Partial factor productivity of nitrogen, nitrogen uptake and Soil health as influenced by different establishment methods, varieties and nitrogen levels in rice under late sown conditions in Telangana state

Abstract

A field experiment was carried out during kharif, 2017 on clay loam soil at Regional Agricultural Research Station, Polasa, Jagtial. The experiment was laid out in a split plot design with three replications and twelve treatments with three main plots viz., M1: Sowing of nursery (July 20th) and transplanting of seedlings at 25 DAS (August 16th), M2: Direct seeding by Broadcasting on August 16th, M3: Direct seeding by Drum seeder on August 16th and four subplots viz., S1: RNR-15048 with 100% Recommended N (120 kg ha-1), S2: RNR-15048 with 150% Recommended N, S3: JGL-18047 with 100% Recommended N and S4: JGL-18047 with 150% Recommended N. Grain and straw yield was significantly higher in drum seeding over broadcasting which was again significantly superior over transplanting method. JGL-18047 recorded significantly higher grain and straw yield at both levels of nitrogen over RNR-15048. The physico-chemical properties and post-harvest nutrient status of soil were not significantly influenced by establishment methods, nitrogen levels and varieties. Nitrogen uptake and partial factor productivity of nitrogen was significantly higher in drum seeding over other methods. While among both varieties with nitrogen levels, JGL-18047 recorded significantly higher uptake at both levels of nitrogen over RNR-15048.