Научный журнал

The alluvial meadow medium-subject soil of the Non-Black Sea zone yields a new hybrid of cabbage white-spotted Continent F1 to 80.5 t/ha with an increase in control from 7 to 52% and agronomic efficiency of 19 to 62 kg of products per 1 kg of fertilizer. The natural fertility of the soil (control) provided 53 tons/ha of cabbage. The main introduction of N180P100K270 yielded a yield increase of 28%; half dose is ineffective (7%); the use of N75K62 fertilization in the sheet socket phase (I decade of July) against the background of N90P50K135 increased yield by 10-12%; The maximum return on fertilizers by additional yield (62 kg/kg d.v.) is obtained with the main introduction of N218K132 (41% to control). The main N90 introduction did not provide the necessary nutrition of the nitrates of cabbage plants, and the use of N294 created an elevated nitrate background in the soil into the growth phase of the head. The main introduction of N90 did not provide the necessary nutrition of nitrates of cabbage plants, and the use of N294 created an increased nitrate background in the soil in the growth phase of the head (late August - early September), which negatively affected the quality of cabbage (excess nitrates). The content of mobile phosphorus in the soil was at a high level - more than 20 mg/100 g at all observations, including variants with no phosphorous fertilizers. By the end of the growing season (01-03 October) only on variants N294P44K247, N180P100K270, N90P50K135 and N75K62, the movable potassium content remained elevated (8-12 mg/100 g). The closely correlated relationship between the yield of Continent F1 cabbage with the average nitrate content in the soil (r-0.92), movable phosphorus (r-0.87) and potassium (r-0.80) has been determined. The closest connection with nitrates and mobile phosphorus is obtained in the analysis of soil samples taken in the leaf socket phase (June 20-25), and with movable potassium - in the formation phase of the head (July 29-30).