The effectiveness of nitrogen fertilizers and nutrition systems for the winter wheat cultivation using no-till technology in the Stavropol Territory arid zone

Abstract

The article presents materials on the effectiveness of nitrogen fertilizers in the nutrition system for the winter wheat cultivation using no-till technology in the Stavropol Territory arid zone for 2017-2019. As a result of the studies, it was found that all the studied doses of mineral fertilizers relative to the control option (without fertilizers) on average increased the content of nitrate (by 0.9-10.4 mg / kg) and ammonia nitrogen in the soil (by 0, 2-6.7 mg / kg) during the vegetation phases. The urea ammonium nitrate (UAN) application using Duport liquilazer contributed to an increase in the nitrate and ammonium nitrogen content in the soil layer of 0-20 cm in all phases of the winter wheat development in comparison with similar experimental options in which nitrogen fertilizers were applied using a sprayer. According to the two years research results, a steady advantage of the intra-soil application of UAN using Duport liquilazer was noticed and the difference in yield, depending on the variant, was 0.15-0.25 t / ha. However, the more effective option was the introduction of UAN N20 autumn + UAN N87 spring + water-soluble organic substance 20:20:20 (2kg / ha) + water-soluble organic substance 20:20:20 (2kg / ha) Duport liquilazer, which allowed to obtain a yield of 4.66 tons / ha.