تعيين مناسب ترين مدت سرمادهي و عمق كاشت بذر وشا

Determination of the Best Prechilling Treatment Period and Sowing Depth for Seeds of Dorema Ammoniacum in Natural Condition.

After collecthing the Dorema ammoniacum seeds, they need to pass a period in coldness, untill they grow up. So the periods of 0, 20, 25, 30 and 35 days were selected to determine the best coldness periods. Also some seeds were selected as control treatmeat with out passing this period. Temperatures for experimental treatments was 3-4cand control treatment was put in room temperature of (13- 16 c). Experimental treatment seeds were planted in vase and after two months , vegetaing buds were counted. By analysing the results , the best coldness period was determineed as 30 days. Dorema ammoniacum seeds were collected from their naturel inhabitat to determine the best sowing depth. Three treatmeats were considered to be cultivated in the depth of 0.5 -1 and 1.5 centimeters. Seeds were planted in 30 plastic vases. Buds were counted after growing up and the results were analysed. The result shows that there is no significant difference between these three treatments of depth and those three cultivation depths are suitable for seed germination (vegetation).