Abstract
Field experiment was conducted during kharif season of 2017 and 2018 at Instructional Farm under Bidhan Chandra Krishi Viswavidyalaya, West Bengal in sandy loam soil to study the growth and yield of transplanted kharif rice variety Satabdi (cv. IET 4786) as influenced by biological products. The experiment was laid down in randomized complete block design (RCBD) with seven treatment combinations replicated thrice. Results revealed that RDF + soil applied Bolt GR @ 10 kg/ha produced higher growth attributes and yield of tested rice cultivar. The same treatment registered significantly higher total N and K uptake in tested cultivar; while the highest P uptake was recorded with RDF + Seed treatment with JumpStart2.0 @ 0.83 ml/kg seed. The treatment RDF + soil applied Azospirillum @ 2 kg/ha brought about significant positive changes of available N content in post-harvest soil over control situation (only RDF). However, significantly higher available P content was estimated in plots with RDF + soil applied PSB @ 2 kg/ha. Application of bio-products failed to exert any significant influence on residual soil K. The crop receiving RDF + soil applied Bolt GR @ 10 kg/ha gave highest gross return, net return and B:C ratio. Hence, application of RDF (60-30-30 kg N, P2O5 and K2O/ha) along with Bolt GR @ 10 kg/ha or Azospirillum @ 2 kg/ha may be recommended to achieve higher grain yield of tested cultivar Satabdi (cv. IET 4786).
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