Impact of Different Nitrogen Management Practices on Soil Properties in Rice Ecosystem

A field experiment was conducted during Kharif 2011, to study the impact of nitrogen management practices on soil properties, growth and yield of rice. Soil samples were collected at tillering stage, panicle initiation stage and after the harvest of crop analyzed for physico-chemical properties. The treatments include control, 100% RDF only (no FYM), 100% RDN through FYM, UAS(B) package (100:50:50+10ton FYM) + 20 kg Zn SO₄/ha, STCR approach (154:64:72+10ton FYM)/ha, 50%N +100% PK (basal) + balance N through Leaf Color Chart, 50% RDN +25% N through GLM + 25% N through FYM, 100% P&K (basal), 50% RDF + 50% Nitrogen through FYM, 50%RDF +50% Nitrogen through green leaf manure. The results indicated that soil pH (6.53), organic carbon(0.44%) was decreased significantly in the treatment 100% RDF only (no FYM) and improvement of soil pH(6.82) and organic carbon(0.68%) was observed in 50% RDN + 25% N (GLM) + 25% N (FYM). significant increase in available nitrogen (391.3 kg ha⁻¹), phosphorus (55.2 kgha⁻¹), potassium (236.8 kg ha⁻¹) contents were observed in STCR approach (154:64:72+10ton FYM)/ha treatment.