Growth and yield of sunflower (Helianthus annus L.) as influenced by nitrogen, sulphur and farmyard manure under temperate conditions

Abstract

A field experiment was conducted at the Research farm, Division of Agronomy, Sher-e-Kashmir University of Agricultural Sciences and Technology, India for two consecutive rainy (kharif) seasons of 2009 and 2010 to find out the impact of nitrogen, sulphur and farmyard manure (FYM) on growth and yield of sunflower (Helianthus annuus L.). Application of 120 kg N ha -1 significantly increased all the yield components viz., plant height, leaf area index, dry matter production, capitulum diameter, achenes capitulum -1 and 1000-seed weight. Pooled yield increased by 26% with 120 kg N but it was statistically at par with 80 kg N ha -1. With increased N dose, the oil content consistently decreased but the oil yield improved during both years. Sulphur application at the rate of 60 kg ha -1 significantly increased plant height, leaf area index and dry matter production after 25 days of sowing (DAS).All yield contributing characters viz., filled achenes capitulum . Application of FYM at the rate of 10 and 20 t ha -1 was at par with each other but recorded significant improvement in the plant height, leaf area index and dry matter production of sunflower after 25 days of sowing over no FYM. FYM @10 and 20 t ha -1 increased the oil yield by 11 and 5.4 %, respectively over no application.

<b>Different nitrogen and boron levels influence the grain production and oil content of a sunflower cultivar

“…Rasool, Hassan, and Jahangir (2013) observed that as N doses increased, grains production and oil yield also increased; additionally, grains oil content decreased when high N doses were applied.…”

“…The search for genotypes that efficiently use N by optimizing N fertilization has been the subject of several studies on important agronomical crops (Avice & Etienne, 2014). N is essential for sunflower grain production and oil extraction (Rasool, Hassan, & Jahangir, 2013). Abdel-Motagally and Osman (2010) observed how increased soil N through fertilization influenced several growth parameters (plant height, stem diameter, head diameter, 100-seed weight, seed yield plant ), causing production increases.…”

Effects of poultry litter compost and chemical fertilizers on growth and yield of field grown sunflower (Helianthus annus L.)

“…High percentage poly-unsaturated fatty acids in sunflower oil such as linoleic acid in classical sunflower, which can reach up to 90% of the total unsaturated fatty acids, makes it high-quality edible oil commercially (1) . Its seed has a good percentage of crude fibre (16-27), ash (2)(3), soluble sugar (7)(8)(9) and hull (21-27) (3) .…”

Synergetic effect of combination of Gracilaria dendroides extract and Azospirillum lipoferaum on growth and yield of sunflower (Helianthus annuus L.)

“…Its rank as a source of edible oil in the world is the fourth next to soybean, palm oil and canola (Osman and Awed, 2010). It contains a good percentage (48-53) of oil (Rasool et al, 2013). It has a great potential in bridging the gap between demand and supply of edible oil to a significant extent in the years to come (Abd El-Mohsen, 2012).…”

“…Integrated use of biofertilizer sourc es of nutrients is very important for higher productivity and sustainability (Rasool et al, 2013). Keeping these aspects in view, the present investigation aimed to assess the impact of applying different concentrations of seaweed liquid extract (SWLE) by soaking seeds and / or coating it with A. lipoferaum suspension on growth and productivity of sunflower (Helianthus annuus L.) in newly reclaimed soils.…”