A comparison of the stability of Italian cypress (Cupressus sempervirense var. horizontalis) and Brutia Pine (Pinus brutia Ten) plantations in Ramian, Golestan Province of Iran

Subject Areas : natural resorces

Aynaz Charkazi ¹ (M.Sc. of Silviculture and Forest Ecology, Faculty of Desert Studies, Semnan University, Semnan, Iran.)
Mojtaba Amiri ² (Asisstant of professor, Faculty of Natural Resources, Semnan University, Semnan, Iran.)
Homan Ravanbakhsh ³ (Assistant Prof., Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran.)
داوود مقدسی ⁴ (کارشناس ارشد اداره کل منابع طبیعی و آبخیزداری استان گلستان)

Received: 2016-10-26 Accepted : 2016-12-28 Published : 2022-01-21

Keywords: Cupressus sempervirens, Pinus brutia, Tree slenderness coefficient, Ramian City, Reforestation,

Abstract :

Background and Objective: Tree slenderness coefficient (The ratio of total height to diameter at breast height) is one of the most important indicators of tree stability against the wind and shows the environmental properties of the forest sites therefore it will be a good guide for silvicultural operation. The aim of this study is analyzing and surveying of elongation coefficient for the species of Cypress and Brutia Pine in Ramian forest plantations.Material and Methodology: after the primary assessment of the region and selecting the intended forest stands including Cypress and Brutia Pine, four plots of one hectare (100×100 m) were determined in each stand. Then on hectare divided to 4 plot 2500m2. In each plot quantitative parameters of trees including diameter and total height were measured. To study the stability of cypress and pine plantations, Burschel & Huss stability indexes were used. Independent t test was applied to compare the quantitative parameters of species.Finding: According to the results, there was a decreasing relationship between diameter and elongation coefficient as when the diameter is increased, the total height will be decreased and resulted in more stability of the trees. In this research, the least amount of elongation coefficient was for Pinus brutia (59.4%) and the highest amount was for Cupressus sempervirens (68.4%). According to, Burschel & Huss stability indexes, P. brutia was more stable than the other species because of the less slenderness ratio.Discussion and Conclusion: In general, it can be concluded that P. brutia is more successful species than C. sempervirense for afforestation in Ramian and similar regions. To improve the stability of cypress stands, scheduled and appropriated silvicultural operation is suggested. 

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