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Field assessment was carried out in the oilseeds field experimental portion, Sindh Agriculture Research Institute, Tandojam, Pakistan, throughout the year 2017-18. To assess the impact of conjunctive nitrogen use and foliar zinc on sunflower growth and yield in a Randomized complete block design contains 3 replications and with the size of plot 5m × 3m (15 m2). Seeds of “Hysun-33” sunflower variety were taken in this experiment. The details of treatments are i.e. height of plant (cm), girth of stem (cm), diameter of head (cm), index of seed (1000-grain weight per g), seeds head-1, seeds head-1 weight(gram), biological yield (kg per ha) and yield of seeds (kg per ha). The present study exposed that the treatment T2 = N @ 100 kg ha-1 + Foliar Zn (3.0% conc.), produced topmost plant height (110.0 cm), girth of stem (7.2 cm), diameter of head (23.2 cm), seeds head-1 (1829.7), weight of seeds head-1 (69.5 g), index of seed (60.3 g), biological yield (8413.6 kg per ha) and yield of seeds (2549.5 kg per ha). Whereas, the least plant height (62.3 cm), seeds head-1 (975.1), seeds head-1 weight (39.4 g), index of seed (34.5 g), biological yield (2863.2 kg per ha) and seeds yield (907.3 kg per ha) was observed under treatment T6 = N at the amount of 150 kilogram ha-1 + Foliar Zn (3.0% conc.). However the least girth of stem (3.5 cm) and diameter of head (13.7 cm) was recorded under treatment T1 = N at the amount of 100 kg per ha. It is accomplished from the outcome that all the treatments conjunctive use of nitrogen and foliar zinc resulted in positively significant influence on the growth of sunflower and on yield. N at the amount of 100 kilogram ha-1 + Foliar Zn (3.0% conc.) for achieving maximum yield of seed (2549.5 kilogram ha-1) of sunflower variety ”Hysun-33” proved most appropriate treatment. Key words: Nitrogen, Foliar Zinc, Growth, Yield, Seed, Sunflower (Helianthus annus l.)
ZAHOOR AHMED PALIJO, GHULAM MUSTAFA LAGHARI, SHAHNAWAZ PALIJO, ALI RAZA, AMJAD ALI MEMON. (2020) EFFECT OF CONJUNCTIVE USE OF NITROGEN AND FOLIAR ZINC ON GROWTH AND YIELD OF SUNFLOWER (HELIANTHUS ANNUS L.), fuuast Journal of Biology, Voleum 10, Issue 1.
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