PERFORMANCE OF HYBRID AND SYNTHETIC VARIETIES OF SUNFLOWER GROWN UNDER DIFFERENT LEVELS OF INPUT
Keywords:
Sunflower, hybrid variety, synthetic variety, input levelAbstract
Sunflower (Helianthus annuus L.) is an important oil crop grown in the central part of Thailand for oil and its field can be a tourist attraction. This experiment was aimed to evaluate the potential of hybrid and synthetic varieties of sunflower under different levels of input. Two hybrid varieties(Pac22 and Pac77) and four synthetic varieties (CM1, S471, S473 and LOC) were evaluated under four levels of input (Control, Low, Medium and High) by using a strip-plot design at Suranaree University of Technology Experimental Farm during August, 2009 and August, 2010. The results, averaged over all input levels, showed that hybrid varieties outyielded synthetic varieties by 6.62%.Pac77 yielded the highest at 2,000 kg ha-1. Among synthetic varieties, LOC gave the highest yield at1,894 kg ha-1. The highest oil content was obtained from hybrid variety Pac77 (39.60%), while S471gave the highest oil content for synthetic variety (35.47%). All characters of the sunflower were found to respond to increased levels of input. The yield and yield supporting characters including seed size, head size and shelling percentage responded in a quadratic manner.
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