Responses of vegetative growth and fruit yield to winter and summer mechanical pruning in olive trees

Mechanical pruning has become increasingly common in olive orchards, particularly under high tree densities. Large cutting disks make heading cuts at a single canopy depth without discriminating between branch thickness, size, or type of branch. The objectives of this study were to: (i) quantify the...

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Detalles Bibliográficos
Otros Autores: Albarracín, Valeria, Hall, Antonio Juan, Searles, Peter Stoughton, Rousseaux, María Cecilia
Formato: Artículo
Lenguaje:Inglés
Materias:
FRUIT DRY WEIGHT
LEAF CONDUCTANCE
OIL CONTENT
PHOTOSYNTHETIC RATE
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2017albarracin.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
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245 1 |a Responses of vegetative growth and fruit yield to winter and summer mechanical pruning in olive trees 
520 |a Mechanical pruning has become increasingly common in olive orchards, particularly under high tree densities. Large cutting disks make heading cuts at a single canopy depth without discriminating between branch thickness, size, or type of branch. The objectives of this study were to: (i) quantify the responses of vegetative growth over two growing seasons and yield components over three seasons following different intensities and moments of application of mechanical pruning; and (ii) evaluate some leaf morphology and gas-exchange characteristics of the remaining leaves after pruning. Five ear-old olive trees with high crop load (cv. Arbequina) were pruned towards the end of the winter (W) or early summer (S). Three intensities of winter pruning representing different distances (0.25, 0.50, 0.75 m) from the outer canopy surface were applied, while there was only a single summer pruning treatment (0.75 m). The vegetative growth variables measured after pruning included new branch number and length, new leaf number, and increase in trunk cross sectional area. Reproductive variables included fruit and oil yield, fruit number, fruit weight, and oil content per fruit. Growth of new branches increased significantly with winter pruning intensity while delaying pruning to early summer reduced regrowth to the level of the unpruned control. Despite differences in yield in individual years between the unpruned control and the winter pruning treatments, the average yield over the three years after the winter pruning event was similar between all trees. Delaying the intense pruning to summer was associated with some reduction in yield, and moderate winter pruning (0.50 m) appeared to partially reduce alternate bearing. When measured shortly after winter pruning, specific leaf mass of the remaining leaves decreased steadily as the level of winter pruning increased, which is consistent with prior shading within the tree. The leaf net photosynthetic rate per unit mass was also different between pruning treatments. In conclusion, our results contribute to filling the gaps in knowledge related to important aspects of olive tree responses to the intensity and timing of mechanical pruning. 
650 |2 Agrovoc  |9 26 
653 |a FRUIT DRY WEIGHT 
653 |a LEAF CONDUCTANCE 
653 |a OIL CONTENT 
653 |a PHOTOSYNTHETIC RATE 
700 1 |a Albarracín, Valeria  |u Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR-Provincia de La Rioja-UNLaR- SEGEMAR- UNCa-CONICET), Entre Ríos y Mendoza s/n, Anillaco (5301), La Rioja, Argentina b  |9 42644 
700 1 |9 24024  |a Hall, Antonio Juan 
700 1 |9 38386  |a Searles, Peter Stoughton  |u Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR-Provincia de La Rioja-UNLaR- SEGEMAR- UNCa-CONICET), Entre Ríos y Mendoza s/n, Anillaco (5301), La Rioja, Argentina b 
700 |9 7428  |a Rousseaux, María Cecilia  |u Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR-Provincia de La Rioja-UNLaR- SEGEMAR- UNCa-CONICET), Entre Ríos y Mendoza s/n, Anillaco (5301), La Rioja, Argentina b. Email: crousseaux@crilar-conicet.gob.ar 
773 0 |t Scientia Horticulturae  |g Vol.225, (2017), p. 185–194, grafs., tbls. 
856 |f 2017albarracin  |u http://ri.agro.uba.ar/files/intranet/articulo/2017albarracin.pdf  |i en reservorio  |x ARTI201805  |q application/pdf 
856 |u https://www.elsevier.com/  |z LINK AL EDITOR 
942 |c ARTICULO 
942 |c ENLINEA 
976 |a AAG 

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