Besides the direct as well as indirect (basic rock powders) fertilizers, the different types of stimulative substances for production of high quality plantation stock as well as for support of young plantations in situ can be used. Aim of the presented study was the evaluation of the effects of different types of Bio-Algeen preparates on the growth and prosperity of planting stock, produced in the Forest Nursery Bukovina. Particular aims were defined: to stimulate the vitality and size of the root systems of planting stock produced, to improve the vitality of the planting stock, to accelerate the planting stock growth, to increase the resistance and vitality of out-planted material on the forest site. The obtained results showed very good production as well as economical effects of the Bio-Algeen preparates in the forest nursery. The biomass increased significantly and it can be assumed the better status and growth later after plantation on the forest lands.
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