Application of Chemicals on Pea Crops in the Southern Forest-Steppe of the Omsk Oblast

The article presents data of field experiments conducted in 2021-2024 on meadow-chernozem medium-deep low-humus medium-loamy soil of the educational and experimental field of Omsk State Agrarian University, located in the southern forest-steppe zone of the Omsk oblast. The Santana pea variety was planted in the following crop rotation: clean fallow - wheat - peas - wheat. The experiments were conducted on two backgrounds: without fertilizers and with the addition of 1 centner of ammophos during sowing. The chemicals used were the herbicide Hermes (0.8 l/ha), the insecticide Zeppelin (0.1 l/ha), the fungicide Strike Forte (0.7 l/ha), and the growth regulator Albit (30 ml/ha). In the variant with complex chemicalization, Isagri Azot (3 l/ha) was added to the tank mixture and, during the budding phase, the crops were additionally sprayed with Isagri Phosphor (3 l/ha). Spraying of crops was carried out in the branching phase of peas during the formation of two to three pairs of true leaves with a working fluid consumption of 200 l/ha. The experiment was repeated four times, the plot area was 60 m2 (30x2). Determination of indicators of completeness of seedlings and survival of pea plants showed insignificant differences between experimental variants. The proportion of weeds in pea crops did not exceed 10%, which corresponds to a low degree of contamination. There is a tendency for a slight increase in the proportion of weeds against the background of the application of ammophos by 0.02-0.53%. The application of fertilizers also did not affect the indicator of productive moisture reserves in the soil. The lowest moisture consumption for crop formation was in the variant with complex chemicalization against the background of the use of ammophos. The minimum yield level was achieved in the variant without fertilizers with the treatment of pea crops only with herbicide - 2.95 t/ha, the maximum against the background of the introduction of ammophos with the use of complex chemicalization - 3.55 t/ha.