احداث کلکسیون پایه مادری صنوبرصفرابسته گیلان

Collection research design established with 64 clones of poplar at climatic condition of poplar research station in 1983. They are planted in distance 5 meter in row. This design find out after two nation design as collection of different poplar clones and selection nursery establishment. There are four genus of poplar in this research. They are contained poplus deltoids, p. euramericana, p.alba and p.nigra.Every year were studied factors of phenomena like open catkin, flowers, capsule of seeds and leaves falling. Results showed that Populus caspica and P. chopita were sooner than the other clones and P.d. 73/51 was late. Physiological activities start with appearance leaves that P.caspica was soon and P. Agresgrandis was late. Seeds adult and their distribution in P.e. GA/2 clone were sooner than others and deltiodes clones with some euramericana clones were latest. Amount of diameter growth in P.d. 73/51 clone with diameter average 25/24 cm and P.a.58/57 clone with diameter average 12/69 cm were most and least respectively. Height growth in P.d. 73/51 and P.a.58/57 with 21.54, 9.12 m were most and least respectively. Amount of volume growth was 0.798 m3 in P.d.73/51; wich was more than others and in P.a. 58/57 was least. At the end the clones of P. deltoides group has high vivacity and P.nigra group were dead generally. Keywords: poplar, clone, phenology, flowering, leaf growth, growth.