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                                      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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