Document Type : Research
Authors
1
Assistant Professor, National Salinity Research Center, Agricultural Research, Education and Extension Organization (AREEO), Yazd, Iran
2
Associate Professor, Research Institute of Forests and Rangelands Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran
3
Associate Professor, Research Division of Natural Resources, Yazd Agricultural and Natural Resource Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Yazd, Iran
4
Resarcher, National Salinity Research Center, Agricultural Research, Education and Extension Organization (AREEO), Yazd, Iran
10.22092/rhsj.2025.366350.1101
Abstract
ITherefore, this research aimed to identify provenances of Populus euphratica Oliv tolerant to salinity in comparison with the hybrid Mofid (P. euphratica x P. alba), using a split plot experiment based on randomized complete block design (RCBD). Variables included the main factor i.e. salinity at 4 levels, and the secondary factor of Populus euphratica Oliv provenances at 7 levels. The study was performed with 3 replications during 2023-2024 at Hosein Abad Station of the National Salinity Research Center. Irrigation water salinity levels included (2.8, 6, 10 and 14 dS/m) and the provenances included 1) hybrid Mofid (P. euphratica x P. alba), 2) P. alba 3) Dezfoul, 4) Zabol, 5) Gotvand, 6) Lorestan, and 7) Hamidiyeh. All the studied provenances tolerated salinity level of 6 dS/m except for P. alba, but with increase in salinity, all the growth characteristics in some of the studied provenances decreased. At 10 and 14 dS/m, total height, total diameter, breast-high diameter, and their increase during the growing season, necrosis percentage and relative water content of leaves in the provenances of gotvand and Hamidiyeh and hybrid Mofid significantly decreased compared to the control trees. However, sodium content, sodium to potassium ratio and relative ion leakage of leaves increased significantly compared to the control. A significant decrease in the investigated growth traits was observed in Dezfoul provenance only at the salinity level of 14 dS/m compared to the control. These results indicate that this provenance was able to tolerate salinity of 10 dS/m by maintaining its growth characteristics and increasing potassium uptake against sodium. hybrid Mofid could well tolerate salinity of 6 dS/m like Gotvand and Hamidiyeh provenances. The growth characteristics of hybrid Mofid including total height, total diameter, breast-high diameter was reduced 81.87%, 65.60% and 65.65% compared to control trees at salinity of 10 dS/m, respectively.
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