Phenological and Metabolic Study of Mustard (Brassica juncea L. Czern. & Coss.) as Affected by Sulphur and Zinc Levels

The Field experiment was carried out during rabi season of 2021-22 and 2022-23 at Students Instructional Farm, Chandra Shekhar Azad University of Agriculture & Technology, Kanpur. The experiment consist of 14 treatments combinations in factorial randomized block design with three replications consisted of 7 fertility levels (including sulphur and zinc) and two varietal factors (i.e. Rohini & Maya). Mustard varieties Rohini & Maya were grown with the recommended agronomic practices. On the basis of results emanated from investigation it can be concluded that among the metabolic studies the maximum chlorophyll content at pre and post anthesis are 46.70 and 48.88 SPAD were recorded in the treatment T14 [Var. Maya with Sulphur @900 ppm] during the first year (2021-22). Maximum rate of photosynthesis at pre and post anthesis are 25.97 and 33.29 µmole m-2/ s-1 respectively, during 1st years of experimentation were associated with the treatment T14 [Var. Maya with Sulphur @900 ppm]. Similarly during 2nd year of experimentation the maximum pre and post anthesis chlorophyll content (47.27 and 49.45 SPAD) and pre and post anthesis rate of photosynthesis (26.32 and 34.50 µmole m-2/ s-1) was found in the treatment T14 [Var. Maya with Sulphur @900 ppm]. Along with this, among the phenological studies minimum number of days taken to anthesis, number of days taken to 50 % flowering and number of days taken to maturity, was also found in the treatment T14 [Var. Maya with Sulphur @900 ppm].