1、Effect of Different Potassium Fertilizer Application Rates on the Yield

The potassium fertilizer productivity (PFP K) and potassium fertilizer agronomic efficiency (AE K) increased by 78–112.3% and 176.4–2085% compared to the K100. During the three-year period, the maximum net income of K60 reached 28,206 CNY·ha −1, which was 18.9–20.7% higher than that of K100.

2、Effective potassium management for sustainable crop production based on

Potassium (K) is an essential macronutrient for sustainable crop production. The impact of exogenous K input on soil K apparent balance has been increasingly investigated; however, the effects of K input on K reserves and crop yields in soils with different characteristics are not well understood.

3、Estimating thresholds of nitrogen, phosphorus and potassium fertilizer

In this study, we proposed a method that utilizes allowed ranges of partial nutrient balance and yield to estimate the threshold of nitrogen (N), phosphorus (P), and potassium (K) fertilizer applied to rice (Oryza sativa L.) fields in China.

4、(PDF) Potassium Management Strategy to Increase Potassium use

Efficient potassium management is essential to maximize crop yields while minimizing environmental impacts. This chapter explores strategies to enhance potassium use efficiency (KUE) in...

Timing Potassium Applications to Synchronize with Plant Demand

The common one-time basal K management practice is often not suitable to supply adequate K to the crops during peak demand phases. Besides, changes in crop establishment practices, residue retention, or fertigation require new research in terms of rate, time, or source of K application.

Optimal potassium management strategy to enhance crop yield and soil

A combination of field experiments of K fertilization and straw return using rice (Oryza sativa L.)-oilseed rape (Brassica napus L.) rotation was designed to develop an optimal K management strategy.

Identifying the critical potassium inputs for optimum yield, potassium

To achieve high crop productivity and improved soil fertility in modern agriculture, chemical fertilizers must be applied to the agricultural system (He et al., 2022b).

Optimized Application of Nitrogen, Phosphorus, and Potassium Enhances

Winter wheat yield and fertilizer application can be described using a quadratic equation, which enables the calculation of the economic optimum fertilization rate (Tan 2011).

Optimizing rates and application time of potassium fertilizer for

To address this issue, a field experiment was conducted to determine the influence of different potassium levels under a split application on yield and yield attributes of wheat crops. The...

Optimal K Management Improved Potato Yield and Soil Microbial

Optimal potassium (K) fertilizer application in potato cropping systems can effectively increase food production and mitigate soil microbial ecosystem stress.

Potassium fertilizer plays a critical role in agricultural production, significantly impacting plant growth and development. It enhances nutrient absorption, promotes root system expansion, and improves crop resilience against diseases and environmental stresses. rational application of potassium fertilizer is essential for increasing crop yields and quality.

I. Definition and Characteristics of the Potassium Fertilizer Peak Period

1. Definition: The potassium fertilizer peak period refers to the phase during plant growth when potassium demand is most urgent. This typically occurs during vigorous growth stages, such as flowering or fruit enlargement. Applying appropriate amounts of potassium during this period can substantially accelerate plant growth and boost yields.
2. Characteristics:
   • High potassium requirements during this stage.
   • Improved photosynthetic efficiency and stress resistance.
   • Enhanced soil physical properties, including water retention and fertility.

II. Fertilization Principles During the Potassium Peak Period

1. Balanced Fertilization: Adjust nitrogen (N), phosphorus (P), and potassium (K) ratios based on soil tests and crop needs to ensure comprehensive nutrient supply.
2. Optimal Dosage: Apply potassium according to soil test results and crop demands to avoid overuse (resource waste, pollution) or underuse (nutrient deficiencies).
3. Staged Application: Divide fertilizer into multiple doses aligned with crop phenology and soil conditions to maximize absorption efficiency.

III. Fertilization Methods During the Potassium Peak Period

1. Base Application: Apply potassium evenly on the soil surface before planting or transplanting, then incorporate it into the soil. Suitable for long-term potassium requirements.
2. Topdressing: Apply potassium dynamically during growth based on plant status and soil tests. Flexible for short-term needs.
3. Foliar Spraying: Dissolve potassium in water and spray onto leaves for rapid nutrient replenishment. Avoid overconcentration to prevent leaf burn or salt damage.

IV. Key Considerations During the Potassium Peak Period

1. Soil Testing: Analyze soil potassium levels and pH to guide fertilization and prevent imbalances.
2. Crop-Specific Needs: Tailor applications to potassium demands of different crops (e.g., higher for fruit trees vs. vegetables).
3. Environmental Factors: Adjust timing based on temperature, humidity, and wind to optimize uptake.
4. Safety Intervals: Avoid mixing potassium with other chemicals that may cause phytotoxicity.
5. Organic-Inorganic Combination: Integrate organic fertilizers to enhance nutrient use efficiency and reduce synthetic fertilizer reliance.

V. Evaluating Fertilization Effects During the Potassium Peak

1. Growth Indicators: Monitor plant height, stem thickness, leaf size, and color to assess potassium efficacy.
2. Yield Analysis: Measure crop output to quantify benefits. Compare methods to identify optimal practices.
3. Quality Assessment: Test parameters like sugar content, protein levels, or shelf life to evaluate improvements.

VI. Recommendations for Potassium Peak Fertilization

1. Science-Based Formulations: Use soil tests and crop requirements to balance N-P-K ratios.
2. Precise Dosage: Target application rates to avoid excess or deficiency.
3. Timely Application: Prioritize topdressing during rapid growth phases and base/foliar sprays in later stages.
4. Eco-Friendly Practices: Minimize synthetic fertilizers by combining with organics, using slow-release formulas, and avoiding environmental contamination.

effective fertilization during the potassium peak period requires soil-and-crop-tailored strategies. By adhering to these guidelines, farmers can enhance productivity, improve crop quality, and support sustainable agriculture.