Acta Univ. Agric. Silvic. Mendelianae Brun. 2013, 61, 595-600
Published online 2013-05-23

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

Ivan Černý1, Alexandra Veverková1, Marek Kovár2, Martin Mátyás1

1Department of Crop Production, Slovak University of Agriculture, Tr. A. Hlinku 2, 942 76 Nitra, Slovakia
2Department of Plant Physiology, Slovak University of Agriculture, Tr. A. Hlinku 2, 942 76 Nitra, Slovakia

The field polyfactorial trials were carried out on experimental fields in Nitra - Dolná 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 influence of both temperature and moisture conditions of experimental area on sunflower yield of achenes and fat content (conventional hybrids NK Kondi and NK Tristan). Technological system of sunflower 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 ha1. The results show, in the range of achieved both achenes yield and fat content, that the year 2011 was statistically high significantly more favorable for yield formation than 2010. The variability of hybrids was statistically high significant, 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 influenced positively the yield formation and achene quality.


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