MONITORING WATER-USE EFFICIENCY IN A STRESSED CORN FIELD (Abstract/Poster in convegno)

Type
Label
  • MONITORING WATER-USE EFFICIENCY IN A STRESSED CORN FIELD (Abstract/Poster in convegno) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Alternative label
  • M. Palladino1, R. De Mascellis2, A. Basile2, G. D'Urso1 (2008)
    MONITORING WATER-USE EFFICIENCY IN A STRESSED CORN FIELD
    in "IRRIGATION IN MEDITERRANEAN AGRICULTURE: CHALLENGES AND INNOVATION FOR THE NEXT DECADES", Napoli (Italy), 17-18 june 2008
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • M. Palladino1, R. De Mascellis2, A. Basile2, G. D'Urso1 (literal)
Note
  • Poster (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1. Dept. Agricultural Engineering and Agronomy, University of Naples Federico II, Via Università 100, 80055, Portici (NA), Italy. 2. C.N.R. Isafom, Via Cupa Patacca 85, 80056, Ercolano (NA), Italy. (literal)
Titolo
  • MONITORING WATER-USE EFFICIENCY IN A STRESSED CORN FIELD (literal)
Abstract
  • Improving water-use efficiency (WUE) is an accepted approach for irrigation water saving and proper irrigation scheduling. In scientific literature different definitions related to agricultural WUE are found, by which: irrigation efficiency, water application efficiency, irrigation WUE, evapotranspiration WUE, and others. Usually the efficiency term is expressed by a ratio in which the numerator is represented by actual evapotranspiration (ET) or yield (Y) and the denominator is represented by applied irrigation water, including or not precipitations. The main problem to face with to determine WUE is linked to the quantification of actual evapotranspiration fluxes. An approach that can help in this issue is represented by the combination of agro-hydrological models with Earth Observation (EO) techniques. This approach provide accurate quantitative information on actual fluxes of ET, in this way improving crop water use efficiency and the evolution of soil water status, i.e. to optimize irrigation scheduling. This work summarize two years of experiments hold in the experimental farm \"Improsta\", located in the right part of Sele river plain, in the province of Salerno. The farm is equipped with a standard meteorological station, with automatic acquisition of hourly values of air temperature and humidity, wind speed and direction, incoming solar radiation (Class A piranometers). The experimental field had an extension of 3.6 ha. The field was cultivated with corn (early June seeding) and irrigated by means of a mobile gun. Soil mechanical and hydraulic properties have been determined with Wind evaporation method. Two sets of TDR probes were installed horizontally at different depths (up to 150 cm) in two profiles in the experimental parcel. Two sets of tensiometers (up to a depth of 150 cm) have been installed, each one equipped with a digital transducer. During the two-years study, corn was grown under different irrigation treatments: for both years adequate water, and water deficit periods during vegetative growth were applied. With the data collected a validation procedure of a hydrological model has been accomplished by comparing simulated and observed actual ET and/or soil water status. Finally, WUE has been calculated. Results show that the presence of a shallow ground-water, usually not considered by the farmers, can improve dramatically irrigation WUE. (literal)
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