Fertiliser efficiency in the formation of sunflower productivity

Plant nutrition throughout the vegetation period is one of main factors aimed at realising genetic potential sunflower hybrids when cultivated in all soil and climatic conditions. Currently, it important to study domestic under different growing conditions identify their competitiveness, thus improving crop quality yields. The use a wide range complex microfertilisers production along with fertiliser helps increase efficiency plant nutrient utilisation mineral fertilisers ways improve yields agricultural product quality. While considered be key oilseed crop, its cultivation technology not fully researched, previous studies often contain contradictory data. An part agrotechnical measures increasing productivity ensure optimal during period. purpose was determine influence select high-yielding (NK Diamantis, SI Kupava, NK Neoma) for specific through formation productivity. conducted 2018-2019 on typical low-humus chernozems. research program included three-factor field experiment which (factor A), options B), foliar feeding crops C) were studied phase 4 8 leaves Ecoline Boron, Nertus Bast Boron. Neoma. results revealed significant changes diameter inflorescence nutritional created by variants. hybrid features also determined this indicator. Plants Diamantis formed heads diameters ranging from 17.6 21.2 cm, Kupava - 18.8 22.1 Neoma – 17.2 21.6 cm. maximum index achieved variant introduction N36R56K108S28 + N23 Boron (phase leaves) plants amounted weight 1,000 achenes, genetically traits depending variant, varied 59.3 62.3 g, 69.8 74.0 68.8 72.6 g. result provided +N23 leaves). Studies have shown that most productive Si yield (in 1 l/ha) 3.46 t / ha