DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 7-8/1986 str. 99 <-- 99 --> PDF |
Prof. Dr. Branimir Prpić Ecology of the Forest The ecology of the forest is a specialist and scientific field which has to be considered during the initial development of forestry practice and science. Very important developments have been made in this field during the last 50 years, both here in Yugoslavia, and all over the world. The problem of the selection of tree species, stability of forest eco-systems, importance of general functions of the forest, and, at the same time, a need for incressing production of wood for technological and energy uses, requires more and more intensive research into the ecology of the forest — especially the relationship between the population and the forest community. As forests become every day a condition of qualitative human life, the ecology of the forest relates more closely to human ecology. The phenomenon of forests dying due to industrial and air pollution makes the ecology of the forest the focal point of social interest. Many kinds of trees are in danger, as well as whole forestry regions. Another problem occurs when rivers are diverted in order to build hydra-electric power plants, and as a result the water flow in those areas is altered. These changes have seriously endangered forests an the valleys of the Sava and Drava rivers in the Socialist Republic of Croatia. Because of the aforementioned situations which disturb the forest´s eco- systems, research of the forest´s ecology is obliged to find solutions which will guarantee the survival of the folrest, and maintain its various functions. Besides dealing with depleting forests in normal conditions, the ecology of the forest has to cope with changes in the »chemical climate« and water flows which cause the death of some trees, groups of trees, and even whole communities of cultivated trees: common oak (Quercus pedunculata Ehrh.), sessile- flowered oak (Qu. sessiliflora Salisb.), common elm (Ulmus minor Mill.), narrow- leaved ash), (Fraxinus angustifolia ssp. pannonica Fuk -Soo et Simon), beech (Fagus sylvatica L.), silver basswood (Tilia tomentosa Moench.), silver fir (Abies alba Mill.), and common spruce (Picea abies Karsten). The ecology of the forest uses natural forest (virgin forest) as the model to attain stability of forest componets in multi-purpoSe forests. Dr. Nikola Komlenović Physiology and Nutrition of Forest Trees and Ecophysiology At the end of the last century, in the Šumarski list, one could read of the importance of leaf litter for chemical and physical properties and forest tree nutrition, and the potential damage inflicted on fotrests by the continued gathering of litter. The authors base their discourses on the results of investigations carried out in other countries. In the period between the two world wars, the studies of mineral nutrition of forest trees were included in the scope of pedological investigations. During the pdlst-war period, a fair amount of attention was |