Changes in biochemical constituents and antioxidant enzyme activity in groundnut (Arachis hypogaea L.) by the addition of coated multi-nutrient fertilization in calcareous soil

Sulphur and micronutrients play a vital in the growth development of plants due to their catalytic effect on many metabolic processes. A field experiment was conducted explore changes various biochemical constituents antioxidants enzyme activities response coated multi-nutrient fertilization. The consisted five organic acids (citric acid, humic fulvic salicylic acid) amino acid (glycine) fertilizer sources applied at different levels (0, 5, 10, 12.5 15 kg ha-1). Groundnut leaf samples were collected analyzed for such as proline, soluble protein antioxidant enzymes viz., superoxide dismutase, catalase, peroxidase carbonic anhydrase harvest stages. results revealed that, application ha-1 registered lesser proline (5.93 µmoles g-1) higher (22.2 mg content, dismutase (8.93 EU mg-1), catalase (18.2 µg H2O2 min-1 g˗1), (6.11 mg˗1) (14.8 mg-1) stage followed by fertilizer. noted with NPK control influencing enzymes. It concluded that better source improving groundnut calcareous soils.