The relationship between the characteristics of the Earth in relation to the natural regeneration of forest planting (Case Study: Mellat Park OF Zanjan)

Vegetation is an important element in the forest. Study and understanding of the vegetation of the most urgent issues and research in the area of natural resources and the environment. Due to the proximity to urban parks and impress their quality of life is important. Park Forest regeneration is important, In this study, in order to maintain and develop forest regeneration has been. This study aimed to evaluate regeneration in relation to the slope, aspect and elevation has been made. Tsavfy systematic sampling was done using 35 plots of national park area of determination and characteristics to be measured in the plots. Initially, descriptive statistics indicators measured by use of the expression and then using parametric and nonparametric and ultimately affect the characteristics of the land on growth trees and predict growth trees with each other using Version SPSS 21 software was evaluated. The results of this study showed that the slope of the growth characteristics had no significant effect, But Ash slope height, diameter Ktlpa breast, breast diameter ash, the average diameter of the chest, the canopy of acacia, ash canopy, canopy and canopy average overall plot was significantly affected. The number of trees per plot on reproduction, and other characteristics as well as significant growth. Acacia at its height had a negative relationship between happiness