EFFECT OF ORANG PEEL (CITRUS SINENSIS) L. POWDER ON GERMINATION AND GROWTH OF SOME ORNAMENTAL PLANT

The research was conducted to study the effect of orange peel powder Citrus Sinensis L.in seed germination and growth of three types of ornamental plants white flower of thinking. Viola tricolor maxima, Petunia Petonia hibrida, The balsam Impatiens holstii ,The results showed that adding orange peel powder at a ratio of 10 and 20 gm/kg soil caused a significant increase in seed germination and seedling growth for the three types of ornamental plants compared to the control plants (without addition), and the highest percentage of increase in seedling germination was recorded when adding 20 gm/kg soil in the three species of ornamental plants, the highest increase in root and vegetative length was recorded at the same addition, while the results showed a difference in the response of the three types, where balsam and petunia showed distinction over the third type, which is the white flower of thinking.The research also included preliminary qualitative disclosures about some active compounds in orange peels, which are flavonoids, glycosides, tannins, which are secondary metabolites that are chemical compounds with antagonistic activity. The results showed the presence of these compounds in orange peel powder.