To study the effect of plant density and different nutritional systems
(chemical, biological, and integrated) on the quantitative and qualitative
performance of Thymus daenensis L. in Mahidasht Agricultural Training
Center, Kermanshah/Iran, in 2017, an experiment was conducted in a
split-plot design based on a randomized complete block with four
replications. The first variable involved two planting distances in the row
of 15 and 30 cm (the main factor), and the subsidiary factor comprised four
different nutritional systems including control (no-fertilizer), chemical
(100 kg superphosphate, 100 kg potassium sulfate, 150 kg urea per ha),
biological (8 tons of cattle manure/ha), and integrated (50% cattle manure +
50% chemical) fertilizers. The results showed that the integrated fertilizer
treatment produced the highest shoot dry weight (789.1 kg/ha), essential oil
content (3.35%) and root length (15.97 cm). The integrated fertilizer
treatment along with the 30-cm planting density resulted in the highest
essential oil content of 3.35%. The results of this project have suggested
that the integrated fertilizer and the 30-cm planting interval is the
optimal treatment in thymus production due to the higher chemical fertilizer
efficiency and better crop quality.