1、Effects of Foliar Fertilization: a Review of Current Status and Future

Foliar fertilizer application after soil fertilization is an effective method to increase the contents of trace elements in crops and crop yield, and to improve the soil environment. However, the application of inorganic foliar fertilizer results in difficulties in nutrient absorption and migration in plants.

2、Is Foliar Fertilization Related to Temperature?

foliar fertilization is closely tied to temperature. Practical implementation should consider plant type, growth stage, weather, and other factors to optimize timing and methods.

3、Foliar nutrition: Potential and challenges under multifaceted

The potential of foliar fertilization in improving crop yield and quality under environmental stresses has been evaluated based on a meta-analysis. Foliar-applied fertilizers showed higher crop plants yield and quality traits by 15–19% and 9–29%, respectively, under different environmental stresses.

Foliar Fertilizers When and How to Apply for Optimal Results

Apply foliar fertilizers during early morning (6-10 AM) or late evening (6-8 PM) when temperatures are cooler, humidity is higher, and stomata are open for maximum nutrient uptake. What concentration should I use for foliar fertilizer applications?

The Impact of Foliar Fertilization on the Physiological Parameters

The application of basic mineral fertilizers in combination with foliar fertilization had a significantly positive impact on the quality indicators of soybean seeds. The highest yields were achieved when the foliar treatment was applied in the early pod formation stage.

Optimum Conditions for Foliar Treatments

The optimum air temperature is 12-20°C (acceptable lower temperature from 4°C, acceptable upper temperature up to 25°C). Foliar fertilizers are most often used together with pesticides. Therefore, it is important that the label indicates the air temperature at which the pesticide is effective.

(PDF) Effect of Foliar Fertilization on the Physiological Parameters

As an indicator read by the device, photosynthesis was chosen for leaf temperature and leaf transpiration, correlated with production and quality indices. By applying the foliar fertilizer...

Foliar Fertilization of Crop Plants

Nutrient concentration and day temperature should be optimal to avoid leaf burning and fertilizer source should be soluble in water to be more effective. Foliar fertilization of crops can complement soil fertilization.

Foliar nitrogen and phosphorus fertilization

Foliar fertilization is more demanding with respect to technical knowledge and management skills than is the conventional use of solid fertilizers. If not carried out appropriately, foliar fertilization with nitrogen or phosphorus will imply a considerable risk of causing negative yield responses.

Foliar Fertilization of Nutrients

Foliar fertilization has been widely adopted in modern crop management where it is used to ensure optimal crop performance when nutrient supply from the soil is inadequate or uncertain.

Foliar fertilization is an efficient method for supplementing plant nutrients. It involves spraying fertilizers directly onto plant leaves to promote growth, increase yields, and improve quality. Selecting the appropriate temperature for foliar spraying is critical, as varying temperature conditions affect nutrient absorption efficiency and plant performance. Below is a detailed discussion of the optimal temperature considerations for foliar fertilization:

I. Optimal Temperature Range for Foliar Fertilization

1. Recommended Temperature: The ideal temperature range for foliar spraying is 18–25°C, which ensures effective absorption and utilization of nutrients by plants.
2. Minimum Temperature: Below 10°C, plant metabolic activity slows, reducing the effectiveness of foliar fertilization. In winter or colder regions, avoid spraying during early morning or evening.
3. Maximum Temperature: Above 35°C, high temperatures risk leaf scorching and hinder normal growth. During summer heatwaves, avoid spraying under direct sunlight.

II. Impact of Temperature on Foliar Fertilization Efficacy

1. Rising Temperatures: Warmer conditions enhance enzyme activity in plants, improving nutrient transport and conversion. This boosts absorption efficiency and fertilization outcomes.
2. Cooling Temperatures: Low temperatures reduce leaf transpiration and evaporation, limiting nutrient uptake after spraying.
3. Large Temperature Fluctuations: Significant diurnal温差 may disrupt nutrient absorption. Choose mild weather for foliar spraying during seasons with extreme temperature variations.

III. Relationship Between Temperature and Fertilizer Types

1. Water-Soluble Fertilizers: These are absorbed quickly at higher temperatures (e.g., 18–25°C) and are suitable for most plants.
2. Oil-Based Fertilizers: Oily components dissolve better at lower temperatures (e.g., spring or autumn), enhancing nutrient absorption.
3. Suspension Fertilizers: These remain effective across temperatures but are best applied in early morning or evening to minimize light-induced degradation.

IV. Key Considerations

1. Avoid Midday Heat: Spray during early morning or evening to prevent high leaf temperatures from reducing absorption.
2. Ensure Ventilation: In humid conditions, improve airflow to reduce leaf moisture and disease risks while accelerating nutrient uptake.
3. Prevent Soil Degradation: Rotate application areas to avoid salt buildup and soil structure damage from repeated use.

V. Conclusions and Recommendations

1. Temperature Selection: Tailor spraying times to plant species, growth stages, and local climate. Aim for 18–25°C as the baseline.
2. Timing Adjustments: Early morning or evening applications minimize temperature stress. Avoid peak heat.
3. Fertilizer Matching: Use soil tests and plant needs to choose formulations (e.g., water-soluble for general use, oil-based for specific crops).
4. Monitor and Adapt: Observe plant responses and soil conditions, refining strategies for optimal results.

Foliar fertilization is highly effective when temperature, fertilizer type, timing, and application methods align. By prioritizing these factors, plants can fully utilize nutrients for enhanced growth and productivity.