The effect of foliar fertilizers ApaSil and Apaliqua LCF on the yield of tomato (Solanum lycopersicum L.) when grown on drip irrigation in open ground conditions of the Central district of the Non-Chernozem zone

Relevance. The growing demand for food in the context of shrinking water resources necessitates the introduction of resource-saving technologies in agriculture. In the Central district of the Non-Chernozem zone of Russia under open ground conditions, where an increase in air temperature is accompanied by a decrease in precipitation during the tomato vegetation period, the use of drip irrigation and fertilizers becomes a critically important element of the cultivation technology. Drip irrigation is a promising technology that allows significant water savings (30-70 %) and increases yield (20-90 %). Tomato is one of the most important vegetable crops of global significance, demanding in terms of water and nutrient regimes. However, the potential of combining drip irrigation with the application of ApaSil (registration number – 445-10-3473-1) and Apaliqua LCF (registration number – 312-10-1656-1) preparations to increase tomato productivity in the open ground of the Central district of the Non-Chernozem zone of Moscow Region has not been studied. Materials and Methods. The research was conducted in 2020-2023 in open ground at the experimental plot of FSBSI FSVC. The objects of the study were cultivars of cultivated tomato Solanum lycopersicum L. from the collection of the laboratory of breeding and seed production of solanaceous crops of FSBSI FSVC: Magnat, Blagodatny, Gnom. Results . The highest fruit weight for the cultivars: Magnat 195.4 g (+10 % to control), Blagodatny – 116.4g (+19.3 %), Gnom - 59.3g (+10.3 %), was obtained with the combined application of ApaSil (400 g/ha) and Apaliqua LCF (40 l/ha) preparations. The yield with the same treatment increased to 74.3 t/ha (Magnat, +26.8 %), 88.1 t/ha (Blagodatny, +27.4 %) and 67.1 t/ha (Gnom, +18.2 %). The combined use of the preparations was more effective than their separate application. Conclusion. Analysis of the data showed that foliar fertilizing with ApaSil (400 g/ha) and Apaliqua LCF (40 l/ha) under drip irrigation effectively increases tomato productivity in the open ground of the Central district of the Non-Chernozem zone.