Effect of sulfur and nitrogen nutrition on storage protein quality in mungbean [Vigna radiata (L.) Wilczek] seeds.

摘要

Field trials were conducted to observe the effect of sulfur and nitrogen nutrition on storage protein quality in mungbean seeds at maturity. Mungbean seeds of varieties PAU 911 and ML 818 were sown in the experimental fields. Soils were presupplemented with different sulfur and nitrogen sources either alone or in combinations @ 40 kg/ha. Treatments consisted of T₁ (control where neither sulfur nor nitrogen was added), T₂ (single super phosphate), T₃ (urea), T₄ (single super phosphate and urea), T₅ (gypsum), T₆ (ammonium nitrate) and T₇ (gypsum and ammonium nitrate). Different sources of sulfur and nitrogen either alone or in combinations significantly increased hundred seed weight, total nitrogen and sulfur content and decreased N:S ratio in PAU 911 and ML 818 seeds. The protein quality parameters i.e. crude protein, total soluble protein, sulfur containing amino acids (methionine and cysteine), various protein fractions i.e. albumin, globulin, glutelin and prolamins and sub-fractions of globulin i.e. legumin and vicilin were significantly increased under various treatments of sulfur and nitrogen. Among various treatments, T₅ resulted in higher increase in the various protein quality parameters as compared to other treatments.