Abstract
Of the field crops cultivated in Mordovia, the leading position belongs to barley, which is used for food, feed and brewing purposes. The latter option of its use is economically feasible and many varieties are used for these purposes. Knowledge of the influence of individual technology elements (mineral fertilizes and nutritional area) on productivity, economic and energy parametres and grain quality of new intensive type varieties in specific soil and climatic conditions is very important. The experiment was carried out to establish the possible parameters of productivity of malting barley of Grace variety in case of different types of mineral nutrition and plant density, with the task to identify the impact of the studied factors on grain yield and economically and energy efficient variants. Experimental work was carried out on the educational and experimental farm at Ogarev National Research University named after N. P. Ogarev in 2012, 2014 and 2015. The article shows the features of grain yield formation, economic and energy parametres, depending on technology elements. The suitable doses of fertilizers and seeding amount of malting barley cultivation were identified. The results of impact studies of fertilizers and plant density on grain yield and cost; net and energy income, profitability, bioenergy efficiency of Grace malting barley when cultivated on leached black soils of Mordovia are presented. It was found that the highest grain yield (3.84 t / ha), conditional net income (26277 rubles / ha) and energy balance (49.3 GJ / ha) are observed when fertilizing with N60P60K60 and sowing 5.5 million seeds per hectare; with the same planting density, but without fertilizer application - profitability (374 %). The maximum bioenergy efficiency coefficient (4.6) and the minimum grain cost (2214 rubles / ha) were noted with a seeding amount of 5.5 million / ha, but the predominant energy efficiency coefficient (3.0) and the lowest grain energy intensity was 94. 8 GJ / t) - with a seeding amount of 4.0 million / ha
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