The effectiveness of using a plant growth stimulator based on Ambrosia artemisiifolia when growing corn in the Kabardino-Balkarian Republic

The article presents the results of studies on the use of a biological product based on ragweed, due to its chemical composition, on corn crops. Double treatment of corn crops with a plant growth stimulator based on ragweed (Ambrosia artemisiifolia L.) was carried out at growth phases of 3–5 and 6–7 leaves in calculated doses with a working solution consumption of 300 l/ha. The repetition in the experiments is 4-fold, the placement of the variants of the experiment is randomized. Plot area – 50 sq.m. The use of a plant growth stimulator based on ragweed as a pre-sowing treatment of seeds and foliar dressings can increase the yield of corn grain by 14–40%, depending on the corn hybrids studied in the experiment. On the variants of the experiment, where the combined use of organic fertilizer Biohumus and plant growth stimulator based on ragweed (solution 3) was studied, the above quality indicators were higher than the values of the control variant by 1.6; 6.0 and 1.5% – in the hybrid Ladoga 191 MV; at 3.2; 3.0 and 3.8% – Krasnodar 196 MV; by 2.9; 5.9 and 2.2% – Darina MV; at 3.3; 6.2 and 3.7% – Kuban. In the variant of the experiment with the joint use of organic fertilizer Biohumus and plant growth stimulator based on ragweed (solution 3), the value of the conditional income indicator decreased by 5400 rubles, according to the variant of the experiment with the joint use of organic fertilizer Biohumus and stimulant growth of plants based on ragweed (solution 4), the value of this indicator decreased by 7200 rubles, relative to the variant of the experiment with the combined use of organic fertilizer Biohumus and plant growth stimulator based on ragweed (solution 1) .