بررسی تاثیر مصرف نیتروژن و پتاسیم بر عملکرد کمی و کیفی گل داوودی

In order to investigation effect of nitrogen and potassium on quantitive and qualitative characteristics of chrysanthemum (Dendranthema morifolium), The experiment was carried out as factorial in randomized complete block design with four replication. Experimental treatments including: nitrogen with five levels 0, 100, 200, 300 and 400 kg/h as ammonium and potassium (K2O) with three levels 0, 150 and 300 kg/h as potassium sulphate. The results of experiment indicated that nitrogen had significant effects on flowering time, stem length, number and diameter of flower, stem diameter, bud length, peduncle diameter (P<0.01) compared to control(N0K0). The least flowering time, and the highest stem length, diameter and length bud got by N200 in contrast with control caused 7.5 percent decrease and 22, 11, 12 percent increase respectively. Flower diameter, wet and dry weight of cut flower in N300 wear 17, 67 and 50 percent respectively more than control. N400 increased 14, 13, 32 and 22 percent number of flower, peduncle and stem diameter and qualitative number respectively compared to control. Potassium had significant effect on earlier flowering (P<0.01) and qualitative number (P<0.05). K150 increased flower diameter 3 percent compared to control. K300 increased peduncle diameter and qualitative number 5 and 4.5 percent respectively. Interaction effect between nitrogen and potassium increased vase life of flower (P<0.05). The most vase life got by N100K150 that increased 9 percent compared to control. Key words : Chrysanthemum, Dendranthema morifolium, macroelement, nitrogen, nutrient, potassium.

Keywords:

کودهای شیمیایی نیتروژن دار , کریزانتموم , گل های داودی , ویژگی های زراعی