ABSTRACT
Nutrition is an important factor in plant growth and phytochemical compound. Application of natural fertilizers in medicinal plants production can improve their yield and medicinal indices. This study investigated the possibility of substituting chemical fertalizers by biofertilizer [Nitroxin, biophosphorus and biosulfur] in purple coneflower production. We compared vegetative yield and total phenolic compounds of purple coneflower in response to biofertalizers and chemical nitrogen. Experiment was conducted at field of Tarbiat Modares University on 2009-2010 growing seasons using a RCBD with three replications. Twelve experimental treatments included: chemical nitrogen as urea [C], biosulfur [S], biophosphorus [P] nitroxin[N], urea+biosulfur[CS], urea+biophosphorus[CP], urea+nitroxin[CN], biophosphorus+biosulfur[PS], Nitroxin+biosulfur[NS], nitroxin + biophosphorus[NP], integration of three biofertilizers [NPS] and the control [without fertilizers]. Treatments had significant effect [p