Моделі конверсійних коефіцієнтів компонентів фітомаси деревостанів НПП «Голосіївський»

Анотація

The rapid growth of Kyiv population is accompanied by significant increase of different natural resources use and growth of recreational impact on forested areas, situated on its territory and surroundings. Natural parks and green belts around cities are of great ecological importance in human impact mitigating on the environment.

One of the largest forests territory in the capital of Ukraine is National natural park “Holosiivskyi”. By accumulating organic mas, the park’s forests carry out a number of ecological functions that ensure a normal functioning of the city. Oxygen production, stock of phytomass and deposited carbon in it are important indicators reflecting ecological functions of forests. The assessment of the carbon stock in the forest ecosystem at the regional level will enable us to characterize ecological functions of the NNP “Holosiivskyi” tree stands.

Determination of accumulated carbon stocks and their flows in the park forest stands requires the use of information obtained from temporary trial plots, laid directly in the studied region.  Adequate mathematical evaluation models of biomass components of NNP «Holosiivskyi» forest stands will be developed for informational support of modeling assessment and forecast of main components of biological dynamics productivity and assessment of carbon depositing function of forest stands on the base of laid temporary trial plots.

Scots pine (61.7% of the total area of wooded park forested areas), oak (14.5%), European hornbeam (6.9%) and common alder (6.8%) play the main role in the canopy cover formation.

For solving this goal materials of 10 temporary trial plots laid by the author in the studied region were used; 42 were taken from the bank of the scientific-research data of the departments of forest management, silviculture and forest engineering of National University of Life and Environmental Sciences of Ukraine. Distribution of TSPs according to tree species of National natural park «Holosiivskyi» is the following: pine – 25, oak – 9, hornbeam – 11 , alder – 7 temporary trial plots.

According to the results of field and laboratory researches that were processed on the computer using special application programs (MS Exel table processor, statistic program SPSS Statistic Base 21) the database of temporary trial plots was collected and analyzed. The database was further used for developing of multiple regression equations of conversion rates of the NNP “Holosiivskyi” tree stands.

Great number of conversion coefficients mathematical models phytomas’s components of wood, bark, branches and leaves were investigated. Regressive equations of phytomas’s components for pine, oak, hornbeam and alder were created. It was found out that main affect on conversion coefficients has age, stand density and site class. Adequacy of the obtained models by the source data was evaluated by statistics of their remnants as well as determination’s coefficients. The graphic analyzes was carried out. Reliable dependence for conversion coefficients of hornbeam’s bark and branches wasn’t received. Received models ancount regional peculiarities of tree stand as well as their taxation structure.  

Consequently, the developed regression equations of conversion coefficients take into account the peculiarities of the taxational structure of the investigated plantations and the regional peculiarities of forest ecosystems and can be used for calculating stock of phytomass of the NPP “Holosiivskyi” tree stands.