The variability of sunflower (Helianthus annuus L.) yield and quality influenced by wheater conditions

CERNÝ IVAN, VEVERKOVA ALEXANDRA, KOVAR MAREK, MATYAS MARTIN: The variability of sunfl ower (Helianthus annuus L.) yield and quality infl uenced by wheater conditions. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2013, LXI, No. 3, pp. 595–600 The fi eld polyfactorial trials were carried out on experimental fi elds in Nitra – Dolna Malanta in two experimental years 2010 and 2011. Experimental locality is situated in the maize production area (climatic region: warm; climatic sub-region dry; climatic zone: warm, dry with mild winter and long sunshine), in altitude 250 m above sea level, with brown soil. In the trials was observed the infl uence of both temperature and moisture conditions of experimental area on sunfl ower yield of achenes and fat content (conventional hybrids NK Kondi and NK Tristan). Technological system of sunfl ower cultivation was realized in accordance with conventional technology of cultivation. The basic fertilization was made by balance method on the base of soil agrochemical analysis for expected yield 3 t ha −1 . The results show, in the range of achieved both achenes yield and fat content, that the year 2011 was statistically high signifi cantly more favorable for yield formation than 2010. The variability of hybrids was statistically high signifi cant, where the most productive was hybrid NK Kondi in comparison with NK Tristan in yield and quality the point of view. In the 2010 was found small negative correlation between yield of achenes and fat content. The correlation was slightly positive in the 2011, when the lower amount of precipitation and higher temperature infl uenced positively the yield formation and achene quality. sunfl ower, yield, achene, fat content, correlation analysis