Vol. 6, Issue 3 (2018)
Influence of sulphur on yield, quality and uptake of different nutrients by rapeseed
Author(s): Subhashis Saren and Dipankar Saha
Abstract: Two field experiments were conducted in succession (two years) to study the effect of sulphur on yield, quality and uptake of different nutrients by rapeseed crop grown in a Topic haplaquept soil. Different doses of sulphur and FYM with recommended doses (RDF) of fertilizers N, P and K along with sulphur oxidising bacteria (SOB) were used as treatment materials. Uptake of N, P, K and S were estimated at branching, flowering and harvesting stages of the crop. Yields of biomass (stover and seeds) and quality parameters (oil and protein content) of rapeseed were determined. Results revealed that highest stover (31.57 q ha-1) and seed yield (12.87q ha-1) were recorded in T7 (RDF of NPK + S at 15 kg ha-1 + FYM at 5 t ha-1 + SOB at 7.5 kg ha-1) and T8 (RDF of NPK + S at 30 kg ha-1 + FYM 2.5 t ha-1 + SOB at 7.5 kg ha-1) treated plots respectively. Highest oil content (41.9%) was recorded in T7 treatment which is 19.6 percent more over control. Highest protein content (22.8%) in the seeds was recorded in T8 treated plot which is 16.2% more over control. Uptake of N, P, K and S by stover was found more at branching and flowering stage in T7 followed by T8 treated plot. Application of higher dose of S along with sulphur oxidising bacteria (SOB) resulted higher seed yield of rapeseed. Lowest N: S ratio of 3.68 was observed in T7 treatment which indicates that FYM plays important role in narrowing down the N:S ratio.