Volume 10, Issue 19 (5-2022)                   ifej 2022, 10(19): 9-21 | Back to browse issues page

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Jahanbazi H, Iranmanesh Y, Talebi M, Pourhashemi M. The Effect of Spray Solution of Nutrition Elements on the amount of Macro Elements on Healthy and Drought Oak Trees (Quercus brantii Lindl.) in Monj Region of Chaharmahal and Bakhtiari Province. ifej 2022; 10 (19) :9-21
URL: http://ifej.sanru.ac.ir/article-1-402-en.html
Agricultural Research, Education and Extension Organization (AREEO)
Abstract:   (463 Views)
Extended Abstract
Introduction and Objective: Zagros forests are one of the most important vegetation areas in Iran that play an important role in protecting water and soil resources. Over the past decade, the decline of some tree species in these forests, including oak, has raised serious concerns about the endangerment of these forests. Climate change, site poverty, absorption of heavy metals from dust, reduced nutrient uptake and site factors are an important factor of this phenomenon. The present study was carried out to investigate the effect of nutrition spraying on controlling the drying process of oak trees (Quercus brantii Lindl.) and compensating their needs through foliar application.
Material and Methods: This research was carried out in Monj region of Lordegan city in Chaharmahal and Bakhtiari province. Thirty oak trees (including 15 coppice and 15 Single stem trees) were selected in one of the areas with drought. Trees in each vegetative form were divided into three health classes including healthy, diback and drought up to 50% of the crown. In total, this study had three treatments including vegetative form (two levels), health (three levels), sampling time (two levels) and five replications. Foliar spraying (three per thousand) was carried out during the full growth of leaves from early June to July with an interval of 10 days in three shifts.
Results: The results showed that the amount of high macronutrient elements including potassium, phosphorus and nitrogen at the beginning of the growing season were 1.22, 0.27 and 0.998 percent, against the end of the growing season that were 0.17, 0.24 and 1.11 percent, respectively, that was a significant difference at the level of 95% confidence. The amount of these elements in coppice and Single stem trees in healthy trees was more than two classes of drought, but this difference was not significant statistically.
Conclusion: In general, macronutrients can stop the decay of oak trees by increasing the ability of trees to withstand environmental stresses. In between, the role of phosphorus and potassium was important in increasing the resistance of trees to environmental stresses and stopping the drying process.
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Type of Study: Research | Subject: اکولوژی جنگل
Received: 2020/10/10 | Accepted: 2021/03/1 | Published: 2022/06/13

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