Desert Ecosystem Engineering

Desert Ecosystem Engineering

Increasing Performance and Production of Mentha spicata Essential Oil by Using One Strain of (PGPR) and Green Manure in the Central Region of Iran

Document Type : Original Article

Authors
Reza Dehghani Bidgoli 1
Mohammad Pessarakli 2
1 Associate Professor, Department of Nature Engineering, University of Kashan, Iran
2 , School of Plant Science, The University of Arizona, Tucson, AZ, 85621 USA
‎10.22052/deej.2025.257603.1118
Abstract
This experiment was conducted in 2024 as a split-plot factorial arranged in a randomized complete block design (RCBD) with three replications. The treatments consisted of PGPR fertilizer at four levels (0, 50, 100, and 150 g/ha) as the main plot factor, and two types of green manure-Medicago sativa L. and Trifolium alexandrinum L.-each with two application states (use and non-use) as the sub-plot factors. The green manure crops were cultivated in September 2023 and incorporated into the soil by ploughing in the fall of 2024. The highest increases in Mentha essential oil percentage and yield were observed in the following treatments: the application of 150 g/ha PGPR (0.35% and 4.560 kg/ha), the use of Medicago sativa L. (0.43% and 5.580 kg/ha), and the use of Trifolium alexandrinum L. (0.44% and 4.950 kg/ha), respectively. Furthermore, the highest essential oil percentage and yield resulted from the two-way interaction between 150 g/ha PGPR and Medicago sativa L. green manure, with averages of 0.62% and 8.030 kg/ha, respectively. The three-way interaction of the experimental factors revealed that the combined application of 150 g/ha PGPR with both Medicago sativa L. and Trifolium alexandrinum L. green manures produced the highest values, with an average essential oil percentage of 0.73% and a yield of 9.165 kg/ha.
Keywords
Fertilizer
Medicinal plants
Essential oil
Medicago sativa
Trifolium
Subjects
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Desert Ecosystem Engineering
Volume 14, Issue 47
Summer 2025
Pages 57-64