Optimization of coriander nutrition on leached chernozem of Central Caucasus

Abstract

The article reflects the results of studies on the responsiveness of coriander “Amber” variety to a combination of doses and types of mineral fertilizers. As a result of the conducted researches for 2016–2018, it was established that the maximum crop yield was obtained on options N60P60-1.60 t/ha and N60P60K60-1.53 t/ha. It should be noted that for the Stavropol territory there are no scientifically sound recommendations for the practical application of mineral fertilizer systems, introduced under the culture of coriander. During the three-year field experiments, the influence of types and combinations of doses of mineral fertilizers was studied and the seed productivity of coriander when growing on leached chernozem of the Central Caucasus was established. The method of introduction of mineral fertilizers according to the Georges-Ville scheme (control, N60, P60, K60, N60P60, N60K60, P60K60, N60P60K60) used during the field experiment allowed us to obtain information about the effectiveness of types and combinations of mineral fertilizers. It was noted that the application of nitrogen fertilizers increased the NO3 content: when applying N60 – 11.6 mg/kg; N60P60 – 7.3 mg/kg; N60K60 – 3.6 mg/kg; N60P60K60 – 6.1 mg/kg. The result of the field experiment showed that the content of the mobile forms of phosphorus in the soil increased significantly to the control, and the difference was 3.4–5.6 mg/kg of soil. The effectiveness of potassium in many cases is moderate. The maximum value of exchangeable potassium was observed on the option with the use of K60-260 mg/kg of soil, and the minimum concentration of exchangeable potassium when applying N60P60-232 mg/kg of soil.