TITLE:
Nitrogen Management of Diverse Sunflower (Helianthus annus L.) Hybrids Production under Agro-Climatic Conditions of Sargodha, Pakistan
AUTHORS:
Muhammad Irfan Ahmad, Amjed Ali, Aaqil Khan, Alam Sher, Arif Rashid, Sikandar Ali Jamro, Shafeeq ur-Rahman, Saboor Ahmad
KEYWORDS:
Sunflower, Nitrogen, Growth and Yield
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.8 No.6,
May
26,
2017
ABSTRACT: A field study was carried out with the objective to
determine the effect of various levels of nitrogen on growth, development,
yield and yield components of different sunflower (Helianthus annuus L.) hybrids i.e. Hysun-33 and S-78 were evaluated under
agro-climatic conditions of Sargodha, Pakistan during spring 2013. 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 × 6 m. The growth parameters
such are leaf area, leaf area duration and yield parameters were observed are
Days to a thesis, Days to maturity, head diameter (cm), No. of achene’s per
head, Achene yield (kg·ha-1) and total dry matter (kg). The results showed that increasing the
nitrogen rate also increased the No. of achene’s per head, Achene yield (kg·ha-1) and total dry matter (kg) in S-78 hybrid where the nitrogen application
rate was 180 kg·ha-1 as compared to Hysun-33 cultivar.