Nutrient management in sugarcane

Sugarcane is a long-duration, heavy-feeding crop that requires a steady supply of nutrients from planting to harvest. Proper nutrient management is essential for achieving good cane height, strong stalks, high juice content, and better sugar recovery. Since the crop remains in the field for almost a year, maintaining soil fertility and giving nutrients at the right time directly affects the final yield. Farmers who follow balanced nutrient practices get healthier crops and higher profits.
The first step in nutrient management begins with land preparation. Sugarcane responds very well to organic matter, so farmers should apply 20–25 tonnes of well-decomposed farmyard manure (FYM) or compost per hectare before planting. This improves soil structure, water-holding capacity, and microbial activity. It also helps in the gradual release of nutrients, supporting the crop during the early stages. Organic matter should always be properly decomposed; using fresh manure increases pest and disease risk.
Sugarcane needs three major nutrients—nitrogen (N), phosphorus (P), and potassium (K). Each nutrient plays an important role. Nitrogen supports rapid shoot growth and tillering, phosphorus encourages strong root establishment, and potassium strengthens plant cells and improves juice quality.
A commonly recommended fertilizer dose for sugarcane is 150–250 kg nitrogen, 60–80 kg phosphorus, and 60–120 kg potassium per hectare, depending on soil type and crop variety. Phosphorus and potassium are usually applied at planting because they stay in the soil and act slowly. Nitrogen, however, should be applied in splits for better absorption and reduced wastage.
The first nitrogen application is given at planting or within 30 days, supporting sprouting and early tiller formation. The second and larger portion is given 60–90 days after planting, during the peak tillering stage. A third split may be added around 120 days, especially in ratoon crops (second-year growth) or in sandy soils. Applying nitrogen in splits helps match the crop’s growth stages and increases fertilizer efficiency.
Ratoon sugarcane requires slightly different nutrient management because the soil gets exhausted after the first crop. Before starting ratoon management, farmers should remove the old trash and apply organic manure. Nitrogen requirement for ratoon crops is usually higher because they need quick vigour and stronger early growth.
Micronutrients also play a key role in sugarcane growth. Nutrients like zinc, boron, iron, and magnesium help improve cane thickness, leaf health, and sugar content. Zinc deficiency is common in many soils and shows up as yellowing or stunted cane. Applying zinc sulphate or spraying micronutrient mixtures helps correct deficiencies quickly. Boron supports sugar movement inside the stalk and improves cane quality.
Irrigation management and nutrient management go hand in hand. Sugarcane absorbs nutrients best when soil moisture is adequate. Moisture stress during early stages reduces tillering, while excessive irrigation leaches nutrients from the root zone. Light irrigation after fertilizer application ensures proper uptake.
Mulching with cane trash is also beneficial. It conserves soil moisture, reduces weed growth, and slowly releases nutrients as the trash decomposes. Mulching is especially useful in ratoon crops.
In simple words, good nutrient management in sugarcane includes applying organic manure, giving balanced NPK fertilizers, correcting micronutrient deficiencies, splitting nitrogen doses, and ensuring proper irrigation. When these steps are followed throughout the year, sugarcane grows vigorously, produces heavier stalks, and gives higher sugar yield.