Effect of enriched biochar based fertilizers on growth, yield and nitrogen use efficiency in direct-seeded rice (Oryza sativa)

A field experiment was conducted at Norman E. Borlaug Crop Research Centre, G. B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand during kharif (rainy) 2018 to assess effect enriched biochar (EB) based fertilizers on crop growth, productivity nutrients use efficiency in direct seeded rice (DSR). Enriched i.e. biochar-1 (EB-1), biochar-2 (EB-2), Urea (UEB-1) biochar-1(UEB-2) were prepared characterized IFS laboratory, GBPUA&T, Pantnagar.The laid out randomized block design with eight treatments 100% Recommended dose fertilizer (RDF) through conventional fertilizers, 75, 100 125% RDF EB-1+UEB-1 EB-2+UEB-2 no application as control replicated thrice. Highest yield parameters DSR recorded under fertility level. Application level also gave par its significantly higher (13.5%) compared similar both the EB 75% resulted fertilizers. Nitrogen uptake by grain straw However, among these 30.70% 29.50% more agronomic (AE) apparent nitrogen recovery (ANR), respectively