Effect of Training Method and Spraying Gibberellic and Salicylic Acide on Some Vegetative Growth Characters of Snapdragon Plants Antirrhinum majus L.

Abstract

The experiment was conducted at research station of the Horticulture and landscape department/ Agriculture college/ Diyala university during 2017 - 2018 seasons (8/10/2017 - 4/5/2018). The objectives of the experiment were to investigate the effect of training method , training method included four types (single stem, double stems , three stems and four stems). Gibberellic acid sprayed with two concentration (100 , 200 mg.L^-1) also salicylic acid sprayed with two concentration (50, 100 mg.L^-1) and control treatment sprayed two times with distilled water in 15/1/2018 and 15/2/2018.

Training methods had significant effects on shoots growth characteristics, Single-stem training method had the best regarding plant height132.36cm, leaves chlorophyll content28.29%, total carbohydrate content58.78Spad unit. Four-stem training method had best results regarding leaves number269.72 leaf/plant, leaf area3235.98cm²/plant, fresh weigh of shoots72.77gm/plant, dry weigh of shoots19.18gm/plant. give spraying 100 mg/l of gibberellic acid had best results regarding plant height124.80cm, leaves number172.91leaf/plant, leaves area2872.81cm²/plant, fresh weight of shoots73.99gm/plant, dry weight of shoots19.48gm/plant, leaves chlorophyll content55.07spad unit, total carbohydrate content28.29%. Interactions between the studied factors had significant effect in all studied characteristics.