|Authors: ||L.N. Podestá, R.C. Vallone, J.A. Morábito, E.E. Sánchez|
|Keywords: ||Prunus avium L., deficit irrigation, stem water potential, vegetative growth, flower bud, yield|
Different post-harvest regulated deficit irrigation treatments were established in a young and vigorous commercial ‘Bing’ cherry (Prunus avium L.) orchard planted in dry shallow soil with drip irrigation.
The treatments given over a three-year period were as follows: T1= 100%, T2= 75% and T3= 50% of full ETc.
The available water remaining percentage (%AWr) and midday stem water potential (SWP) were measured during the water-deficit period.
During the three-year period average SWP was -0.68, -0.83 and -1.04 MPa while %AWr was 89.9, 71.7 and 41.4 for T1, T2 and T3 respectively.
SWP was highly correlated with %AWr (r2= 0.89). After three years trunk growth decreased by 6% (T2) and 10% (T3). Shoot length for T3 was 27% lower, flower bud density and yield efficiency were 85% and 57% higher when compared to T1. Seasonal shoot length was highly correlated with flower bud density on productive branches (r2= -0.76). Average fruit weight was not affected while double fruits were not substantially affected by treatments.
An accurately adjusted post-harvest water deficit can be used to control vigor and promote early production of cherries, while saving significant amounts of water.
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