Impact of integrated management of nitrogen fertilizers on yield and nutritional quality of potato

The aim of this study was to investigate the influence of different compositions of nitrogen (N) sources on yield and nutritional quality in potato cultivars (Solanum tuberosum L.). The experiment used a factorial arrangement as two factors in randomized complete block design. Factor (A) was nitrogen sources: control, 75% M + 25%V, 50% M + 50%V, 100% M, where M plots received nitrogen from mineral fertilizer and V plots received nitrogen from vermicompost. Factor (B) was potato cultivars (Sante and Savalan). In Sante cultivar, 75% M + 25%V produced the highest total and marketable yield. In Savalan, cultivar application of vermicompost in 75% M + 25%V and 50% M + 50%V increased significantly total and marketable yield as compared with 100% M. Application of vermicompost significantly decreases tuber nitrate content and increases nitrogen-use efficiency. In Savalan, cultivar 50% V + 50%M and in Sante cultivar 75% V + 25%M can effectively be used for improving yield and nutritional quality of tuber.