Ali Salehi Sardoei
The effects of vermicompost of an animal manure origin on the growth and flowering of Calendula officinalis grown under glasshouse conditions were determined. Marigold seeds were germinated, transplanted into media and grown-on for 150 days. The traditional base medium [control] was a mixture of 70% farm soil and 30% sand [v/v]. Treatments were either vermicompost incorporated at 10, 20, 30, 40, 50 and 60% into the base medium. Vermicompost had significant [P<0.05] positive effects on total parameter compared to both control amended media. The highest root volume, fresh weight of petal and shoot was achieved in 30% compost treatment. Plant performance was best in the 60% vermicompost medium.
