1、Optimizing dose and timing of potassium application in enhancement of

A field experiment during kharif season of year 2017-18 was carried out at research farm of Bihar Agricultural University, Sabour, Bhagalpur to find the optimum level of potassium and its proper time of application with respect to nutrient content, uptake and yield of rice.

2、Dynamics of potassium concentration in paddy field water, soil and

It is recommended to improve K utilization through optimizing K fertilizer application rates, timing of fertilizer application and water management in paddy fields.

3、Nitrogen, phosphorus, and potassium fertilization affects the flowering

Five gradients of nitrogen (N), phosphorus (P) and potassium (K) fertilizer were set respectively to study the effects of nutrients on rice flowering time and flowering duration.

4、Increased rate of potassium fertilizer at the time of heading enhances

Potassium (K) is not easily assimilated into organic matter but helps to improve rice quality. Paddy yield and its quality depend on the correct time of fertilization and harvesting (days after flowering) in the field.

Potassium Fertilizer Management on Rice Cultivation

The purpose of the present study was to evaluate the effect of potassium on growth and yield of rice and to find out the best suited scheme/timing of potassium fertilizer application for rice crop.

(PDF) Optimizing dose and timing of potassium application in

To find the scope of increased dose of K fertilizer with varying time of application in rice crop with respect to K concentration, K uptake, biomass accumulation and yield; an experiment was conducted during year 2017-18 in north eastern plains of India.

When to Apply Fertilizer to Rice? Optimal Crop Growth

In this comprehensive guide, we will delve into the world of rice fertilization, exploring the importance of timing, the different types of fertilizers, and expert insights on how to optimize rice yields.

Potassium (K)

Potassium is often the most limiting nutrient after nitrogen (N) in high yielding rice systems. K fertilizer needs to be applied in adequate amounts in most irrigated rice fields.

Potassium fertilizer management on rice cultivation. Journal of

According to the results of this study, basal application of potash (traditional method) may be replaced by a late application of potash at 25 DAT (maximum tillering stage) and split...

Optimal Timing for Fertilizer Application in Agriculture

Adjusting fertilizer timing according to seasonal growth patterns is vital. For example, applying nitrogen-rich fertilizers during early spring supports plant vigor while potassium fertilizers in late summer prepare plants for winter hardiness.

The timing and methods of applying potassium fertilizer in rice fields are critical factors for ensuring healthy growth and improving yield. Potassium plays a vital role in rice development, promoting root growth, enhancing disease resistance, and improving grain quality. Mastering the appropriate timing and techniques for potassium application is essential for boosting both productivity and crop quality.

I. Optimal Timing for Potassium Application

1. Tillering Stage

• Function: Applying potassium during tillering stimulates root development and nutrient uptake. Potassium improves soil structure, enhancing water and nutrient retention, thereby providing ample resources for rice.
• Recommendation: Apply early in the tillering stage with moderate amounts to avoid overgrowth. Use drip irrigation or foliar spraying for even absorption.

2. Booting Stage

• Function: Potassium applied during booting enhances photosynthesis, promotes grain filling, and strengthens stress resistance, reducing disease risks.
• Recommendation: Apply on sunny days to prevent fertilizer loss from rain. Control dosage carefully to avoid adverse effects.

3. Maturity Stage

• Function: Pre-harvest potassium boosts protein synthesis in grains, improves quality, and increases lodging resistance, reducing yield losses.
• Recommendation: Apply approximately one week before harvest to allow sufficient nutrient accumulation. Combine with phosphorus fertilizers for optimal results.

II. Methods of Applying Potassium

1. Deep Application

• Advantages: Placing fertilizer deep in the soil (5-10 cm) improves efficiency by targeting roots and reducing runoff. Enhances soil structure over time.
• Steps: Use specialized tools to apply fertilizer uniformly at depth, avoiding uneven distribution.

2. Foliar Spraying

• Advantages: Direct absorption through leaves allows precise control and minimal disruption to plants. Ideal for supplemental applications.
• Steps: Use sprayers to coat leaves evenly. Avoid overapplication to prevent leaf burning. Complement with other methods for best results.

3. Basal Application

• Advantages: Applying fertilizer to the soil surface before planting ensures steady nutrient release, suitable for continuous rice cultivation.
• Steps: Spread fertilizer evenly, then incorporate into the soil. Ensure uniform distribution to prevent patchiness.

III. Key Considerations

1. Avoid Overapplication

• Risks: Excess potassium may cause excessive vegetative growth, disrupt cycles, and lead to soil salinity, harming roots.
• Solution: Adjust doses based on soil tests and crop needs. Balance with other nutrients (e.g., nitrogen, phosphorus).

2. Integrate with Other Fertilizers

• Synergy: Combining potassium with nitrogen or phosphorus maximizes efficiency and soil health. Tailor blends to soil and crop requirements.

3. Weather and Environmental Factors

• Risks: Heat or drought can intensify evaporation, while harsh conditions reduce fertilizer uptake.
• Solution: Adjust timing (e.g., avoid peak heat) and monitor weather. Irrigate if necessary to optimize conditions.

Strategic timing, proper methods, and careful consideration of environmental factors are key to effective potassium management in rice fields. By adhering to these practices, farmers can enhance fertilizer efficiency, improve yields, and ensure sustainable agricultural productivity.