Influence of cobalt nutrition on coriander (Cariandrum sativum L.) Herbs yield quantityand quality

摘要

Two field experiments were conducted to evaluate the effect of cobalt on coriander herb yield quantity and quality. Coriander seeds were sown in Research and Production, National Research Centre, Nubaria cite, Beheara Governorate, Delta Egypt. Cobalt was irrigated in the form of cobalt sulphate in five concentrations (0.0, 7.5, 10.0, 12.5 and 15.0 ppm cobalt) once. Coriander herb was first harvested after 2 months from sowing and reharvested again 2 additional harvests at monthly intervals. All the plants received natural agricultural practices during the two growth seasons 2010 2011. Cobalt treatments significantly increased coriander herb yield, minerals composition (except Fe), chemical constituents as well as essential oils components compared with control plants. Cobalt at 12.5 ppm resulted the maximum figures in each three harvests during two studied seasons.