Agrobiological assessment of binary cenoses in mixed crops of narrow-leaved lupine and spring barley in conditions of Polissia

Goal. Find ways of managing the productive potential new binary coenoses with narrow-leaved lupine and spring barley, optimizing sowing rates components in mixtures, fertilizer systems for growing green fodder. Methods. Field — short-term stationary experiment, laboratory determination quality indicators fodder according to generally accepted methods, processing experimental data using Microsoft Office Excel computer program. Results. During 2016–2020, an agrobiological assessment heterogeneous barley was carried out different ratios application. Binary a seeding rate were identified: 1.26 million germinated seeds (g.s.) (0.7N) + 1.5 g.s. (0.3N) 1.08 (0.6N) 2 (0.4H), where plants had highest relative productivity (RY) 0.88–1.54, sufficiently high competitiveness (0.19–1.47) valuable leguminous component, mixtures (RYM) 1.95–2.39 overall crop (RYT) at 2.43–2.63. The established ratio land equivalents (LER) 1.25–2.14 indicate that by 25–114% formed more yield per 1 ha than their monospecies crops. 18.5–28.3 t/ha or 4.8–7.4 dry weight (2.87–4.98 units, 0.56–0.93 digestible protein, provision f.u. protein 186–222 g), cost made 522–631 UAH/t. introduction complex mineral Ekoplant helped increase 23–32% compared control. application foliar treatment vegetative mass growth regulator Grainactive C contributed 4–16% corresponding options without treatment. Conclusions. A mixture is recommended Polissia conditions 0.7N 0.3N, on background fertilizing P55K41 Ecoplant C, which can ensure level 28.3 t/ha, 7.4 weight, 4.98 f.u., 0.93 186 g.