Responsiveness of a new variety of spring barley Notable to the seeding rate in the Ryazan region

 Relevance. At present, with the change in economic conditions and the possibilities of agricultural production, it is necessary to clarify in some cases and revise complex agro-technological methods for growing barley that meet the requirements of intensive technology. An increase in grain production is impossible without the development of modern, costly technologies for growing grain crops.

Methods. In the conditions of the Institute of seed production and agricultural technologies – a branch of the Federal state budgetary scientific institution "Federal scientific Agroengineering center VIM" (Ryazan region) in 2018-2020, field studies were conducted to establish the optimal seeding rate for a new variety of spring barley Notable, which provides the highest and stable grain yield over the years. We studied seeding rates with an interval of 0,5 million germinating grains per hectare (3,0; 3,5; 4,0; 4,5; 5,0 and 5,5 million).

Results. It was found that the seeding rates have a significant impact on the size and quality of the barley grain yield. It was found that a decrease in the rate of seeding of seeds of the Noble variety leads to an increase in the percentage of germination and preservation of plants before harvesting. Thus, the correlation analysis revealed a close relationship between the yield and the preservation of plants for harvesting (r=+0,86). Based on the observation of the phenological phases of this crop, it was found that the date of their occurrence and the duration of interphase periods did not depend on the seeding rates, but had a close relationship with weather conditions (r= + 0,71). Option with a seeding rate of 3,0 million crops. grains/ha formed the maximum tillering coefficient, had the highest productivity of one plant and the number of grains per ear compared to other variants of the experiment – 3,2; 3,6 and 25,3, respectively. In connection with the thickened sowing on the variant of 5,5 million vsh. grain / ha, there was an increase in the development of most leaf diseases by 1,0-1,5 points compared to the variant of 3,0 million vsx. grains/ha and by 0,5-1,0 points compared to the other variants of the experiment. The highest yield over the years of research was achieved with a seeding rate of 3,0 to 4,5 million crops. grain/ha – 6,4-6,5 t/ha.

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