Fertilization is a critical aspect of rice cultivation, directly affecting both yield and quality. To optimize fertilizer use, it's essential to understand the right amount and timing of application. The amount of fertilizer should be determined based on the nutrient requirements of rice, the existing nutrient levels in the soil, and the efficiency of the fertilizers used. Rice relies heavily on soil nutrients, especially in areas where the soil fertility is low. In our city, paddy soils are typically deficient in nitrogen, with many also lacking phosphorus and some lacking potassium. To maximize fertilizer effectiveness, it's important to combine nitrogen, phosphorus, and potassium according to soil test results and recommended formulas. In China, the current fertilizer utilization rates are roughly 30–60% for nitrogen, 10–25% for phosphate, and 40–70% for potash.
The fertilization period can generally be divided into four stages: base fertilizer, tiller fertilizer, panicle fertilizer, and grain fertilizer. Base fertilizer is applied before transplanting and should be a mix of organic and inorganic materials to ensure a steady supply of nutrients throughout the early growth phase. It should account for about 40% of the total chemical fertilizer. Tiller fertilizer is applied about half a month after transplanting to promote tillering and increase the number of effective panicles. Panicle fertilizer is usually applied 40–50 days after transplanting, helping to support the development of the panicle and spikelets. Grain fertilizer is applied later to improve grain filling and increase yield, especially in varieties with large panicles and long filling periods.
There are several fertilization methods that farmers can choose from. One approach is the "pre-promotion" method, where most of the fertilizer is applied early in the growing season. Another is the "before promotion, during control, after supplementation" method, which emphasizes balanced nitrogen application at different growth stages. A third method involves reducing early nitrogen and increasing mid-season panicle fertilizer, followed by appropriate granular fertilizer in the later stage.
In addition to these methods, there are several key considerations when applying fertilizer. First, sufficient organic fertilizer should be used to improve soil structure, enhance water retention, and provide a wide range of nutrients. Organic materials like compost, manure, and cake fertilizer are best applied as base fertilizer. Second, nitrogen application must be carefully controlled to avoid excessive tillers, lodging, and reduced grain filling. Third, phosphorus and potassium should be applied appropriately, with phosphorus as a base fertilizer and potassium as a topdressing. Finally, trace elements such as zinc, manganese, and boron can significantly improve plant health and yield when applied correctly, usually through foliar sprays at specific growth stages.
By following these practices, farmers can ensure efficient and sustainable rice production while maintaining high-quality yields.
Powder For Injection,Benzylpenicillin Potassium For Injection,Ceftiofur Sodium For Injection,Poultry Medication
Sichuan Aibang Weiye Biological Engineering Co., Ltd. , https://www.aibangpharm.com