The use of growth stimulators on spring durum wheat in the conditions of the Kursk region

The article presents the results of experiments on the use of growth stimulants for pre-sowing seed treatment in primary seed production of spring durum wheat of the Triada variety in 2022-2024. Two-component combinations of drugs were used as stimulants: Kornevin, Gumi-20, succinic acid, ethamone and chlorella suspension. Kornevin + succinic acid and Kornevin + ethamone increased germination energy by 2.5-3.0%, and laboratory germination by 4.0% and 3.0%, respectively. The yield of spring durum wheat in the succinic acid + chlorella suspension and Kornevin + Gumi-20 variants increased by 0.36 and 0.46 t/ha, including coarse fractions by 0.1 and 0.14 t/ha compared with the control. The yield in the Kornevin + Gumi-20 variant increased due to an 8.8% increase in the number of productive stems per 1 m2, a 6.6% increase in ear water content and a 6.3% increase in grain weight per ear, which resulted in a 15.1% increase in yield. The maximum value of the seed cenosis capacity of 7034 units/m2 and a reproduction coefficient of 1:39.1 was obtained using a root growth stimulator (1 g/l of water) + Gumi-20 (2 ml/l of water). A high content of protein and crude gluten at the class 2 level for durum wheat grain was established during pre-sowing treatment with root growth stimulators (1 g/l of water) + chlorella suspension (diluted with water 1:4) and succinic acid (1 g/l of water) + chlorella suspension (diluted with water 1:4). These growth stimulators are recommended for the pre-sowing treatment of spring durum wheat seeds of the Triada variety in primary seed nurseries.