| Abstrakt: |
Under same conditions, initial density and age, an analysis was made of the status, growth and productivity of 25-year-old pure and mixed with silver linden forest plantations. The initial density was 2.0 x 0.5 m. The used tree species are as follows: common oak, cerris oak, hybrid elm, black walnut, silver birch, London plane tree, sycamore, field ash, black locust, Euro-American poplar -- clone Populus cv. I -214 and silver linden. Mixed plantations are with silver linden. The mixture is in lines, every other row, and in the row of the main species -- every other sapling, which means that the share of the main species is 25%. Under the specific conditions -- flat terrain, deep groundwater, carbonate chernozem and an altitude 15 m a.s.l., at the age of 25, from pure plantations silver linden shows highest degree of preservation, and the survival of other species is less. With the lowest share of preservation are cerris oak and black walnut. Black locust and poplar at this age also have a small degree of preservation. Growth, productivity and retention of silver linden in mixed plantations is not the same, both in pure and in mixed rows. With lowest indicators is the silver linden mixed with hybrid elm, and with highest ones -- mixed with poplar. In mixed plantations, the conservation rate of the main species is highest for the poplar, hybrid elm and London plane tree, which also have the best growth in thickness and height. Of the pure plantations, with highest productivity are the poplar, hybrid elm, London plane tree and silver linden. Of the mixed plantations with the highest productivity of the main species are the poplar, hybrid elm and London plane tree. [ABSTRACT FROM AUTHOR] |
