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Title: A Guide to Fertilizer Dosage for Ratoon Sugarcane
Introduction:
Ratoon sugarcane, also known as stubble cane, is the second or subsequent crop grown from the stubble left in the field after the initial sugarcane crop is harvested. To ensure a healthy and productive ratoon crop, it is crucial to provide the appropriate fertilizer dosage tailored to the specific needs of ratoon sugarcane. In this article, we will discuss the factors to consider and the recommended fertilizer dosage for maximizing yields in ratoon sugarcane cultivation.
Factors Affecting Fertilizer Dosage:
Several factors influence the fertilizer requirements for ratoon sugarcane:
1. Soil Nutrient Status: Before applying fertilizers, it is essential to understand the existing nutrient levels in the soil. Conducting a soil test helps determine the nutrient deficiencies and guides fertilization decisions accordingly.
2. Previous Fertilizer Application: Assessing the fertilizers applied to the previous sugarcane crop will give insights into the carryover nutrients that may affect the ratoon crop. Adjustments can then be made to avoid nutrient imbalance or excess.
3. Crop Age: The age of the ratoon sugarcane determines its nutrient uptake capacity. Younger ratoons require less fertilizer initially, while older ratoons may require higher doses.
Recommended Fertilizer Dosage for Ratoon Sugarcane:
1. Nitrogen (N):
Nitrogen is a crucial nutrient required for healthy sugarcane growth. For ratoon sugarcane, it is generally suggested to apply around 120 to 150 kg of nitrogen per hectare. This dosage can be split into two or three equal applications throughout the crop cycle. The first application should be given at the time of regrowth, and subsequent doses should be applied at three to four months intervals.
2. Phosphorus (P):
Phosphorus plays a vital role in root development, energy transfer, and overall plant growth. A recommended dosage of 60 to 75 kg of phosphorus per hectare is recommended for ratoon sugarcane. It is advisable to apply the entire dose at the time of planting or regrowth.
3. Potassium (K):
Potassium is responsible for the overall strength and productivity of sugarcane plants. Applying 80 to 100 kg of potassium per hectare is recommended for ratoon sugarcane. Similar to phosphorus, it is best to apply the entire potassium dosage at the time of planting or regrowth.
4. Micronutrients:
In addition to the major nutrients mentioned above, ratoon sugarcane often requires micronutrient supplementation. The need for specific micronutrients can be determined through soil tests. Generally, adding a mix of essential micronutrients like zinc, manganese, iron, and boron through foliar sprays or soil application is beneficial.
Conclusion:
To ensure a productive ratoon sugarcane crop, providing the right fertilizer dosage is crucial. Consider the soil nutrient status, previous fertilizer application, and crop age to determine the appropriate levels. Adhering to the recommended dosage of nitrogen, phosphorus, potassium, and micronutrients will promote healthy growth, improved yields, and overall profitability in ratoon sugarcane cultivation. Remember, periodic soil testing and consultation with agricultural experts are essential for accurate fertilizer dosage calculations and adjustments specific to your farm’s needs.