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Istituto Agronomico Mediterraneo di Bari (IAMB) 2005

Deficit irrigation of sunflower under Mediterranean environmental conditions : on-field experiment and modelling application

Zivotic, Ljubomir

Titre : Deficit irrigation of sunflower under Mediterranean environmental conditions : on-field experiment and modelling application

Auteur : Zivotic, Ljubomir

Etablissement de soutenance : Istituto Agronomico Mediterraneo di Bari (IAMB) - Centre international de hautes études agronomiques méditerranéennes (CIHEAM)

Diplôme : Master of science : Land and water resource management : irrigated agriculture 2005

Résumé
This work aims at : (i) analysing crop response of sunflower to several irrigation water regimes ; (ii) evaluating the suitability of sunflower to deficit irrigation strategies ; (iii) investigating the applicability of CropSyst and WOFOST models in simulation of sunflower growth. A field experiment on hybrid Sanbro_MR was carried out at Valenzano (Bari, Italy). The experiment includes five irrigation regimes : optimal water supply, application of 100% of water requirements up to flowering and 70% thereafter, application of 70% of water requirements through the whole season, application of 70% of water requirements up to flowering and rainfed conditions thereafter, and rainfed conditions during the whole season. Measurements comprise leaf area index, radiation interception, biomass and yield. The overall results indicate deficit irrigation as an acceptable strategy for sunflower highlighting the importance of irrigation between flowering and maturity. Crop growth models provide similar results emphasising the necessity for re-calibration when deficit irrigation strategies are modelled.

Mots-clés : SUNFLOWERS WATER AVAILABILITY PLANT WATER RELATIONS MATHEMATICAL MODELS WATER USE EFFICIENCY

Présentation (IAMB Library)

Page publiée le 14 juin 2014, mise à jour le 12 septembre 2018