| УДК |
Аннотация: These preliminary observations demonstrate that the phytotron will make it possible to determine the various photo- and thermoperiodic systems controlling the growth of different provenances of European conifers. It is quite likely that optimal growth and bud breakage are determined by night temperature in one provenance, by day temperature in others, and by the difference between the day and night temperature in still others as demonstrated for different coniferous tree species of North America. Finally, there may be provenances in which thermoperiodic growth control is absent and only photoperiodism operates. A set of 30 climates differeing with regard to photoperiods and thermoperiods are being used simultaneously in the phytotron for this purpose
Экземпляры всего: 2
ИЛ-ИФ (2)
Свободны: ИЛ-ИФ (2)