Effect of nitrogen and phosphorus on yield attributes, seed and oil yield of Indian mustard (Brassica juncea)

Abstract

A field experiment was conducted during the winter seasons (rabi) of 1989-90 and 1990-91 at Parbhani, to study the effect of N (Nu, N,, and N,,,; 0,50 and 100 kg Nlha) and P (0,40 and 80 kg P,O,/ha) levels on yield attributes, seed and oil yields, of 4 varieties (Pusa Bold, PR 18 T 59 and Local) of Indian mustard [Brassica juncea (L.) Czernj. & Cosson] variety Pusa Bold recorded significantly higher values of yield attributes, seed and oil yieldsha than PR IS, T 59 and Local. Each higher level of nitrogen significantly improved all the yield attributes. There was linear increase in seed yieldlha due to nitrogen level from 0 to 100 kg Nha during second year and in pooled; however, during first year 100 and 50 kg N h a were at par and significantly superior to no nitrogen. Nitrogen levels did not influence the oil content. There was linear increase in oil yield with the increase in N levels from 0 to 100 kg Nlha during second year, but during first year 50 and 100 kg Nlha were at par and superior to no nitrogen. Every increase in the level of phosphorus significantly improved all the yield attributes, seed yieldlha, oil content and oil yield of Indian mustard,