Mr. Masoud Naderi Varandi, Dr. Ali Kialashaki, Dr. Ramin Veisy, Dr. Ali Sheykheslami,
Volume 6, Issue 12 (12-2018)
Abstract
In order to study the effect of altitude on some quantitative and qualitative characteristic of Populus deltoides in Mazandaran province, three sites were selected with elevations between 150 and 1200 m above sea level in Sari city. In each site, some tree traits such as diameter at breast height, total height, basal area, volume, form factor and qualitative variables including trunk health, crown shape and trunk form were measured and evaluated and quantitative and qualitative characteristics of trees in three sites were compared using one-way ANOVA and Kruskal Wallis tests. Results showed that the altitude had significant effects on qualitative and quantitative characteristics of Populus deltoides trees and trees in lower altitude ranges (150-300 m) had a higher diameter and volume growth than trees in higher altitudes. According to results, the highest diameter (27.83 cm), height (21.13 m), basal area (0.046 m2), volume (2.11 m3) and the highest number of trees with cylindrical trunks were observed in Mahdasht. Tress in Pahnekola had the highest form factor (0.99) and with symmetrical crowns. According to results of this study, it can be concluded that planting with Populus deltoides trees in lower altitude ranges can increase the qualitative and quantitative characteristics of such trees and provides a suitable approach for supplying wood for wood-based industries.
Dr. Masoud Naderi, Dr. Ali Kialashaki, Dr. Ramin Veisi, Dr. Ali Sheykheslami, Dr. Mahya Tafazoli,
Volume 9, Issue 18 (9-2021)
Abstract
Introduction and objective: Climate change and global warming is one of the major challenges in the context of sustainable development, which is due to increasing concentrations of greenhouse gases, especially carbon dioxide. Afforestation is one of the practical and simple ways to reduce atmospheric carbon dioxide and increase carbon uptake in the soil. Therefore, the purpose of this study was to investigate the trend of soil carbon sequestration in Populus deltoides plantation located on different elevation classes.
Materials and methods: Three sites (Mahdasht, Pahnekola and NaghibdehMazde) were selected at elevations between 150 to 1200 m in Sari city. Quantitative variables including diameter at breast height, total height, basal area of all trees with a diameter more than 7.5 cm were recorded (full inventory method). Ten soil samples were taken at a depth of 0-10 cm in each site using the core method in order to study soil physical (moisture, texture and bulk density) and chemical properties (pH, EC, nitrogen, phosphorus, potassium and organic carbon).
Results: The highest diameter (27.83 cm), height (21.13 m), basal area (0.046 m2) and volume (2.11 m3) was observed in Mahdasht and the lowest values were observed in Pahnekola. The lowest amount of pH (6.26±0.04), EC (0.3±0.01 ds/m), total nitrogen (0.11±0.01 %), potassium (169.49±25.00 mg/kg) and organic carbon (1.43±0.06 %) were observed in NaghibdehMazde (highest altitude). The highest and lowest rate of carbon sequestration was observed in Mahdasht (lowest altitude) and NaghibdehMazde (highest altitude), respectively. In general, in lower altitudes, poplar trees had a much better diameter growth than higher altitudes.
Conclusion: According to results, it can be stated that planting Populus deltoides in lower altitudes can be a suitable approach to reduce the concentration of atmospheric carbon dioxid.
