Rice is a staple food crop that requires specific nutrient inputs for optimal growth and yield. For every 500kg of rice produced, the plant absorbs approximately 7.5–9.55kg of nitrogen (N), 4.05–5.10kg of phosphorus (P₂O₅), and 9.15–19.1kg of potassium (K₂O). The N:P:K ratio typically ranges from 2:1:2 to 2:1:4, depending on the variety and environmental conditions. This nutrient uptake pattern highlights the importance of balanced fertilization throughout the growing season.
In addition to macronutrients, rice also absorbs a significant amount of silicon—about 87.5–100kg per 500kg of grain produced. Silicon plays a crucial role in strengthening the plant’s cell walls, improving resistance to pests and diseases, and enhancing overall plant health. To maintain soil fertility and ensure sufficient silicon availability, it is recommended to return rice straw to the field or apply silicic acid-based fertilizers during high-yield cultivation practices.
The nutrient absorption pattern of rice varies throughout its growth stages. During the seedling stage, nutrient uptake is relatively low. As the plant progresses into the tillering and vegetative growth phases, nutrient demand increases significantly. The peak nutrient uptake usually occurs just before heading, when the plant is preparing for reproductive development. After this point, nutrient absorption gradually declines as root activity decreases and the plant focuses on grain filling.
Nitrogen uptake is highest during the tillering stage, accounting for up to 50% of the total seasonal requirement, followed by the panicle development stage. However, this can vary among different rice varieties. Phosphorus is most actively absorbed during panicle development, making up about 50% of the total uptake, with a secondary peak during the tillering phase. Even during the maturity stage, rice continues to absorb a notable amount of phosphorus. Potassium, on the other hand, is taken up most intensively before heading, while its uptake drops significantly after this stage.
While increasing fertilizer application may boost nutrient uptake, it's important to distribute nutrients properly within the plant to maximize yield and avoid imbalances. Over-application or improper distribution can lead to reduced productivity. In addition to the primary nutrients, rice also requires micronutrients such as iron, boron, zinc, molybdenum, and copper for healthy growth. Ensuring adequate supply of these elements is essential for achieving high-quality and high-yield rice crops.
Extra Light Safety Shoes,Extra Light Comfortable Shoes,Rubber Outsole Shoes,Eva Rubber Outsole Shoes
Brightway Shoes Co., Ltd. , https://www.brightwaysafety.com