shahla shafiee adib; Majid Amini Dehaghi; Fatemeh Shahbazi
Abstract
In order to study of the effects of vermicompost and chemical phosphorous fertilizers on the quantity and quality of John’s wort, an experiment was conducted as factorial experiment based on randomized complete blocks design with three replications in Shahed University, Tehran during two years ...
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In order to study of the effects of vermicompost and chemical phosphorous fertilizers on the quantity and quality of John’s wort, an experiment was conducted as factorial experiment based on randomized complete blocks design with three replications in Shahed University, Tehran during two years of 2011-2012. Treatments were phosphorous fertilizer (0, 100 and 200 kg.h-1) and vermicompost (0, 5 and 10 t.h-1). Agronomic characteristics were including plant height, flowering shoot yield, biological yield, hypericin yield and harvest index.There were significant differences in vermicompost and phosphorous fertilizer treatments and interaction between them Pr < 0.01.The maximum hypericin yield and flowering shoot yield was obtained by applying 200 kg.ha-1 phosphorous fertilizer plus 5 ton.h-1 vermicompost and 200 kg.ha-1 phosphorous fertilizer plus 10 ton.h-1 vermicompost, respectively. It seems that chemical phosphorous fertilizer and vermicompost can increase quantity and quality yield in John’s wort medicinal plant.