Influence of foliar feeding with organo-mineral fertilizers and bioorganic preparations of red clover seed grass stand on its structure indicators, biological productivity and seed quality

The article presents the results of studying the effect of foliar top dressing of meadow clover tetraploid variety Kudesnik with liquid organomineral fertilizer "Agromax Boron-Molybdenum 4%" produced by Kuban Agro-Resource LLC at a dose of 1 l/ha, bioorganic preparations Milefungtm "Boron" and "Boron + Molybdenum" produced by AgroBioTech in a dose of 100 ml/ha for structural parameters, biological yield and seed quality. The use of agricultural techniques in the interphase period of «stem extension stage – bud stage» led to a reliable decrease in plant height by 2.7–14.3 cm (LSD05 = 2.6 cm) or 2.8–14.6% below the control (97.8 cm), an increase in the proportion of generative stem stand by 22.6–76.0 pcs/m2 (LSD05 = 12,4 pcs/m2) or 13.9–46.7% above the control (162.7 pcs/m2), the total number of inflorescences in the herbage by 254.6–297.3 pcs/m2 (LSD05 = 133,0 pcs/m2) or 34.7–40.5% above the control (734.7 pcs/m2), the mass fraction of set seeds in the head structure by 1.76–8.38% above the control (12.63%), which in total increased the biological yield of seeds to 3.35–4.93 c/ha (by 1.6–2.64 c/ha or 46.3–115.3% compared to the control) (2.29 c/ha). A comparative assessment of the effectiveness of the tested preparations made it possible to single out the bioorganic preparation Milefungtm "Boron + Molybdenum", the use of which made it possible to most fully realize the seed productivity potential of the meadow clover variety Kudesnik.