Abstract

Raghu MS*, Manjunatha Chari K, Tuppad GB and Upperi SN

A field experiment was carried out to study the effect of secondary and micronutrients on growth, yield parameters and nutrient uptake of sunflower (Helianthus annuus L.). The results revealed that the highest seed yield was recorded in the treatment with application of T8 (RDF + secondary nutrients + micronutrients + cow urine spray at 30 and 50 DAS) (1391.73 kg ha-1 ) and it was significantly superior over T1 (1166.66 kg ha-1 ) and T4 (1263.21 kg ha-1 ) but on par with the rest of treatments. The Highest total dry matter accumulation was observed in treatment T8(RDF + secondary nutrients + micronutrients and cow urine spray at 30 and 50 DAS) (4117.67 kg ha-1 ) and significantly superior over T1 (3444 kg ha-1 ), T3(3462 kg ha-1 ), T4 (3490 kg ha-1 )and T7(3541 kg ha-1 ) but it was on par with other treatment. Significantly highest growth parameters noticed in T8 than others treatments. The application with T8: RDF + secondary nutrients + micronutrients and cow urine spray at 30 and 50 DAS, recorded, higher uptake of Nitrogen (76.92 kg ha-1 ), Phosphorous (13.87 kg ha-1 ) andPotassium (72.48 kg ha-1 ). Significantly higher seed oil content (38.44 per cent) and oil yield (535 kg ha-1 ) in application of secondary and micronutrients along with RDF (T8) compared to control (35.34 percent and 413 kg ha-1 respectively).