Effects of Different Crop Loads on Physiological, Yield and Fruit Quality of ‘Joya (TM)’ Apple Trees: High Crop Load Decreases Maximum Daily Trunk Diameter and Does Not Affect Stem Water Potential

Autor: Ersin Atay, Déborah Loubet, Pierre-Eric Lauri, Xavier Crété
Přispěvatelé: Burdur Mehmet Akif Ersoy University, Partenaires INRAE, Agrosystèmes Biodiversifiés (UMR ABSys), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Centre International de Hautes Etudes Agronomiques Méditerranéennes - Institut Agronomique Méditerranéen de Montpellier (CIHEAM-IAMM), Centre International de Hautes Études Agronomiques Méditerranéennes (CIHEAM)-Centre International de Hautes Études Agronomiques Méditerranéennes (CIHEAM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Station de Recherche Appliquée Fruits et Légumes (SudExpé), This work has been partly funded by the ARIMNET (Coordination of the Agricultural Research in the Mediterranean Area) research program APMed (Apple and Peach in Mediterranean orchards - Integrating tree water status and irrigation management for coping with water scarcity and aphid control), and TÜBİTAK (The Scientific and Technological Research Council of Turkey)., ANR-12-AGRI-0001,APMed,Le verger de pommier et de pêcher en zone méditerranéenne - Etat hydrique de l'arbre et stratégies d'irrigation pour remédier au manque d'eau et comme moyen de contôle des infestations par le puceron(2012)
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: International Journal of Fruit Science
International Journal of Fruit Science, Taylor & Francis, 2021, 21 (1), pp.955-969. ⟨10.1080/15538362.2021.1951922⟩
ISSN: 1553-8362
1553-8621
Popis: International audience; This study aimed to evaluate the effects of different crop load levels on apple trees' yield and physiological characteristics, emphasizing the relationship between stem water potential and crop load and the link between trunk diameter growth and crop load. It was conducted in 2014 at Station Expérimentale Fruits et Légumes (SUDEXPE-CEHM) in Southern France. The 'Joya TM ' apple on Pajam-1 rootstock was used as the plant material. Trees were subjected to hand thinning to obtain four final crop load levels as high (100%; 10 fruit/cm 2 of branch cross-sectional area (BCSA)), medium-high (75%; 7.5 fruit/cm 2 of BCSA), medium-low (50%; 5 fruit/cm 2 of BCSA) and low (25%; 2.5 fruit/cm 2 of BCSA). The four crop load levels were set up in a randomized block design with four replications, and each plot was formed of five uniform trees. Stem water potential was weakly affected by crop load but was mainly driven by vapor pressure deficit. The maximum daily trunk diameter, by and large, reduced while crop load level increased. The increase in crop load level was negatively related to fruit size, acidity and soluble solids content. Crop load did not affect bitter pit incidence. However, in parallel to the increasing crop load level, cumulative yield, yield efficiency and water productivity increased.
Databáze: OpenAIRE
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