Effect of 2,4-Dichlorophenoxyacetic Acid and NPK fertilizer on the growth and bulb production two cultivars of freesia (Freesia hybrid L.) under-Kurdistan climate
DOI:
https://doi.org/10.48047/z9tcmw03Keywords:
Freesia plant, Cultivars, Bulbs, Bulbet, Vase life, NPK Fertilizers.Abstract
This study was conducted for the period from 1st February to 1st July 2024 in the Nursery of Dohuk
University to evaluate the best responding of two cultivars (Red, and Pink) to three concentration of 2,4-
D (0, 200, 400) mg L-1
of and NPK fertilizer (0, 150, 300) mg L
-1 Under the agro-climatic conditions of
Kurdistan. The best results include. The best response was for pink cultivar that significantly superior
than red cultivars in most of the studied parameters. Spray the plant with 400 mg L-1
2,4-D increased
superiorly the plant height (31.14) cm, growth index (923.8) cm3
, vase life (7.14) days, bulb number
/plant (6.33), bulbs weight /plant (11.76) gm, bulb size per plant (13.78), whereas spray the plant with
200 mg L-1
2,4-D increased the bulbet size/plant which reached to (7.22). Increased NPK fertilizer from
0 to 300 mg L-1
increased significantly the height of plant from 25.65 to 32.75 cm, growth index from
576.7 to 1057.2 cm3
, Vase life from 6.64 to 7.47 days, bulb number/plant from 5.28 to 6.22, bulbet
number/plant from 6.72 to 9.33, bulb weight/ plant 9.15 to 14.34 gm, bulbet weight/plant from 4.09 to
6.40 gm, bulb size/plant from 10.81 to 14.17, bulbet size/plant from 5.58 to 8.22. The treatment that
resulted in the highest significant values for most of the studied parameters was the combination of the
pink cultivar with 400 mg L-1
of 2,4-D and 300 mg L-1
of NPK.
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