PRODUCTION PARAMETERS OF SUNFLOWER (HELIANTHUS ANNUUS. L.) INFLUENCED BY WEATHER CONDITIONS AND FOLIAR APPLICATION OF PENTAKEEP - V AND ATONIK

Abstract

In field trials with sunflower was monitored the influence of yearly weather conditions and foliar applications of both Atonik and Pentakeep V on a yield and fat content in sunflower achenes (hybrids Alexandra PR, NK Alego and NK Brio) in years 2009 – 2010. Experimental task was realized by field polyfactorial experiments established in warm corn production area (climatic region: warm; climatic subregion: dry; climatic zone: warm, dry with mild winter and longtime sunshine, brown soil) in Center of Plant Biology and Ecology of FAFR SUA in Dolná Malanta. The trials were established by split plot design with randomized complete blocks base design. From two-year small plot trials was found statistically non-significant impact of weather conditions of year, hybrids and application of Atonik and Pentakeep – V on achene yield of sunflower. The impact of monitored factors on fat content was statistically high significant. In variable yearly weather conditions higher average yield and achene fat content was achieved in year 2010. The most adaptable for production on concrete agroecological conditions were hybrids NK Brio and Alexandra PR (3.03 t ha-1), for fat content NK Brio (44.25 %). Foliar application of Pentakeep V in dose 0.1 l ha-1, 0.5 l ha-1 respectively most significant influenced the yield of achenes (3.43 t ha-1), fat content (44.71 %) respectively.