Meteorological conditions, mineral fertilizers and lime aftereffect influence on the barley grain yield and quality in the Irkutsk region

The results of studies of the meteorological conditions, mineral and calcareous fertilizers impact on the barley Biom yield and quality in the Irkutsk region in 2018-2019 in a crop rotation: corn, barley + clover, clover, wheat are presented. The experimental plot soil is grey forest loamy. Corn was the precursor; mineral fertilizers were applied at a dose of N30P30K30. In the growing periods of 2018 and 2019, which are characterized as dry, the barley yield was 1.53-2.01 t / ha and 1.86-2.42 t / ha, respectively depending on the type of experiment. In 2019, raise from mineral fertilizers application increased by 12-22%comparing without adding lime, with the lime aftereffect - by 8-19% and were the largest when applying complex fertilizer. The lime aftereffect of the 1st year did not affect the gain in yield. The yield value depended to a greater extent on the depth of precipitation both for the entire growing season and for the seedlings-tillering period; the average correlation dependence between these indicators was established over two years, the correlation coefficient was 0.69 and 0.62, respectively. Grain nature increased by 1-2% with the use of nitrogen-potassium fertilizers, and the weight of 1000 grains - by 4% in the variants with the introduction of nitrogen-phosphorus, nitrogen-potassium, and complex fertilizers for both backgrounds. The lime aftereffect increased the weight of 1000 grains by 2-5%. An increase in the amount of protein in grain by 6-8% was facilitated by nitrogen-phosphorus and complex fertilizers.