|
|
|
OIL AND FATTY ACID ACCUMULATION IN SUNFLOWER AS INFLUENCED BY TEMPERATURE
VARIATION
GHULAM QADIR, SHAHBAZ AHMAD, FAYYAZ-UL-HASSAN AND *MUMTAZ AKHTAR CHEEMA
Abstract: Field experiments were conducted at the University of Arid Agriculture,
Rawalpinid during autumn, 2003 and spring, 2004 to document the oil
and fatty acid composition of sunflower hybrids in response to temperature
variations. Five sunflower hybrids (Super-25, Parsun-1, SMH-9706, Award
and Hysun-33) were sown on ten planting dates both in autumn and spring.
Experiment design was randomized complete block with split plot arrangements
replicated four times. Planting dates were kept in main plots and hybrids
in subplots. Sunflower hybrids exhibited significant differences for
oil and fatty acid composition. In autumn, amongst hybrids Hysun-33
performed better for oil and oleic acid while Award remained at the
top for palmatic and linoleic acid. However, in spring, Super-25 accumulated
the highest oil and linoleic acid while Hysun-33 was the best for stearic
and oleic acid. Planting dates also influenced oil and fatty acid composition
significantly. Overall, spring plantation accumulated higher oil and
oleic acid in comparison with autumn planting. However, autumn planting
accumulated less oil but higher linoleic acid which depicted an inverse
relationship of oleic and linoleic acid. In autumn, late August planting
accumulated the maximum linoleic and the minimum oleic acid. In spring,
late April planting exhibited the highest oleic and least linoleic acid.
Department of Agronomy, University of Arid Agriculture, Rawalpindi.
* Department of Agronomy, University of Agri. Faisalabad.
|
|
|