Articles
Correlation between daily trunk diameter oscillations, weather variables, and soil matric potential for ‘Redhaven’ peach tree grown in a temperate climate
Article number
1457_66
Pages
529 – 540
Language
English
Abstract
The objective of this work was to analyze the strength of relationships between trunk daily growth (DG), maximum daily shrinkage (MDS), some weather and soil variables (air temperature, relative humidity (RH), precipitation (P), global solar radiation (GSR), vapor pressure deficit (VPD), and reference evapotranspiration (ETo) and soil water matric potential (SMP)) for two soil depths in peach (Prunus persica (L.) Batsch) trees grown on medium-textured soils under continental-temperate climate conditions in non-irrigated regime.
The study was carried out in a 5-year-old peach tree orchard with the ‘Redhaven’ cultivar grafted on ‘Adaptabil’ semi-dwarf rootstock.
Hourly micrometric trunk diameter fluctuations of two trees were automatically determined by DEX 100 Dynamax dendrometers, and SMP was continuously monitored with resistance blocks installed at two depths: 0.2 and 0.4 m during six (2017-2022) growing seasons (V-X months). DG was significantly negatively influenced by MDS in all months of the year.
Analyzing the intensity of the dependencies through the Pearson correlation coefficients, it was established that DG was positively influenced by the high values of P mostly in August, but also in May, July, and September, and by RH, especially in the May-September interval.
The MDS was negatively influenced by high RH, mostly in the first and the last two months of the analyzed period.
Frequently, GSR and VPDmax appeared to have a stronger negative effect on DG compared to other weather and SMP indicators, while GSR was the main responsible factor for increasing peach MDS (and therefore water stress), followed in May, September, and October by VPDmax.
The relationships obtained may be used to monitor and early diagnose peach tree water stress.
The study was carried out in a 5-year-old peach tree orchard with the ‘Redhaven’ cultivar grafted on ‘Adaptabil’ semi-dwarf rootstock.
Hourly micrometric trunk diameter fluctuations of two trees were automatically determined by DEX 100 Dynamax dendrometers, and SMP was continuously monitored with resistance blocks installed at two depths: 0.2 and 0.4 m during six (2017-2022) growing seasons (V-X months). DG was significantly negatively influenced by MDS in all months of the year.
Analyzing the intensity of the dependencies through the Pearson correlation coefficients, it was established that DG was positively influenced by the high values of P mostly in August, but also in May, July, and September, and by RH, especially in the May-September interval.
The MDS was negatively influenced by high RH, mostly in the first and the last two months of the analyzed period.
Frequently, GSR and VPDmax appeared to have a stronger negative effect on DG compared to other weather and SMP indicators, while GSR was the main responsible factor for increasing peach MDS (and therefore water stress), followed in May, September, and October by VPDmax.
The relationships obtained may be used to monitor and early diagnose peach tree water stress.
Publication
Authors
C. Paltineanu, M. Calinescu, C. Paltineanu, I. Mazilu, F. Plaiasu
Keywords
Prunus persica (L.) Batsch, soil water stress, vapor pressure deficit, daily trunk growth, maximum daily shrinkage
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