كليدواژه :
فنولوژي , رشد ساليانه , درصد جوانه زني بذر , سوزني برگان , مراحل مختلف فنولوژي
چكيده لاتين :
From 1372 to 1381, in the second phase of research and study on phenology of some ornamental trees and shrubs at display section in National Botanical Garden of Iran, 1-5 trees of 7 species of conifers have been considered. This research includes the following items: Study on different phases of plant phenology (budding of winter shoot leaf, maturing time of all leaves, flowering time, the maximum time of flowering, end of flowering time, ripening term of seed, permanency time of seed on plant, quantity of seed production, germination percentage of seed, average of annually growth in length and diameter, pH measurement, humus quantity, percentage of organic and inorganic mineral materials (clay, silt, sand), soil tissue and aero- logical graphs.
The results showed that the cold air will delay the appearance and maturing time of leaves. So, the maturing time of Juniperʹs leaves are longer than deciduous plants and the ripening term of seeds will be long in cold air. Also rainfall influences on phenology changes as it will be sensible in conifers during summer and winter days.
The results showed that the flowering time in Thuja orientalis, ripening term of seed and leaving term in Pinus densiflora were longer than other species and ripening term of seed in Picea abies was shorter than other species of conifers.
