1- Water Engineering Department, College of Aburaihan, University of Tehran, Tehran, Iran
2- Water Engineering Department, College of Aburaihan, University of Tehran, Tehran, Iran ,sehashemi@ut.ac.ir
3- Department of Horticultural Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
2- Water Engineering Department, College of Aburaihan, University of Tehran, Tehran, Iran ,
3- Department of Horticultural Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
Abstract: (401 Views)
This study investigated the effects of irrigation strategies including sustained deficit irrigation (SDI) and partial root-zone drying (PRD) on the growth, physiology, and photosynthesis of strawberry plants in order to maximize crop productivity while maintaining water resources. This experiment has four irrigation strategies (FI: control (full irrigation volume), PRD1 (full irrigation volume), PRD2 (50% of FI), and SDI (50% of FI) and two fertilizer strengths (EC1 and EC2) with four replicates per treatment. Gas exchange, leaf chlorophyll index, stomatal conductance (gs), and maximum quantum efficiency of PSII photochemistry (F'v/F'm) were assessed on three occasions throughout the experimental duration in order to monitor the impact of different irrigation strategies on photosynthesis. Yield water use efficiency, as well as TSS (total soluble solids) and TA (total titratable acidity), two fruit quality-related parameters, were also measured. In the final stage, PRD2-EC2 photosystem II efficiency was 9% higher than SDI-EC2. Also, the PRD strategy effectively influenced and regulated the adjustment of stomatal conductance (gs). In diluted fertilizer (EC2), yield WUE of PRD1 and SDI performed 15% and 30.7% lower than FI-EC2. However, PRD2-EC2 treatment increased 72.5% more than the control. Our observations of leaf and fruit deficiencies showed that the PRD strategy had long-term benefits for the plant and reduced water consumption. However, to establish a sustainable irrigation strategy, the nutrient solution must be adjusted to control growth and photosynthesis attributes.
Keywords: Chlorophyll Fluorescence, Deficit Irrigation, PSII Photochemistry Efficiency, Stomatal Conductance (gs).
Article Type: Original Research |
Subject:
Greenhouse Horticulture
Received: 2024/01/13 | Accepted: 2024/01/1
Received: 2024/01/13 | Accepted: 2024/01/1
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