1、What Happens When Strawberries Are Continuously Fertilized with High

Overapplication of high-potassium fertilizer can stunt strawberry growth or induce physiological disorders. Excessive potassium inhibits the roots’ ability to absorb nitrogen, leading to nitrogen deficiency, which disrupts normal growth.

2、Metabolomic combined with transcriptome analysis revealed the

Potash fertilizer substantially increased fructose production and fruit quality. Potash fertilizer is important for improving fruit quality, but its specific moderating roles must be further explored.

3、Effects of multiple N, P, and K fertilizer combinations on strawberry

In this study, we employed an orthogonal experimental design (T1-T9) with three fertilization treatments (N, P, and K) at three levels to identify an optimal fertilization scheme for strawberry cultivation.

4、Effect of Potassium Source and Dose on Yield and Quality of Strawberry

During the strawberry fruiting period, potassium requirements increase to meet fruit needs [8] [9], which contains a large proportion of potassium. Po-tassium is thus considered a determinant of strawberry quality parameters such as sugar content, vitamin C content and fruit acidity [10].

5、Comprehensive evaluation of the optimal rates of irrigation and

The excess potassium in the high potassium fertilizer treatment (K1) was not fully absorbed and utilized by strawberries, which led to excessive K residues in the soil.

10.11648.j.jps.20261004.13

Potassium is considered a determining factor in the quality of strawberries, since sugar and vitamin C levels as well as fruit acidity tend to increase with the potassium fertilization dose. In addition, potassium plays an essential role in the transfer of assimilates to the fruits.

Effect of Potassium Source and Dose on Yield and Quality of Strawberry

Indeed, increased potassium levels in the nutrient solution stimulates the strawberry plant's growth by increasing carbohydrate synthesis activity due to the increased chlorophyll content [40...

The Effect of Potassium–Nitrogen Balance on the Yield and

This research aims to evaluate the effect of the potassium–nitrogen balance on strawberry productivity and quality parameters in soilless conditions. A trial was conducted at the Agronomic and Veterinary Hassan II Institute glasshouse in Rabat, during the 2018–2019 crop year.

Optimizing Strawberry Growth and Fruit Quality through Fertigation

Considering the importance of fertigation management in the hydroponic systems, the present study aimed to assess the frequency of fertigation and foliar application of potassium sulfate in a soilless culture of strawberries.

Influence of organic and mineral fertilizers and a foliar biostimulant

The objective of this study was to evaluate the effects of single or combined applications of organic fertilizers (poultry manure, coffee pulp), chemical fertilizer and a biostimulant (Bioval) on the yield and mineral quality of strawberries.

Strawberries are plants with demanding soil requirements, and potassium fertilizer plays a critical role in their growth and fruit quality. As an indispensable nutrient in strawberry production, potassium significantly impacts development, fruit characteristics, and stress resistance. This article explores strawberries’ demand for potassium and its importance.

I. The Demand for Potassium Fertilizer in Strawberries

1. Promotes Root Development: Potassium strengthens root systems, enhancing water and nutrient absorption. Robust roots improve overall nutrient uptake, supporting healthy growth.
2. Increases Disease Resistance: Potassium regulates acid-base balance within plants, inhibiting pathogen growth and reducing disease incidence.
3. Enhances Fruit Quality: It improves sweetness, color, and firmness by participating in sugar metabolism, elevating taste and market appeal.
4. Boosts Yield: Adequate potassium increases photosynthesis and nutrient accumulation, directly improving productivity.
5. Supports Flower Bud Formation: Critical for hormonal balance, potassium ensures successful differentiation of flower buds, foundational for high yields.
6. Improves Stress Tolerance: Regulates water balance, enabling strawberries to withstand drought, cold, and other adverse conditions.

II. Why Are Strawberries Highly Dependent on Potassium?

1. High Potassium Requirements: Strawberries are potassium-demanding crops, requiring approximately 2–3 kg of potassium per 100 kg of fruit produced.
2. Long Growth Cycle: Continuous nutrient needs across multiple growth stages necessitate sustained potassium supply.
3. Vulnerability to Stress: Sensitivity to pests, drought, and temperature extremes makes potassium’s role in resilience crucial.
4. Economic Targets: High yields and premium fruit quality (sweetness, appearance) rely on optimal potassium, directly impacting market competitiveness and profitability.
5. Sustainable Practices: Efficient potassium use reduces environmental harm while maximizing returns, aligning with sustainable agriculture goals.

III. Guidelines for Optimal Potassium Application

1. Soil Testing: Analyze soil potassium levels to determine precise dosages, typically 2–3 kg per 100 kg of strawberries.
2. Choose the Right Fertilizer:
   • Acidic/sandy soils: Sulfate of potash or potassium chloride.
   • Neutral/clay soils: Potassium nitrate.
3. Application Methods:
   • Base application: Incorporate into soil pre-planting.
   • Topdressing: Apply during growth stages.
   • Foliar spraying: Use diluted solutions for quick absorption.
4. Timing and Frequency:
   • Prioritize early growth (sprout stage) and flowering.
   • Avoid excess near maturity to prevent quality issues.
   • Apply every 7–10 days as needed.
5. Avoid Overfertilization: Excess potassium can harm roots and soil health. Follow “small doses, frequent applications.”
6. Integrated Soil Management:
   • Maintain soil moisture and structure via tilling and organic matter.
   • Pair with compost to boost long-term fertility.
7. Environmental Responsibility: Minimize waste by reusing leftover fertilizers and prioritizing eco-friendly products.

Strawberries demand significant potassium due to their physiological needs and economic value. Proper potassium management—through scientific application and soil care—maximizes yield, quality, and sustainability, delivering superior returns for farmers.