Effect of biological nitrogen on the harvest index of flower and essential oil of Calendula officinalis L. under End Season Water Deficit Condition
Journal Title: International Research Journal of Applied and Basic Sciences - Year 2012, Vol 3, Issue 2
Abstract
To evaluate effect of irrigation disruption on the harvest index of flower and essential oil of Calendula officinalis L., an experiment was conducted as split plot at the Research Farm of Faculty of Agriculture, Urmia University (latitude 37.53 °N, 45.08 °E, and 1320 m above sea level) in 2010. Treatments included end season water deficit (irrigation disruption at first, second, third harvest and without disruption as control) as main plot and amount of biological nitrogen (0, 3, 6, and 9 liter per hectare of biological nitrogen included Azotobacter and Azospirillum sp.) as sub plot were arranged in randomized complete block design with three replications. Data analysis of variance showed the significant interaction effect between irrigation disruption and biological nitrogen on essential oil and flower harvest index in first harvest, second harvest, third harvest, fourth harvest, fifth harvest and sum of total harvest. The highest harvest index of essential oil (0.38 %) in sum of total harvest belonged to irrigation disruption after first harvest and 9 liter per hectare of biological nitrogen. The maximum flower harvest index in in sum of total harvest (11.8 %) was obtained from control treatment of irrigation (without irrigation disruption) and 9 liter per hectare of biological nitrogen.
Authors and Affiliations
Fahime Shokrani| Urmia University, Department of Agronomy and Plant Breeding, Faculty of Agriculture, Urmia, Iran., Alireza Pirzad*| Urmia University, Department of Medicinal and Industrial Plants, Institute of Biotechnology, Urmia- Iran.alirezapirzad@yahoo.com, Tel: +98(441)2972399 mobile: 09141471338, Fax: +98(441)2779558, Mohammad Reza Zardoshti| Urmia University, Department of Agronomy and Plant Breeding, Faculty of Agriculture, Urmia-Iran., Reza Darvishzadeh| Urmia University, Department of Agronomy and Plant Breeding, Faculty of Agriculture, Urmia-Iran.
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