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NITROGEN EFFECTS ON
GROWTH AND DEVELOPMENT OF SUNFLOWER HYBRIDS UNDER AGRO-CLIMATIC
CONDITIONS OF MULTAN
WAJID NASIM1, 2*,
ASHFAQ AHMAD1, AFTAB WAJID1, JAVAID AKHTAR3 AND DILBAUGH MUHAMMAD4
Abstract:
The effect of nitrogen
(N) on growth, development, yield and yield components of different
sunflower (Helianthus annuus L.) hybrids was evaluated under
agro-climatic conditions of Multan during spring 2008 and 2009. The
experiment was laid out in a randomized complete block design with split
plot arrangement having three replications, keeping cultivars in the
main plots and N levels in the subplots. The net plot size was 4.2 m x 5
m. The results showed that, with increasing N rates, there was increment
in the biomass, yield and yield components while the oil contents were
adversely affected. However, there was high seed yield in 2008 as
compared to 2009. Among sunflower hybrids, Hysun-38 gave more yield as
compared to other sunflower hybrids (Hysun-33, Pioneer 64A93), while in
case of N levels, 180 kg ha-1 provided higher yield than
other N rates (0, 60, 120, 240 kg ha-1) in both years of
study especially during 2008.
1Agro-Climatology Laboratory, Department of Agronomy, University of
Agriculture, Faisalabad-38040, Pakistan,
2Current Address: Department of Plant Sciences, Quaid-i-Azam University,
Islamabad-45320, Pakistan,
3Institute of Soil and Environmental Sciences-University of Agriculture,
Faisalabad-38040, Pakistan,
4Central
Cotton Research Institute, Multan-60000,
Pakistan.
*Corresponding author:
wajidnaseem2001@gmail.com
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