Health condition of pine plantations in the western part of Low Dnieper sands
Journal Title: Лісівництво і агролісомеліорація - Year 2016, Vol 129, Issue
Abstract
Condition of pine stands in Ivanovo and Kinburn sand arenas has been researched. It was shown that the most of pine stands of older age groups are characterized by severely weakened health condition. Dynamics of health condition index of pine plantations was simulated. It was described by a power function with the highest rate of approximation (0,519–0,983). The indices of health condition for pine plantations calculated by the models show that depending on species composition, health condition index of Crimean pine in the age range 5–60 years increases from 1 to 2.8, and health condition index of Scotch pine – from 1.1 to 3.5, respectively, on the Kinburn sand arena. These results show significantly better health condition of Crimean pine plantations. A similar trend of health condition index is indicated in Ivanovo sand arena. However, the Crimean pine plantations up to the IV age class are resistant against pests and diseases in comparison with Crimean pine plantations of Kinburn sand arena. The difference of health condition index was ranged from 0.1 to 0.3. The possible reason for better condition of Crimean pine in Ivanovo sand arena is the lack of Rhizina undulata Fr., which is very common in Kinburn forests. The analysis of the health status of plantations by types of forest site conditions show the tendency of health condition deterioration as forest site becomes poorer. To improve the health status and to increase biological stability of pine stands it’s necessary to provide timely thinning and sanitary cuttings for forest stand forming and improvement, as well as to eliminate the residues from logging in accordance with the Rules of fire safety in the forests of Ukraine.
Authors and Affiliations
P. Pyrohova
Keywords
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