إنبات بذور اللوز الشرقي Amygdalus orientalis و نمو شتلاته

الملخص EN

This research was conducted at Agriculture Faculty, Damascus University during the period 2012-2013 to investigate the effect of some treatments on seeds germination and seedlings growth of Amygdalus Orientalis.

Seeds were soaked in gibberillic acid (0, 250, 500ppm) for 24 h.

and cold stratified at 4ºcْfor 20, 40 and 60 days.

The effect of GA3 application, cold stratification and the interaction between GA3 and cold stratification treatment was studied.

Seedling growth, the effect of Ammonium Sulfate (0, 25g/l), foliar application of GA3 (0, 25, 50ppm) and the interaction between N fertilizer and GA3 application were also studied .The effect was evaluated for seedling at three months of age.

The best germination rate (81.36%) was observed when seeds were soaked in GA3 at 500 ppm and stratified for 40 days.

The interaction effect between GA3 treatment at 500ppm and cold stratification for 60 days resulted in highest germination rate (17.63 day/seed).

Concerning seedlings growth stage, data show that the interaction treatment (25g/l Ammonium Sulfate + 25 PPM Ga3) and this resulted in the highest stem length (56.67 cm), leaves number (85 leave/plant), fresh weight (18.13 gm) and dry weight (8.16gm) for shoots, Meanwhile, the highest stem diameter (4.5 mm) was observed when Ammonium Sulfate was applied at 25g/l and GA3 was sprayed at 50 ppm comparing with the studied treatments, and with control (46.92 cm, 3.52 mm, 70.38 leave/plant, 15.01 gm, 6.76 gm for stem length, stem diameter, leaves number, fresh weight and dry weight).

Concerning the leaf content of N.P.K, the highest N concentration (4.23%) was found when Ammonium Sulfate was added at 25%.

Moreover, the control-un-treated plants resulted in the highest P concentration (0.233%) while the highest K concentration (3.2%) was observed when GA3 Was added at 50 ppm.