1、Optimal Timing for Applying Potassium Fertilizer to Mid

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.

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

The application of P and K fertilizers had no significant effects on the duration of rice flowering. The above evidence indicated that fertilization is an important measure to regulate flowering in rice production.

3、Timing Potassium Applications to Synchronize with Plant Demand

Science-based K application in crops needs to follow 4R Nutrient Stewardship to ensure high yield, improved farm income, and optimum nutrient use efficiency. Studies around the world report widespread K deficiency, ranging from tropical to temperate environments.

Estimating thresholds of nitrogen, phosphorus and potassium fertilizer

This study proposed a systematic method for estimating the optimum ranges of N, P and K fertilizer for rice cultivation in China, which hinges on dual principles: nutrient balance and rice yield levels.

Optimizing dose and timing of potassium application in enhancement of

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 is the best time to apply potassium fertilizer to rice for high

When is the best time to apply potassium fertilizer to rice for high yields? Potassium should be applied during the basal fertilization stage, as a top dressing during the tillering stage, and as a top dressing during the heading and flowering stages.

Potassium fertilizer management on rice cultivation. Journal of

Based on the two strong investigations, yield, yield components and nutrient use efficiency were responded to different application time of potassium fertilizer. T6 (½ potash applied at 25...

Characteristics of Potassium Utilization and Crop Yield

When the K fertilizer application rate increased to 180 kg K 2 O·hm -2 during the rice season, the K balance transitioned from deficit to surplus, while in the rapeseed season, 60 kg K 2 O·hm -2 was required to achieve surplus.

(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.

Integrating optimal fertilizer placement strategy and row configuration

In summary, optimizing fertilizer placement intervals and row configuration can enhance yields, economic benefits, and environmental sustainability in direct-seeded rice. 1. Introduction.

The timing and methods of applying potassium fertilizer to rice are critical to ensuring healthy growth and high yields. Below is a detailed explanation of the best practices for potassium fertilization in rice:

I. Optimal Fertilization Timing

1. Tillering Stage: Applying potassium during the tillering stage is one of the most crucial periods. At this stage, rice plants are rapidly growing and have a high demand for potassium. Potassium fertilizer promotes root development, enhances lodging resistance, improves photosynthetic efficiency, and increases yield. Adequate potassium application during tillering significantly accelerates growth and strengthens disease resistance.

2. Jointing and Booting Stage: Potassium application during jointing and booting is equally important. As rice enters a phase of accelerated growth, potassium supports stem strength (to prevent lodging), boosts grain-filling rates, and improves overall productivity. Proper application during this period ensures stable and high yields.

3. Heading Stage: Potassium should not be neglected during heading. Although demand decreases compared to earlier stages, moderate potassium application improves grain quality and final yields. This prepares the crop for maturation and harvest.

4. Maturity Stage: Even at maturity, some potassium is beneficial. While the need is minimal, proper application aids nutrient storage, stress resistance, and lays a foundation for future planting cycles.

II. Fertilization Methods

1. Base Fertilizer: Incorporate potassium into base fertilizers to provide foundational nutrients. Typically, apply 5-10 kg of potassium per mu of paddy field to ensure sufficient supply throughout the growth cycle.

2. Topdressing: Supplemental applications (topdressing) are essential during critical growth stages (tillering, jointing, booting, and heading). Combine potassium with nitrogen and phosphorus fertilizers for balanced nutrition, adjusting based on plant health and soil conditions.

3. Foliar Spraying: A practical method for direct absorption. Dissolve potassium in water and spray onto leaves to enhance disease resistance and grain quality. Especially useful in large-scale farming or rainy seasons.

4. Soil Testing: Conduct soil tests before fertilization to assess potassium levels, pH, and nutrient absorption capacity. This guides precise fertilization strategies and helps monitor long-term soil health.

The optimal periods for potassium application in rice are tillering, jointing-booting, heading, and maturity. Combining base fertilizer, topdressing, foliar spraying, and soil-tested approaches ensures effective results. Scientific fertilization practices are key to maximizing rice yields and quality.