Sulphur (S) is a vital macronutrient in crops, essential for protein synthesis, chlorophyll formation, and enzyme activity, often acting as the fourth major nutrient after NPK. It enhances crop yield and quality by improving nitrogen metabolism, oil synthesis in oilseeds, and stress resistance.
Key functions and benefits of sulphur in crops include:
Protein and Enzyme Synthesis: Sulphur is a structural component of essential amino acids (cystine, cysteine, methionine) needed for protein formulation. It is critical for the formation of enzymes that regulate plant metabolism.
Chlorophyll and Photosynthesis: It is required for chlorophyll formation, which directly affects the plant’s ability to produce sugars, starches, and oils.
Nitrogen (N) Efficiency: Sulphur and nitrogen interact synergistically; adequate sulphur allows for efficient nitrogen utilization and conversion, preventing wasted fertilizer.
Crop Quality and Yield: It boosts the production of vitamins, improves flavour in crops, and is critical for oil synthesis in oilseeds.
Soil and Plant Health: Sulphur helps reduce soil pH, improves the availability of nutrients like phosphorus, and acts as a fungicide.
Deficiency Symptoms: Because it is immobile in the plant, deficiency appears as yellowing (chlorosis) in young, top leaves, along with stunted growth.
Adequate sulphur is particularly crucial for oilseed crops, legumes, and forages to maximize growth and yield.
