PJB-2013-290
EFFECTS OF IRRIGATION REGIME ON GROWTH AND SEED YIELD OF SUNFLOWER (HELIANTHUS ANNUUS L.)
MOHAMMAD SHAFI1*, JEHAN BAKHT2, MOHAMMAD YOUSAF3 AND MOHAMMAD AMAN KHAN4
DOI:
Abstract
Field experiments were conducted at National Agricultural Research Center Islamabad Pakistan to study the response of sunflower hybrids to irrigation levels. Four irrigation levels (control, heading stage, heading + flowering stages, and heading + flowering + grain filling stages) were applied to two sunflower hybrids (Parsun-1 and SF-187). Randomized complete block design in split plot arrangement having 5 replications were used. Irrigation levels were kept in the main plots while hybrid in the sub plots. Plant height, number of leaves plant-1 and head diameter was significantly (p≤ 0.05) affected by irrigation, hybrids and year. The effect of irrigation was non significant on 100 seed weight, seed yield ha-1 and oil content (%) due to rainfall at the experimental site during both growing seasons. The effect of the year was significant on 100 seed weight, seed yield (kg ha-1), and oil content. Taller plants, bigger heads, maximum 100 seed weight and high seed yield was produced during 2002 when sunflower crop received three irrigations at heading stage, heading + flowering stages, and heading + flowering + grain filling stages compared with other treatments.
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