The resistance to different quality salting of cereal sorghum variety Ros grown against the background of mineral fertilizer

The results of the influence of various quality salinization on the germination of seeds of grain sorghum of Ros variety grown on the fields of the Region Research and Development Institute of Selection and Seed Farming - branch of SamRC RAS, using mineral fertilizer nitroammofosk in different doses in 2019 were presented. Sorghum, despite relative lack of demand for soil fertility, was responsive to the introduction of organic and mineral fertilizers. Agrochemical field experiment made it possible to find out positive effect of fertilizer on the yield and quality of cultivated crop of grain sorghum of the Ros variety. The degree of the resistance of the variety to sulphate, chloride and mixed types of salinization was established. The effect of different-quality salinization on the lengthof the roots was revealed. The results were ranked by the resistance groups to different types of salinization. The studies were carried out in the Laboratory for the Selection of Seed Production of Cereals and Sorghum Crops in 2020 in laboratory and field conditions. The object of the study was the variety of cereal sorghum Ros, grown in the Volga Region Research and Development Institute of Selection and Seed Farming - SamRC RAS Branch. It was proved that the germination of seeds of grain sorghum Ros in the conditions of different-quality salinization had not reached and had not exceeded the level of control and amounted to 36.9-85.6 % of control values. The length of the roots of the sorghum variety Ros was from 0.1 to 6.0 cm and did not exceed the control values for all the variants. It was revealed that all the investigated test variants with using mineral fertilizer were highly resistant under the conditions of sulphate, chloride and mixed salinization in equal amounts and belonged to the fourth and fifth class of soil salinization.