DRYMATTER PRODUCTION AND NUTRIENT UPTAKE BY FODDER SORGHUM - INDIAN MUSTARD SEQUENCE AS AFFECTED BY NUTRIENT MANAGEMENT

Abstract

An investigation was carried out during kharif and rabi season of 2003-04 and 2004-05 to study the effect of nutrient management on dry matter production and nutrient uptake by fodder sorghummustard sequence. The results revealed that biomass production, N and P uptake by sorghum were significantly higher due to RDF (60 kg N + 30 kg P2O5/ha). It was on par with half RDF + biofertilizers in drymatter production. RDF produced 52.5 and 39.5 per cent more drymatter than control in 2003 and 2004, respectively. Previously applied RDF to sorghum has significantly increased the drymatter production and N and P uptake by mustard. Among directly applied nutrients, RDF (80 kg N + 40 kg P2O5/ha) was significantly superior in biomass production, N and P uptake by mustard as well as fodder sorghum-mustard sequence. Mustard under RDF the removed 62.7 and 70.0 per cent more N and 146.1 and 109.0 per cent more P than control, in 2003-04 and 2004-05, respectively. Fodder sorghum-mustard sequence extracted 150.8 kg N and 49.8 kg P/ha from directly applied RDF.