Improvement Fresh Weight and Aerial Part Yield of Marigold (Calendula officinalis L.) by Humic Acid

Ehsan mohammadipour, Ahmad Gol

Abstract

To study the effect of humic acid on yield and yield components of marigold, a complete randomized experiment with 5 levels of humic acid treatment (0, 500, 1000, 2000, 4000 mgl-1) with 3 replications and 15 experimental plots was carried out. Analysis of variance showed that the effect of humic acid treatments on all measured traits was significantly at the 1% probability level. Mean comparisons revealed that treatment with 2000 mgl-1 humic acid, had the most flower number per plant, fresh weight and branches & nodes number.

Relevant Publications in Annals of Biological Research