Nutrient and Water use Efficiency, Nutrient Uptake and Rice Yield as Influenced by Fertigation Levels and Weed Management Practices

A field experiment was carried out at AICRP on Weed Management Research Farm, Department of Agronomy, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola during kharif 2020-21. Fertigation is the technique supplying dissolved fertilizers to crops through an irrigation system.The laid in split plot design with three replications and twenty treatment combinations having four different fertigation levels five weed management practices. The results revealed that, significantly maximum grain yield rice (5103 kgha-1), straw (7268 kgha-1) harvest index (41.25%) were found 125% RDNK level 5 splits than lower (75 100 per cent) over conventional soil application cent RDF. Nutrient use efficiency (NUE) better drip of75 recommended dose N K ha as compared fertilizers. Among herbicides, directed spray Pretilachlor + Pyrazosulfuron Ethyl @ 0.615 a.i. kgha-1 PE fb. Bispyribac sodium 0.025 a.i 25 DAS resulted (5231 also total nutrient uptake by crop water indicating feasibility using herbicides for effective enhancing NUE WUE. recorded Gross Monetary returns (₹120353 ha-1), Net Returns (₹72924) B:C ratio (2.54), efficiency.The herbicidal Ethyl0.615 registered GMR (₹128755 NMR (₹81412ha-1) (2.72) among all treatments, rice.