Nitrogen supplementation with rice straw in an Ustochrept

Effectiveness of rice straw in combination with different proportions of urea in supplying nitrogen to rice and wheat, grown in sequence, was studied in field. Straw and urea combinations registered lower grain yield of rice than integrated use of conventional manures and urea. A very high dose of urea with rice straw was necessary to get good yield. At early growth stages of rice, straw-urea materials recorded higher N uptake but they failed to compete with manures at latter stages. Use of dhaincha plus urea in 1: 1 ratio was found to be the best in terms of yield and N uptake by rice. Beneficial effect of straw incorporation could not be observed in succeeding wheat crop also.