Radiation Use and Irrigation Water Use Efficiency in Processing Tomato at Two Plant Densities Under Deficit Irrigation in a Mediterranean Climate (Articolo in rivista)

Type
Label
  • Radiation Use and Irrigation Water Use Efficiency in Processing Tomato at Two Plant Densities Under Deficit Irrigation in a Mediterranean Climate (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Alternative label
  • Patanè C.; La Rosa S.; Tringali S.; Scandurra S.; (2011)
    Radiation Use and Irrigation Water Use Efficiency in Processing Tomato at Two Plant Densities Under Deficit Irrigation in a Mediterranean Climate
    in Acta horticulturae
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Patanè C.; La Rosa S.; Tringali S.; Scandurra S.; (literal)
Pagina inizio
  • 169 (literal)
Pagina fine
  • 175 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni
  • Lavoro presentato all'Internation Horticultural Congress (IHC) di Lisbona, agosto 2011, ISHS (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 922 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Patanè C., CNR-ISAFOM La Rosa S., CNR-ISAFOM Tringali S., CNR-ISAFOM Scandurra Sebastiano, DISPA, Università degli Studi di Catania (literal)
Titolo
  • Radiation Use and Irrigation Water Use Efficiency in Processing Tomato at Two Plant Densities Under Deficit Irrigation in a Mediterranean Climate (literal)
Abstract
  • Radiation use efficiency (RUE) measures the efficiency of a crop to use radiant energy. It may be strongly affected by drought in arid and semi-arid areas. Deficit irrigation (DI) methods may improve crop water use efficiency (WUE) while maintaining high yields under soil water restriction. Research was carried out on processing tomato 'Brigade' in a typically Mediterranean environment, where the influence of reduced irrigation volumes at two plant densities (P1 and P2, 2.5 and 5 plants/m2, respectively) on RUE and Irrigation Water Use Efficiency (IWUE) was assessed. A severe stress (no irrigation) affected canopy development at both plant densities. Under DI (50% evapotranspiration ?ETc? restoration) the crop developed a leaf area index (LAI) similar to that under full irrigation (F, 100% ETc), at 5 plants/m2. The extinction coefficient (k value of the regression line of PAR intercepted vs. LAI) at 2.5 plants/m2 (P1) was 35% lower (0.703) than that at 5 plants/m2 (1.087). At the low plant density, RUE was negatively affected by the increasing soil water deficit, whilst at the high plant population (P2) RUE did not differ between D and F regimes. DI caused a minor fruit yield decrease (11 and 13%, in P1 and P2, respectively) but a great water saving (47%), as compared to conventional irrigation (F), confirming the validity of using this saving water strategy in semi-arid environments. Unlike RUE, WUE was greatly improved with DI, mostly at 5 plants/m2 density. In conclusion, DI at a 5 plants/m2 density may be beneficial for processing tomato in semi-arid environments, since the crop exhibits the same RUE as under well irrigated conditions, IWUE was improved, yield decrease was negligible and a water saving >40% was achieved. (literal)
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