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THE RESEARCH IN WHAT CONCERN THE BEHAVIOUR OF SOME SUNFLOWER HYBRIDS CULTIVATED IN IRRIGATION CONDITIONS IN DOBROGEA

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Author(s): Gabriela-Mariana STOICA | Ionel JINGA | Viorel DINCA | Alexandru CHIPER

Journal: Scientific Papers Series : Management, Economic Engineering in Agriculture and Rural Development
ISSN 2284-7995

Volume: 12;
Issue: 2;
Start page: 171;
Date: 2012;
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Keywords: tolerance | geomorphological unit | pedological rate | yield

ABSTRACT
The research of some sunflower hybrids cultivated in Dobrogea in drought-conditions. The research took place in the period 2009 -2011at S.C.D.A,Valu lui Traian,ConstanĊ£a County,an area which is representative for its climatic conditions, the geomorphological unit and soil type are specific to the region in which the trial results will be implemented.There were followed up 6 hybrids (Favorit,Singi,Delfi,PR64A89,Tekny and Kondi) and three levels of water supplies: unirrigated,irrigated with pedological irrigation rate of 700m3/ha and irrigation with pedological irrigation rate of 350 m3/ha(50%from pedological rate) . The accomplished research showed the fact that the years 2009 and 2010 were not fovourable to sunflower crop but 2011 was a very advantageous one.The yield average during the three years(2009-2011) showed that in unirrigated conditions,the yield of the 6 hybrids was between 29,3q/ha and 35,0q/ha.Through the application of the irrigation rate of 700m3/ha,the yield average during the three years of trials has increased, its value being between 34,3q/ha(FAVORIT) and 45,0q/ha(KONDI).The reduction of the irrigation rate with 50% caused a decreasing yield for the whole sunflower hybrids. The yield varied from 30,5q/ha (FAVORIT)and 41,5q/ha(KONDI). In unirrigated conditions, the yield had the lowest level and it depend on the climatic condition of the crop year. KONDI hybrid showed a stable yield in unirrigated conditions and different climatic conditions between 2009-2011. FAVORIT hybrid yield was very much affected by the weather conditions of the crop years.
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