The purpose of research is to study the effect of water volume supplied to the sown Bulgarian pepper seeds on the density and timing of sprouts, growth and development of plants. For jet irrigation simulation a single-row hand-operated seeder with a water-spraying system of jet irrigation was used. The device made it possible to set different depth of sowing by changing the penetration depth of share into soil from 1–2 cm to 8–10 cm. The water volume supplied to the seeds was regulated by seeder speed and the flow of water supplied to the pipeline. The dimensions of soil moistening (wetting) loop were adjusted depending on crop need in moisture, duration of seed germination, soil moisture content and forecast of weather conditions for the period of sprouts. Subsurface jet irrigation was done in such a way that water did not moisten the uppermost soil layer and soil crust wasn’t formed on the surface, therefore the irrigation norm and the concentration of nutrients were calculated in each specific case. Seeds of the zoned variety of Bulgarian pepper Moldova were sown. In accordance with the scheme of experiment, different amount of water was supplied to the Bulgarian pepper seeds. With the use of jet subsurface irrigation, sprouts became available 5–11 days earlier than without irrigation, maturation and harvesting terms came 3–11 days earlier, period of yield increased by 2–5 days, which also provided a higher productivity. The highest yield of an average 4.32 kg per square meter was observed on the variants with a radius of humidification contour 3 cm and depth of sowing 2–3 cm and 4–5 cm. The first frosts (minus 4 degrees Celsius) on 10.07.2015 and 15.10.2016 stopped the growing season of pepper and reaping.
Key words: subsurface irrigation, irrigation regime, yield, soil, nutrient, seeds, seed bed, device.
