تأثير فوسفات البوتاسيوم و البرولين في النمو الخضري و الزهري لصنفين من أبصال النرجس (Narcissus daffodil L.)‎

الملخص EN

A study was conducted during 2013 – 2014 season at lath house of agriculture , University of Basra to study the effect of potassium phosphate and proline on two cultivars of Narcissus daffodil.

Nine treatments came from two concentration of of potassium phosphate ( 100 and 200 mg/L ) and two proline concentration ( 25 and 50 mg/L ) besides the control treatment for two cultivars (magnet and Sempre Avanti ) .

Randomized complete block design were used in three replications for each treatment in factorial experiment .

means were compared by LSD at 5% probability .

Results showed magnet cultivar was superior in vegetative growth criteria compared to Sempre Avanti.Potassium phosphate at 200 mg/ L gave the best vegetative growth characteristics compared to control treatment.

Magnet cultivar treated by proline at 50 mg per liter significantly increased plant height to 44.1cm , whereas , number of leaves was higher under the treatment of proline ( 25 mg/L) for CV.

Sempre Avanti which was 9.33.Treatment of cv.

Sempre Avanti by potassium phosphate ( 100 mg/L) produced significant increase in fresh weight which was 27.50 gm.

Magnet cv.

had the best flowering characteristics such as ; decrease the period to reach flowering , length and diameter of petiole .

flower diameter of Sempre cv was higher than that of Magnet cv .

Proline at 25mg/L reduced period to reach flowering ( 80.33 days ) and flower diameter ( 78.5 mm ), the best lengh and diameter of petiole came from the treatment by proline at 50 mg/L .The interaction between Magnet cv and potassium phosphate ( 100 mg/L ) was significantin in flowering time and diameter of petiole ( 70.67 days , 8.39 mm ) rspectiveley .

petiole length was higher under the interaction of proline ( 50 mg/L ) and Magnet cv, wheras , flower diameter was higher under the interaction between proline ( 50 mg/L ) and Magnet cv, wheras ,flower diameter was higher under the interaction between proline ( 50 mg/L ) for Sempre Avanti cv which was 75.14 mm .

Sempre Avanti cv had the highest bulb number and bulb weight.

The best characteristics of bulb came from the treatment by potassium phosphate at 200 mg/L.

Proline at 50 mg/L caused the highest bulb weight ( 67.33 gm ) for Sempre Avanti cv, wheras ,potassium phosphate ( 100 mg per liter ) gave highest number of bulbs ( 5.00 )for Sempre Avanti cv.

No significant differences were noticed between the two cultivars in chemical characteristics.

Proline (50 mg/L ) gave the highest carbohydrate content of leaves .

The interaction between proline (50 mg/L) and Sempre Avanti was signticant in carbohydrate and proline content which was 15.

29 mg/100 gm and 1.82 mg /100 gm , respectively.