INFLUENCE OF DIVERSE ORGANIC SOURCES ON GROWTH AND YIELD OF SUNFLOWER (Helianthus annuus L.)
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Date
2019-08-16
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UNIVERSITY OF AGRICULTURAL SCIENCES, GKVK, BENGALURU
Abstract
A field experiment was conducted at Zonal Agricultural Research Station, UAS, GKVK, Bengaluru, during kharif 2018 to study the influence of diverse organic sources on growth and yield of sunflower. The experiment was laid out in a RCBD design with eight treatments replicated thrice. Application of Farm Yard Manure (FYM) on N eq. ha-1 + Bio Digester Liquid Manure (BDLM) on N eq. ha-1 + jeevamrutha at 1500 l ha-1 + panchagavya spray (7.5 %) recorded significantly higher seed yield (2195 kg ha-1) and oil yield (872 kg ha-1) and it was on par with application of FYM on N eq. ha-1 + jeevamrutha at 1500 l ha-1 + panchagavya spray (7.5 %) (1996 kg ha-1). The same treatments showed similar trend with respect to growth and yield parameters and also nutrient uptake by the crop (nitrogen, phosphorus, potassium). Soil fertility status improved with higher available nitrogen, phosphorus and potassium (389, 43.32 and 273 kg ha-1, respectively). Significantly higher bacteria, fungi, actinomycetes, N-fixers, P-solubilizers population and dehydrogenase activity were recorded in soil with application of FYM on N eq. ha-1 + BDLM on N eq. ha1 + jeevamrutha at 1500 l ha-1 + panchagavya spray (7.5 %). Higher net returns ( 43,468 ha-1) and B:C (2.08) ratio were recorded with application of FYM on N eq. ha-1 + BDLM on N eq. ha-1 + jeevamrutha at 1500 l ha-1 + panchagavya spray (7.5 %).