Response of sunflower ( Helianthus annuus L . ) to organic manure and biofertilizer under different levels of mycorrhiza and sulphur in comparison with inorganic fertilizer

Research experiment was conducted in a typical sandy loam soil during rabi seasons of 2013-14 and 2014-15. The experiment was laid out in Randomized Block Design (RBD) with five types of biofertilizers, viz. Phosphate Solubilizing Bacteria (PSB), Azotobacter sp., Trichoderma viride, Pseudomonas fluorescens and Azospirilum lamos with three label of VAM (VAM0 kg ha-1, VAM5 kg ha-1and VAM12 kg ha-1) and four levels of sulphur (S0 kg ha-1, S12 kg ha-1, S25 kg ha-1and S37 kg ha-1. The results showed that, combination of VAM12 kg ha-1 with sulphur12 kg ha-1 significantly (P > 0.01) increased seed yield, and seed oil content. The highest seed yield of 3354.15 kg ha1(2013-14),3666.84 kg ha-1(2014-15) and oil content 981.09 kg ha-1(2013-14), 1072.54 kg ha-1 (2014-15) was obtained for the treatment T1 (Organic manure with biofertilizers 247 kg ha-1 + VAM 12 kg ha-1+ Sulphur 12 kg ha-1). The results also indicated that, treatment T3 (FYM 19753 kg ha-1+ organic manure with biofertilizers 247 kg ha-1+ sulphur 37 kg ha-1) gave approximate nearest result as T1{seed yield of 3204.86 kg ha-1(2013-14), 3490.91 kg ha-1(2014-15) and oil content 925.565 kg ha-1 (2013-14),1008 kg ha-1 (2014-15)}.

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