The aim of the research is to decrease ecological loadings on irrigated agrolandscapes using electro-chemically activated water (ECAW). The research was conducted in 2010-2012 in Volgograd region at the light-chestnut loam soils using tomato cultivar Monty F1. The studying factors were (A) the level of applying chemicals for plant protection provided intensive and reduced level, (B) regime of ECAW applying during vegetation period of tomatoes including the variants without ECAW and applying each fifth, forth, and third irrigation, (C) discharge regime of ECAW within a single watering according to four variants: 1 – discharge of anolyte (AN) (redox potential from + 570 to + 600 ìV and ðÍ 5.1-5.3) by the volume of 50 % of the whole irrigation rate (IR) followed by 50 % of non-activated irrigation water (IW), 2 – discharge of AN (25 % of IR) followed by IW (50 % of IR) and then catholyte (CAT) (redox potential from – 220 to – 250 ìV and ðÍ 7,8-7,9) (25 % of IR), 3 – discharge of AN (10 % of IR) followed by IW (50 % of IR) and then CAT (40 % of IR), 4 – discharge of IW (50 % of IR) followed by CAT (50 % of IR). The study developed a statistical model of regression class which allows explore the patterns of yield change for tomatoes at different combination of technological elements of applying ECAW under drip irrigation. The conducted study justifies that the use of ECAW enables to keep tomato yields at the level of 90 t/ha even using reduced regime of applying chemicals for plant protection. The most efficient regime of ECAW applying was at using ECAW every forth irrigation when discharging AN (10 % of IR) followed by IW (50 % of IR) and then CAT (40 % of IR). The tomato yield was 95.5-100.1 t/ha.
Key words: drip irrigation, electro-chemical activation, catholyte, anolyte, irrigation technology, tomato, productivity.
