بررسی اثر کودهای مختلف شیمیایی و دامی بر رشد سه گونه نهال جنگلی در نهالستان های مرتفع و مقایسه رشد آنها پس از انتقال به عرصه

At this research plan, effect of different treatments of chemical and manure fertilizers on growth of forest species seedlings at a high altitude nursery, was investigated. The fertilizers consist of N., P., K., microelements and cow manure. The trial was conducted under the completely randomized blocks for each species, with three replicate and 14 fertilizer treatments. The seedlings were growth at Klardasht Nursery at altitude of 1250m. above sea level. The forest species (Fraxinus rotundifolia, Acer cappadocicum and A. velutinum) were planted and their growth parameters (height and diameter) were measured at the nursery at two growth seasons. The fertilizer treatments affected the growth parameters differently for the different species. For A. velotinum the greatest height growth of one and two- year old seedlings was achieved at treatment No. 14, which consisted of 90 kg/ha N, 120 Kg/h P, 90 Kg/ha K, 30 t/ha manure and 20 L/ha microelements. For F .rotundifolia, the greatest height and diameter growth rate was achieved at treatment No. 11, which consisted of 60 kg/ha N, 80 Kg/h P, 45 Kg/ha K, 30 t/ha manure and treatment No. 5, (60 kg/ha N, 80 Kg/h P, 45 Kg/ha K and microelements), whereas for A. cappadocium, The greatest growth rate was achieved at treatment No. 8 (only manure). So A. cappadocium needs only manure for higher growth and chemical fertilizer is not necessary in this nursery. Key words: nursery, fertilization, growth, seedling, Fraxinus rotundifolia, Acer velutinum , Acer cappadocicum.

کلیدواژه ها:

کود های شیمیایی ، نهالستان های جنگلی ، کاشت ، گیاهچه ها ، رشد