Influence of chemical and organic fertilizer on growth, yield and essential oil of dragonhead (Dracocephalum moldavica L.) plant | Vpliv mineralnih in organskih gnojil na rast, pridelek in vsebnost eteričnih olj kačjeglavke (Dracocephalum moldavica L.)

English. Two field experiments were carried out to study the response of Dracocephalum moldavica L. to NPK fertilizer and different application techniques of MOG organic fertilizer in two regions of Iran (Piranshahr with cold Mediterranean climate and clay loam soil,  Maragheh with cool sub-humid temperate climate and sandy loam  soil). MOG is bio-organic fertilizer with plant origin and contains different natural enzymes and amino acids. In current study following treatments have been applied: NPK (a complete NPK 20-20-20, 90 kg fertilizer ha-1); MOG1 (soil application of MOG organic fertilizer at sowing stage); MOG2 (foliar application of MOG organic fertilizer at early stage of flowering); MOG3 (soil application of MOG organic fertilizer at sowing and at 5 to 6 leaf stage); MOG4 (soil application of MOG organic fertilizer at sowing and at 5 to 6 leaf stage with foliar application at early stage of flowering). Results indicated that all MOG treatments overcome the chemical fertilizers in both locations. However, plants grown in Piranshahr were more responsive to MOG fertilizer treatments than those grown in Mragheh. Overall, it could be concluded that utilization of MOG fertilizer as both soil and foliar application (MOG4) may increase content and yield of essential oil, which could be suggested as a suitable alternative for chemical fertilizers.

Slovenian. V dveh poljskih poskusih je bil preučevan odziv kačjeglavke (Dracocephalum moldavica L.) na gnojenje z NPK in različne tehnike uporabe MOG organskih gnojil na dveh območjih Irana (Piranshahr, s hladnim mediteranskim podnebjem in glineno-ilovnatimi tlemi, Maragheh s hladnim, semi humidnim zmernim podnebjem in peščeno-ilovnatimi tlemi). MOG je biološko gnojilo rastlinskega izvora, ki vsebuje številne naravne encime in amino kisline. V tej raziskavi so bili uporabljeni naslednji tretmani: NPK (NPK 20-20-20, 90 kg gnojila ha-1); MOG1 (talna aplikacija MOG organskega gnojila ob setvi); MOG2 (foliarna aplikacija MOG organskega gnojilav zgodnji fazi cvetenja); MOG3 (talna aplikacija MOG organskega gnojila ob setvi in v fazi 5 do 6 lista); MOG4 (talna aplikacija MOG organskega gnojila ob setvi in v fazi 5 do 6 lista s foliarno aplikacijo ob začetku cvetenja). Rezultati so pokazali,da so dala vsa obravnavanja z MOG boljše rezultate kot mineralna gnojila na obeh lokacijah. Rastline z območja Piranshahr so bile bolj odzivne na MOG gnojenje kot tiste z območja Maragheh. Zaključimo lahko, da uporaba MOG gnojil, tako talna kot foliarna lahko poveča vsebnost in pridelek eteričnih olj in bi se lahko priporočila kot primerna alternativa gnojenju z mineralnimi gnojili.