The aim of this research was to determined the role of humic acid (HA) and organic
fertilization (poultrey with cattle manure) on vegetative growth, flowering and cormels
production of Gladiolus (Gladiolus hybrida). Also investigating the ablity of
this organic
manure to provide nutrients for the plant in order to reduce the mineral fertilization.
Humax (50% humic acid) was used, and three applications of HA applied at 2 leaf, 2 and 4
leaf, and 2, 4 and 6 leaf stages of plant development.
The results showed that the use of humic acid had a positive impact on vegetative
growth (plant height and average number of leaves on the plant) it also showed a positive
effect on the formation of Spikes and flowering (early flowering, spike length, number of
flowers on spike).The positive effects were reflected on the proportion of dry matter in the
vegetative part.
The results indicated that plants sprayed with humic acid in presence of Chicken
manure produced higher cormels yield and economic profit than the control and those
fertilized with Cow manure. . Data also, Showed that T4 treatment (plants sprayed 3 times)
realized higher economic profit than authors treatment (112,66%).
