The effect of the method of plantation establishment on some morphological traits and yield of lovage roots (Levisticum officinale Koch.)
The field experiment was carried out in Zamość on the brown soil of loess origin in 2002-2005. There were four methods of plantation establishment compared: 1) direct sowing in the field; 2) direct sowing in the field with cover of polypropylene sheet; 3) by seedlings from plastic house; 4) by seedlings produced in multi-cell propagation trays. It was found that lovage cultivated from seedlings was characterized by higher root neck diameter as well as greater number of root branches. As a consequence, the obtained yield of air dry roots mass was higher than in cultivation from direct seeding, but the most successful method of lovage plantation establishment was by seedlings produced in multi-cell propagation trays. The use of polypropylene sheet caused a significant decrease of air dry roots yield in the first year of plant vegetation, but did not have any significant influence on the root yield in the second year. Chemical analyses showed small differences in the essential oil content in the roots. The greatest content of active substances was found in the one-year old roots of the control objects.