, was selected to test its suitability to be grown un...
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Published in: | Irrigation and drainage 2017-07, Vol.66 (3), p.340-350 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
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Online Access: | Get full text |
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Summary: | The frequent drought in the Mediterranean region requires better water and crop management. Selection of suitable drought‐tolerant crops and the application of water‐saving strategies are essential.
For this reason, a drought‐tolerant crop, quinoa, was selected to test its suitability to be grown under Morocco's conditions. In 2012, five accessions of quinoa (Chenopodium quinoa Willd.) were studied in a field in Agadir, Morocco. Four irrigation levels were applied; the control treatment received 100% of the crop water requirement and three other treatments received 75, 50 and 25% of the crop water requirement.
The SALTMED model was calibrated using yield and total dry matter data obtained from the control treatment for each accession. The accessions differed in plant height, growth stage duration, harvest date, harvest index, leaf area index and photosynthesis efficiency. The SALTMED model simulated the total dry matter and grain yield for the five quinoa accessions under the different deficit irrigation regimes with reasonable precision, as confirmed by the values of coefficient of determination, R2 of 0.96 and 0.92, respectively.
The results indicate that deficit irrigation at 75% would only reduce the yield of accession L142 by 5%. Therefore, L142 was recommended to the growers in Morocco. Copyright © 2017 John Wiley & Sons, Ltd.
Résumé
La sécheresse fréquente dans la région méditerranéenne exige une meilleure gestion de l'eau et des cultures. La sélection des cultures résistantes à la sécheresse et l'application de stratégies d'économie d'eau sont essentielles.
Pour cette raison, une culture tolérante à la sécheresse, le quinoa, a été choisie pour tester son aptitude à se développer dans les conditions du Maroc. En 2012, cinq accessions de quinoa (Chenopodium quinoa Willd.) ont été étudiées dans un champ à Agadir (Maroc). Quatre niveaux d'irrigation ont été appliqués, le traitement de contrôle a reçu 100% des besoins en eau des cultures et trois autres traitements 75, 50 et 25%, respectivement.
Le modèle SALTMED a été calibré en utilisant le rendement et les données totales de matière sèche obtenues à partir du traitement de contrôle pour chaque accession. Les accessions différaient par la hauteur de la plante, la durée de phase de croissance, la date de récolte, l'indice de récolte, l'indice de surface foliaire et l'efficacité de la photosynthèse. Le modèle SALTMED a simulé le rendement en matière sèche et le rendement en grains pour les cinq accessio |
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ISSN: | 1531-0353 1531-0361 |
DOI: | 10.1002/ird.2116 |