Effect Of Humic Acid Treatment, Acid Addition Periods, And Irrigation Intervales On Growth Characteristics And Mineral Content Of Clandulla Officinalis L

Abstract

This study was conducted in one of the nurseries in Al-Dour district - Salah Al-Din Governorate for the agricultural season 2024-2025 to study the effect of concentrations of humic acid, periods of its addition and different irrigation intervales on the growth characteristics and mineral content of the chrysanthemum plant Clandulla officinalis L. using plastic pots. The first factor was the addition of humic acid to the anvils at concentrations of 1, 2 and 3 ml, and the second factor was the periods of adding the acid after 20, 40 and 60 days of planting The third factor is irrigation every two, three, and four weeks. Statistical analysis was conducted at a level of (P≤0.05), and the results showed the following:

The triple interaction(adding 3 ml of Humic acid, adding it after 40 days, and irrigating every two weeks)superior  with the highest values ​​for characteristics  plant hight, number of branches, , number of leaves per plant,leaf relative water content % and chlorophyll content with ratio reached 15.50 cm,8.90 branch,84.40 leaf, 119.00% and 18.20 mg gm^-1.The same interaction superior in the mineral nutrteion concentration Nitrogegen,Phosphor and Potassium.