Influences of girdling and potassium treatments on fruit quality and some physiological characters of ‘Fremont’ mandarin variety

IF 2.2 4区 农林科学 Q2 HORTICULTURE
Tuğba Ülker, M. Kamiloğlu
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引用次数: 3

Abstract

Abstract Growing citrus involves cultural treatments such as girdling and foliar potassium treatment to increase fruit size, yield and quality. The aim of the study was to evaluate the effects of single and double stem girdling, potassium nitrate (KNO3) treatment on leaves and combinations of these treatments on the fruit yield, size and quality characteristics, leaf chlorophyll concentration and leaf nitrogen content, leaf fluorescence (PSII) and leaf sugar content of the ‘Fremont’ mandarin variety. Girdling treatments were applied on the stem by removing 4 mm wide ring of bark at the end of anthesis and after the June fruit drop. Foliar KNO3 applications were applied at a concentration of 4% twice (90 days and 120 days after full anthesis) in the experiment. The single girdling (SG) and double girdling (DG) treatments on stems increased fruit yield (kg · tree−1) by approximately 40% relative to the control (C). Treatments did not significantly affect the internal fruit quality of the ‘Fremont’ mandarin variety except in fruit colour and appearance. The highest impact on fruit size was found in the DG + KNO3 treatment. According to treatments and periods, the SPAD values varied between 62.08 and 70.67, whereas the PSII values varied between 0.698 and 0.756. The treatments significantly increased the leaf nitrogen (N) concentration and the fructose, glucose and sucrose concentrations relative to the control. The highest N concentration content was detected in the foliar potassium treatment, and the highest total sugar content was detected in the SG treatment.
环剥和钾肥处理对‘弗里蒙特’柑橘果实品质及某些生理特性的影响
摘要种植柑橘需要进行环剥和叶面钾处理等栽培处理,以增加果实大小、产量和质量。本研究的目的是评估单茎和双茎环剥、硝酸钾(KNO3)对叶片的处理以及这些处理的组合对“Fremont”柑橘品种的产量、大小和质量特征、叶片叶绿素浓度和叶片氮含量、叶片荧光(PSII)和叶糖含量的影响。在开花末期和六月落果后,通过去除4mm宽的树皮环对茎进行围带处理。在实验中,以4%的浓度施用叶面KNO3两次(开花后90天和120天)。茎上单环剥(SG)和双环剥(DG)处理的果实产量(kg·tree−1)比对照(C)增加了约40%。除果实颜色和外观外,处理对“弗里蒙特”柑橘品种的内部果实质量没有显著影响。DG+KNO3处理对果实大小的影响最大。根据处理和周期,SPAD值在62.08和70.67之间变化,而PSII值在0.698和0.756之间变化。与对照相比,处理显著提高了叶片氮浓度以及果糖、葡萄糖和蔗糖浓度。叶面钾处理的N浓度含量最高,SG处理的总糖含量最高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Folia Horticulturae
Folia Horticulturae Agricultural and Biological Sciences-Horticulture
CiteScore
3.40
自引率
0.00%
发文量
13
审稿时长
16 weeks
期刊介绍: Folia Horticulturae is an international, scientific journal published in English. It covers a broad research spectrum of aspects related to horticultural science that are of interest to a wide scientific community and have an impact on progress in both basic and applied research carried out with the use of horticultural crops and their products. The journal’s aim is to disseminate recent findings and serve as a forum for presenting views as well as for discussing important problems and prospects of modern horticulture, particularly in relation to sustainable production of high yield and quality of horticultural products, including their impact on human health.
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