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Accueil du site → Master → France → 2020 → Optimization of agricultural practices in the Bekaa plain in Lebanon by simulating scenarios using a calibrated CropSyst mechanized model

Institut Agronomique Méditerranéen de Montpellier - (IAMM-CIHEAM) 2020

Optimization of agricultural practices in the Bekaa plain in Lebanon by simulating scenarios using a calibrated CropSyst mechanized model

El Oualydy K.

Titre : Optimization of agricultural practices in the Bekaa plain in Lebanon by simulating scenarios using a calibrated CropSyst mechanized model

Auteur : El Oualydy K.

Etablissement de soutenance : Institut Agronomique Méditerranéen de Montpellier - (IAMM-CIHEAM)

Grade : Master 2. Gestion des territoires et développement local. 2020

Résumé
Our study aims to simulate scenarios depending on the type of soil (low and high water retention capacity WHC), the type of rotation (2/3 years), and different management amounts (fertilization and irrigation) in the crop growth model “CropSyst” , in order to increase yield, efficiency in nitrogen and water use and net profit. It appears from the results obtained that the wheat-potato rotation for the 2-year rotation and wheat-fallow-potato for the 3-year rotation are the most productive even with low efficiency in the use of resources (Nitrogen and water). Moreover, the wheat-fava bean rotation scenario seems to be a better substitute for the wheat-wheat rotation in terms of protein production. For a soil with a low water retention capacity WHC, the protein production is 1.1 t / ha and 0.9 t / ha respectively for the wheat-bean and wheat-wheat rotations. For a soil with high retention capacity, the protein production is 1.4 t / ha for wheat- fava bean against 1.8 t / ha for wheat-wheat. In addition, this wheat-fava bean cropping system could generate a higher net profit than the wheat-wheat one. Finally, the wheat-potato rotation can generate very high net benefits but with low input efficiency. On the other hand, in terms of wheat grain yield and protein production, the wheat-fallow rotation is the least productive rotation, and it has low net profit. For 3-year rotations, there is no significant difference between the different rotations regardless of the type of soil and management. wheat-fallow-bean rotations produce the highest amounts of protein, which range between 0.9 and 1.7 t / rotation / ha, followed by the wheat-fallow-potato, which range between 0.6 and 1.5 t / rotation / ha. The wheat-fallow-potato rotations in the different managements produce the lowest amount of protein, which is between 0.5 and 1.3 t / rotation / ha. However, the three rotations types show the same profitability in soil with low WHC but with a higher net benefit profitable in soil with high WHC.

Mots-clés : FERTILISATION ; MODELE DE SIMULATION ; RENDEMENT DES CULTURES ; AZOTE ; PRATIQUE AGRICOLE ; RESSOURCE EN EAU ; ROTATION CULTURALE ; LIBAN

Présentation (CIHEAM-IAMM)

Page publiée le 4 novembre 2021