EFFECTS OF PRE-CHILLING AND STRATIFICATION PERIODS ON SEED GERMINATION AND SEEDLING GROWTH OF PISTACIA KHINJOK STOKS

This study was conducted in the forestry department nursery of Mosul University; to investigate the effects of stratification degrees & chilling on seed germination and seedlings growth of Pistacia khinjuk stock. The results revealed the superiority of seed stratification in 12c stratification in comparison with 4c stratification. the 12c gave the higher averages of germination energy (%) , germination percentage (%) , Survival percentage (%) , Seedling length (cm.) & seedling diameter (mm), the averages were 26.96%, 36.39 % , 34.74% , 54.54 cm, 5.90mm respectively , Also the stratificated seeds for 20 days were superior in all characters and gave the highest average in germination energy 34.42% , germination percentage 49.80% survival percentage 46.36%, seedling length 55.41 cm., and seedling diameter 6.1 mm. The chilling period 48 hour was superior in characters of germination energy (29.95%) , germination percentage (40.33%) , Survival percentage (38.16%) , Seedling length (64.09)cm. and seedling diameter (6.37)mm.