LONG-TERM DYNAMICS OF MIRE PRODUCTIVITY CRANBERRY BERRIES (OXYCOCCUS PALUSTRIS, ERICACEAE) IN SOUTH KARELIA
V.K. Antipin, P.N. Tokarev
Institute of Biology, Karelian Research Centre, RAS, 185610, Petrozavodsk, Pushkinskaya str., 11
antipin@krc.karelia.ru
Keywords: клюква, мониторинг, урожайность ягод, болотный участок, пробная площадь, вегета ционный период, температура воздуха, осадки, Южная Карелия, cranberry, monitoring, fruit-bearing capacity of berries, mire site, sampling site, vegetative season, air temperature, precipitation, South Karelia
Abstract
The long-term (1986-2015) yielding capacity dynamics of mire cranberry in three mire areas with permanent sampling sites: oligotrophic cotton grass-Sphagnum (No. I), mesotrophic swarf shrub-grass-Sphagnum (No. II) and mesotrophic pine-dwarf shrub-sedge-Sphagnum (No. III) was studied. The amount of berries was calculated at estimation sites, 1 m2 in area, in the large-scale fruit maturation period (17.09-19.09) and berry mass was estimated. A diagram for the fruit-bearing capacity of cranberry at each sampling site, depending on the phytocenotic conditions of its habitat and weather in the vegetative season, was constructed. Th e recurrence probability of abundant or good yield was found to be 6-7 % at site I, 60-63 % at site II and 35-37 % at site III. Cranberry fruit productivity tends to decline, which is due to extremely unstable weather conditions not only in the vegetative season but also all year round.
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