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Articles

FIRST OBSERVATIONS ON PHYSIOLOGICAL EFFECTS OF IRRIGATION IN PISTACHIO

Article number
449_76
Pages
545 – 550
Language
Abstract
A research aimed at focusing the effects of different amount of irrigation water supply on net CO2 assimilation and related parameters has been undertaken on pistachio cv.
Larnaka in Southern Italy.
Four seasonal irrigation volumes restoring 0 – 25 – 50 and 75% ETc (0 – 1,500 – 3,000 – 4,500 m3 ha-1) were applied by drip irrigation.
From first results, all the ecophysiological parameters were influenced by irrigation, but to a different extent.
The stomatal conductance and transpiration rates were influenced by irrigation per se, while the assimilation rate and the related parameters were influenced by the irrigation level.
Stomatal conductance and transpiration rates were found significantly lower in nonirrigated trees; no difference was found among the other treatments.
The restoring of 50% ETc would seem to match the best results in net CO2 uptake per leaf area unit and per whole leaf, photosynthetic efficiency and water use efficiency.
No difference was found as concerns the vegetative traits of the shoots and the transpiration rate per whole leaf at different irrigation levels.

Publication
Authors
L. de Palma, V. Novello, F. Monastra
Keywords
Leaf gas exchange, photosynthetic efficiency, water use efficiency, irrigation level, ‘Larnaka’
Full text
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