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                            Humic Substances Based Products
                            Humintech GmbH
                            Am P?senberg 9-13
                            D-41517 Grevenbroich

                            Telefon: +49 2181 70 676 - 0
                            Fax: +49 2181 70 676 - 22
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                            ORNAMENTAL & FLOWERS

                            Effect of Humic Acid on Yield and Quality of Marigold  (Calendula officinalis L.) - Abstract 

                            To study the effect of humic acid on yield and yield components of marigold, a complete randomized experiment with five levels of humic acid treatments (0, 500, 1000, 2000, 4000 mg/l) with three replications and 15 experimental plots was carried out. Analysis of variance showed that the effect of humic acid treatments on number of leaves and flowers, dry weight and plant height was significantly at the one percent probability level. Mean comparisons revealed that treatment with 2000 mg/l humic acid had the most dry weight, plant height, leaves and flowers number.

                            Humic acid effects on plant height were best for 2000 mg/l (yielding 27,45 cm, compared to the control with 18,55 cm). The humic acid effect on the dry weight (applying 2000 mg/l) yielded 215.7 gram, compared to the control with 141.26 gram. The positive effect of humic acid improving the ability to absorb nutrients may be due to its effect on the dry plant biomass, which was confirmed as well.

                            In conclusion, the effect of humic acid on yield and yield components of marigold was positive.

                            (Results of the Study by Ehsan Mohammadipour et al)

                            Table 1- Effecht of humic acid on the measured traits of marigold (Calendula officinalis L.)

                            Treatments Seedling height (cm) Leaves number Flowers number Dry Weight (g)

                            H1

                            18,55 c

                            30,67c

                            18,43 d

                            141,26 c

                            H2

                            22.61b

                            38.01b

                            23.59bc

                            175.66b

                            H3

                            24.37ab

                            40.09b

                            25.33ab

                            187.70b

                            H4

                            27,45a

                            46.00a

                            27.13a

                            215.07a

                            H5

                            22.05b

                            37.44b

                            20.70cd

                            171.36b

                            H1 control; H2: 500 mgl1 humic acid; H3: 1000 mgl1 humic acid; H4: 2000 mgl1 humic acid; H5: 4000 mgl1 humic acid  In each columm, means with a common letter are significant based on the LSD test.

                            table showing Effect of different humic acid levels on seedling height of Calendula officinalis L. Effect of different humic acid levels on seedling height of Calendula officinalis L.

                            Effect of different humic acid levels on seedling height of Calendula officinalis L.

                            Effect of different humic acid levels on dry weight of Calendula officinalis L. Effect of different humic acid levels on dry weight of Calendula officinalis L.

                            Effect of different humic acid levels on dry weight of Calendula officinalis L.

                            HUMINTECH GmbH

                            Humintech is a biotech company based in Grevenbroich, Germany. We are primarily focused on the research, development and industrial production of humic matter and humic acids for the agricultural sector.  Our products find further use in the feed, pharmaceutical and construction industry, in veterinary medicine and for ecological purposes such as water purification and soil decontamination.

                            Contact

                            Humintech GmbH

                            Am P?senberg 9-13
                            41517 Grevenbroich / Deutschland 

                            Phone: +49 2181 70 676 - 0
                            Fax: +49 2181 70 676 - 22
                            E-Mail 

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