Articles
EVALUATION OF ALMOND (AMYGDALUS COMMUNIS L.) SEASONAL SENSITIVITY TO WATER STRESS. PHYSIOLOGICAL AND YIELD RESPONSES
Article number
449_68
Pages
489 – 496
Language
Abstract
In a commercial almond (cv "Marcona") plot the effect of stopping irrigation water on different annual phases is analyzed.
Five irrigation treatments were applied (Control: irrigation through out of the season; T-1: to cutoff irrigation from March 15 to May 15; T-2: to cutoff irrigation from May 15 to June 15; T-3: to cutoff irrigation from June 15 to August 1st; T-4: to cutoff irrigation from August 1st to harvest (≈ September 15th). T-2 and T-3 showed the highest sensitivity to lack of water in all of the experiment seasons, while T-1 showed a very extreme sensitivity to water deficit, but only years without rainfall during winter and spring time.
The effects of irrigation cutoff have been analyzed based on tree water status (predawn leaf water potential); leaf gas exchange (stomatal conductance and photosynthesis); vegetative growth (trunk circumference); seasonal patterns of fruit growth (fresh and dry weights of fruit and kernel); yield and its components.
Five irrigation treatments were applied (Control: irrigation through out of the season; T-1: to cutoff irrigation from March 15 to May 15; T-2: to cutoff irrigation from May 15 to June 15; T-3: to cutoff irrigation from June 15 to August 1st; T-4: to cutoff irrigation from August 1st to harvest (≈ September 15th). T-2 and T-3 showed the highest sensitivity to lack of water in all of the experiment seasons, while T-1 showed a very extreme sensitivity to water deficit, but only years without rainfall during winter and spring time.
The effects of irrigation cutoff have been analyzed based on tree water status (predawn leaf water potential); leaf gas exchange (stomatal conductance and photosynthesis); vegetative growth (trunk circumference); seasonal patterns of fruit growth (fresh and dry weights of fruit and kernel); yield and its components.
Authors
J. Girona, J. Marsal, M. Mata, A. Arbonés, C. Miravete
Keywords
Almond, irrigation, fruit growth, water deprivation, leaf water potential, stomatal conductance, photosynthesis
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