Air temperature influence on seasonal development of common maple seedlings

Abstract

The article presents the results of the 3 years of phenological development observations of maple sprouts, depending on the date of seeds sowing. Experimental autumn and spring sowings of maple seeds in the nursery sowing department are selectedas objects. Seedlings, grown with the autumn sowing of winged seeds are 7–10 days ahead in the development of the spring sowing seedlings. It is also found out that the seasonal development is closely associated with the effective daily average air temperatures indices (?+5°C).