ASSESSMENT OF NATURAL SALT WITH HERBICIDAL ACTIVITY EFFECTON THE FERTILITY PARAMETERS OF THE KRASNOYARSK FOREST-STEPPE AGRO-CHERNOZEM

The objective of the study is to evaluate natural salt with herbicidal activity based on the fertility parameters of the agrochernozem of the Krasnoyarsk forest-steppe. In order to study the effect of natural salt on reliable and effective soil fertility, unique yield, and productivity of spring soft wheat (Triticum aestivum L.) varieties, a field experiment was conducted at the Borsky Scientific and Production Complex on 31 Novosibirsk using the following scheme: 1 – control (no treatment); 2 – natural salt, 30 % solution; 3 – 30 % solution of natural salt plus adhesive (satellite, one liter of liquid). The experiment was repeated four times. Natural brines from the Troitskoye deposit, located in the Krasnoyarsk Region, were used as a herbicide in the experiment. Explored reserves of the halite mineral in these deposits amount to approximately 1 billion tons. Satellite, which is an isodecyl alcohol oxylate, was used as an adhesive. A single spraying of spring wheat crops with a 30% natural salt solution containing adhesive at the onset of tillering increased the availability of mobile phosphorus and exchangeable potassium in agrochernozem soils, as well as an increase in the amount of mobile humic substances by 12–15 %, without any deterioration in soil condition (e.g., soil salinization). Under the influence of a 30% natural salt solution, the overall density increased by 11 %. The addition of adhesive to a 30 % natural salt solution contributed to an increase in overall and productive tillering by 13–6 %, an increase in plant length by 9 cm, spike length by 2 cm, and an increase in the number of spikelets per spike by 25 % compared to the control, with minor deviations in the indicator. Modifying the agrochemical properties of agrochernozem and optimizing the crop structure elements under the influence of natural brine combined with an adhesive promoted maximum spring wheat yield of 35 centners per hectare. The increase in wheat grain yield compared to the benchmark was 32 %.