نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانش آموخته کارشناسی ارشد دانشگاه لرستان
2 استادیار دانشگاه لرستان
3 دانشجوی دکتری دانشگاه تهران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Tree plantations not only alter aboveground vegetation but also lead to significant changes in the physical and chemical properties of soils. Foresters have always relied on a knowledge of chemical and physical properties of soils to evaluate capacity of sites to support productive forests. The purpose of the present study was to investigate flora and plant species diversity in a tree plantation. To achieve this purpose, 20-year old soft and hardwood plantations (Pinus brutia Ten,Cupressus arizonica Green. and Amygdalus scoparia Spach.) were selected in Reymaleh region, Lorestan province. In each site, 10 plots of 100 m2 (10 ×10 m), totally 30 plots, were randomly selected and then 5 subplots (2.5 ×2.5 m) were located in the center and 4 corners of each (n=150). Composite soil samplings were made at 0-30 cm depth in each plot. The results indicated that there was significant difference among stands regarding organic carbon (%) and potassium (p=0.01) as well as total nitrogen (p=0.05). The highest organic carbon (%), potassium, and total nitrogen content were observed in Amygdalus scoparia and Cupressus arizonica stands, respectively. There was no significant difference among these stands with regard to pH, bulk density, and phosphorous content.
کلیدواژهها [English]