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Investigating the application of modern irrigation systems and deficit irrigation methods on water use efficiency, reproductive and quality traits of orange fruit of early Mars variety
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Esmaeil Moghbeli   , Soheila Mohammadrezakhani , Rouhallah Fatahi |
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Abstract: (17 Views) |
In the current research, the impact of deficit irrigation and different irrigation methods (drip-surface and subsurface) on reproductive growth, fruit quantity, and water use efficiency of citrus fruits in southern Kerman region has been investigated. The experiment on early March oranges was carried out based on a randomized complete block design in a factorial format with two factors of deficit irrigation and irrigation method in three replications. The deficit -irrigation factor includes three levels (irrigation based on 100% of the plant water needs in all stages of plant growth (I100), irrigation based on 80% of the plant water needs from the beginning of fruit growth to fruit harvest (in the rest of the plant growth stages, irrigation with 100 The percentage of water requirement was done (I80), irrigation based on the irrigation frequency of 60-100% of the water requirement from the beginning of the fruit growth to the fruit harvest (in the rest of the plant growth stages, irrigation with 100% of the water requirement is I60-100) and different levels of irrigation method factors including (surface drip irrigation (DI), subsurface drip irrigation (SDI), deep subsurface irrigation (DSI)) were performed. In order to investigate the effect of these factors, reproductive characteristics (fruit length, fruit diameter, fruit weight, peel weight, pulp weight, fruit juice weight), fruit quality indicators (vitamin C, soluble solids, acidity and ripeness index), yield and water use efficiency was measured.
The investigation of the irrigation method on the measured characteristics showed that subsurface irrigation is better than surface drip irrigation in all characteristics. In traits of fruit length, fruit diameter, fruit weight and fruit pulp weight, deep subsurface irrigation was significantly better than subsurface drip irrigation. The comparison of the simple effect of deficit irrigation showed that there was a significant difference in the characteristics of fruit length, fruit diameter, fruit juice weight and maturity index, irrigation with 100% of water requirement with both types of deficit irrigation. Examining the deficit irrigation × methods of irrigation interaction effects compared to the simple effects of these two factors showed that had a significant effect on the measured traits. The highest positive correlation coefficients between reproductive traits and total yield were shown by fruit juice weight and fruit diameter traits.
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| Keywords: Irrigation system, Yield, Water use |
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Type of Study: Research |
Subject:
Pomology
Received: 2024/03/16 | Accepted: 2025/07/26 | Published: 2026/01/31
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