Please use this identifier to cite or link to this item: http://dx.doi.org/10.14279/depositonce-12255
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Main Title: Modeling of Individual Fruit-Bearing Capacity of Trees Is Aimed at Optimizing Fruit Quality of Malus x domestica Borkh. ‘Gala’
Author(s): Penzel, Martin
Herppich, Werner B.
Weltzien, Cornelia
Tsoulias, Nikos
Zude-Sasse, Manuela
Type: Article
URI: https://depositonce.tu-berlin.de/handle/11303/13469
http://dx.doi.org/10.14279/depositonce-12255
License: https://creativecommons.org/licenses/by/4.0/
Abstract: The capacity of apple trees to produce fruit of a desired diameter, i.e., fruit-bearing capacity (FBC), was investigated by considering the inter-tree variability of leaf area (LA). The LA of 996 trees in a commercial apple orchard was measured by using a terrestrial two-dimensional (2D) light detection and ranging (LiDAR) laser scanner for two consecutive years. The FBC of the trees was simulated in a carbon balance model by utilizing the LiDAR-scanned total LA of the trees, seasonal records of fruit and leaf gas exchanges, fruit growth rates, and weather data. The FBC was compared to the actual fruit size measured in a sorting line on each individual tree. The variance of FBC was similar in both years, whereas each individual tree showed different FBC in both seasons as indicated in the spatially resolved data of FBC. Considering a target mean fruit diameter of 65 mm, FBC ranged from 84 to 168 fruit per tree in 2018 and from 55 to 179 fruit per tree in 2019 depending on the total LA of the trees. The simulated FBC to produce the mean harvest fruit diameter of 65 mm and the actual number of the harvested fruit >65 mm per tree were in good agreement. Fruit quality, indicated by fruit's size and soluble solids content (SSC), showed enhanced percentages of the desired fruit quality according to the seasonally total absorbed photosynthetic energy (TAPE) of the tree per fruit. To achieve a target fruit diameter and reduce the variance in SSC at harvest, the FBC should be considered in crop load management practices. However, achieving this purpose requires annual spatial monitoring of the individual FBC of trees.
Subject(s): apple
carbon balance
lidar
respiration
precision horticulture
growth
canopy photosynthesis model
Issue Date: 13-Jul-2021
Date Available: 2-Aug-2021
Language Code: en
DDC Class: 570 Biowissenschaften; Biologie
Sponsor/Funder: DFG, 414044773, Open Access Publizieren 2021 - 2022 / Technische Universität Berlin
Journal Title: Frontiers in Plant Science
Publisher: Frontiers
Volume: 12
Article Number: 669909
Publisher DOI: 10.3389/fpls.2021.669909
EISSN: 1664-462X
TU Affiliation(s): Fak. 5 Verkehrs- und Maschinensysteme » Inst. Maschinenkonstruktion und Systemtechnik » FG Agromechatronik
Appears in Collections:Technische Universität Berlin » Publications

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