طرح ملی جنگل کاری پیشاهنگ کشور- مازندران

In order to find the most successful species in broad leaves and conifers in humid Mazandaran province in north of Iran and also better density for production much more cellulose matters, in a pilot plan, four species: Acer velutinum, Alnus subcordata, Juniperus virginianana and Fraxinus rotundifolia were chosen to study their performances. Seedling were planted in a split-split plot with three replication . The main plot was density with 3 levels(2*3, 3*3, 3*4 m) and sub plot was tree species. First time seedling prepared in nursery. After one year, broad leaves and two years conifer seedlings, replanted in site. Seedling were irrigated only by rain in site. In autumn, growth parameters, including: height, diameter at 1.30 meters height, crown coverage, stem heigh, vitality, Stem quality and terminal bud situation were assessed or measured. The quantitative and qualitative data analysis were using SPSS and software Kruskal-wallis test. The results showed that Alnus subcordata had the highest quantitative growth (height، stem diameter, crown coverage and stem height), and The lowest growth were observed in Fraxinus rotundifolia and Juniperus virginana. Qualitative Analysis Characteristics showed that J. virginiana had the best stem and vigority and located in first group thus F. rotundifolia and Acer velotinum located in others Groups. Four years studied in cleaning and weeding on reforestation have showed that increasing wood quality of Alnus and Acer dependes on weeding in first years. In Juniperus virginiana, weeding and cleaning has little affect because juniperus isn,t full heliophyte and be able to continue to growing under others plant which has light canopy. Treatment density has no significanty effect on quantities growth in first five period. Keywords: Pilot refoerstation, Conifer, Broad leaves, Chamestan, density