Effect of integrated nitrogen management on fertility status of rice soil

摘要

Field experiment with rice crop using N fertiliser, FYM, Sesbania aculeata and Azospirillum at Tamil Nadu Agricultural University farm, Coimbatore revealed that there was a depletion of all the major nutrients with the application of fertiliser N alone. Conjoint addition of green manure with fertiliser N improved the status of available N, organic carbon, NH_4-N, Olsen - P and NH_4OAc-K. A substantial increase in the fertility status was also observed with the incorporation of FYM with higher doses of N fertilisers. However, there was a drastic reduction of NO_3-N in rice soil with all the treatments studied.