Kharrou M.H., Er-Raki S., Chehbouni A., Duchemin Benoît, Simonneaux Vincent, Le Page M., Ouzine L., Jarlan Lionel. (2011). Water use efficiency and yield of winter wheat under different irrigation regimes in a semi-arid region. Agricultural Sciences, 2 (3), p. 273-282. ISSN 2156-8561.
Titre du document
Water use efficiency and yield of winter wheat under different irrigation regimes in a semi-arid region
Année de publication
2011
Type de document
Article
Auteurs
Kharrou M.H., Er-Raki S., Chehbouni A., Duchemin Benoît, Simonneaux Vincent, Le Page M., Ouzine L., Jarlan Lionel
Source
Agricultural Sciences, 2011,
2 (3), p. 273-282 ISSN 2156-8561
In irrigation schemes under rotational water supply in semi-arid region, the water allocation and irrigation scheduling are often based on a fixed-area proportionate water depth with every irrigation cycle irrespective of crops and their growth stages, for an equitable water supply. An experiment was conducted during the 2004- 2005 season in Haouz irrigated area in Morocco, which objective was 1) to evaluate the effects of the surface irrigation scheduling method (ex-isting rule) adopted by the irrigation agency on winter wheat production compared to a full ir-rigation method and 2) to evaluate drip irrigation versus surface irrigation impacts on water sav-ing and yield of winter wheat. The methodology was based on the FAO-56 dual approach for the surface irrigation scheduling. Ground measure- ments of the Normalized Difference Vegetation Index (NDVI) were used to derive the basal crop coefficient and the vegetation fraction cover. The simple FAO-56 approach was used for drip irrigation scheduling. For surface irrigation, the existing rule approach resulted in yield and WUE reductions of 22% and 15%, respectively, compared with the optimized irrigation sched-uling proposed by the FAO-56 for full irrigation treatment. This revealed the negative effects of the irrigation schedules adopted in irrigation schemes under rotational water supply on crops productivity. It was also demonstrated that drip irrigation applied to wheat was more efficient with 20% of water saving in comparison with surface irrigation (full irrigation treatment). Drip irrigation gives also higher wheat yield com-pared to surface irrigation (+28% and +52% for full irrigation and existing rule treatments re-spectively). The same improvement was ob-served for water use efficiency (+24% and +59% respectively).
Plan de classement
Etude du besoin en eau des plantes (évopotranspirations de icients culturaux) [072AGRMET01]
;
Irrigation / Drainage [076AGRO09]
Descripteurs
CULTURE IRRIGUEE ; BLE ; PRODUCTION AGRICOLE ; IRRIGATION ; CALENDRIER CULTURAL ; ROTATION DES CULTURES ; EVAPOTRANSPIRATION ; RELATION SOL EAU ; MODELE MATHEMATIQUE ; ETUDE COMPARATIVE ; UTILISATION DE L'EAU ; IRRIGATION PAR ASPERSION ; IRRIGATION TRADITIONNELLE
