GERMINATION OF TANACETUM CINERARIIFOLIUM SEEDS ON DIFFERENT SOIL TYPES

Abstract

Tanacetum cinerariifolium (Trevir.) Sch. Bip. is a species of great economic importance because it contains Pyrethrins – natural insecticides with the potential to be the ideal means for pest control. Soil samples from different soil types (Skeletic Fluvisols, Rendzic Leptosol, Luvic Chernozem, Chromic Luvisols, Dystric-Eutric Cambisol, Pellic Vertisols) have been studied in order to determine the physicochemical soil indicators and the regressions between the soil characteristics and seed germination. Four hundred seeds (4х100) were planted in each soil type (in pots) under controlled conditions. Reliable statistically significant regressions, both negative (bulk density, sand fraction, available phosphorus) and positive (total porosity, silt and clay fractions, pH(H2O), CaCO3, Total Kjeldahl Nitrogen, Soil Organic Mater) with regard to seed germination have been established. The seeds planted in Rendzic Leptosol have shown the highest germination percentage, and the ones planted in Skeletic Fluvisols have shown the lowest germination percentage. Key words: Pyrethrum cinerariifolium Trev., Chrysanthemum cinerariifolium Bocc, seed germination, soil.