1、The Impact of Heavy Rainfall Variability on Fertilizer Application

If heavy rainfall occurs before the middle term of crop growth, foliar fertilizer can be sprayed to quickly restore crop growth by improving the photosynthesis of crop leaves. However, foliar fertilizer accounts for a small proportion of the total fertilizer use.

2、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.

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

Compared with root fertilization, foliar fertilization, as a supplementary fertilization strategy, can deliver nutrients directly to the target through aerial plant parts, thereby helping to reduce negative impacts on the soil (Bindraban et al. 2015; Fernández and Eichert 2009).

Foliar Fertilization: Novel Approaches and Field Practices

In this Special Issue, special attention is paid to various aspects of foliar fertilization, especially with regard to plant growth and development, physiological traits, incidence of diseases and pest feeding, and quantity and quality of production.

(PDF) Foliar Fertilization of Crop Plants

If foliar fertilization is mixed with postemergence herbicides, insecticides, or fungicides, the probability of yield response could be increased and cost of application can be reduced.

Research Progress on Role and Mechanisms of Foliar Fertilizer in

Research has found that when reactive oxygen species accumulate in large quantities within plants, it will reduce photosynthetic efficiency and affect crop growth.

Recent Trends in Foliar Nanofertilizers: A Review

Based on this background, this paper provides an overview of various applications of foliar spraying of nanofertilizers in agriculture, including applications in improving crop yield and quality as well as mitigating heavy metal stress, salt stress and drought stress.

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.

Improving nutrient use efficiencies with foliar applied nutrients

That said, responses to foliar sprays can also be variable and an understanding of the factors that influence the uptake, translocation and metabolism of leaf applied solutes can help overcome the ‘spray and pray’ dilemma.

The Impact of Heavy Rainfall Variability on Fertilizer

If heavy rainfall occurs before the middle term of crop growth, foliar fertilizer can be sprayed to quickly restore crop growth by improving the photosynthesis of crop leaves. However, foliar fertilizer accounts for a small proportion of the total fertilizer use.

In northern regions, applying foliar fertilization after heavy rain is a common and effective agricultural management practice. Foliar fertilizers provide nutrients by being sprayed onto plant leaves, enabling rapid replenishment of essential elements, particularly when soil conditions are poor or lack available nutrients. Below is a detailed guide on the specific operations and precautions for applying foliar fertilizers after heavy rain.

1. Advantages of Applying Foliar Fertilizer After Heavy Rain

• Rapid Nutrient Replenishment: Foliar fertilizers are directly absorbed by plant leaves, offering faster nutrient uptake compared to root fertilization. This quickly improves plant growth conditions.
• Reduced Fertilizer Usage: Foliar application requires less fertilizer to achieve optimal results due to higher absorption efficiency, minimizing waste.
• Improved Fertilizer Utilization: By avoiding nutrient loss from rainwater runoff, foliar fertilizers enhance overall utilization rates.

2. Operational Steps for Applying Foliar Fertilizer After Heavy Rain

a. Preparation Phase

• Select Appropriate Fertilizer: Choose foliar fertilizers (e.g., nitrogen, phosphorus, or potassium-based) based on specific plant needs.
• Dilute the Fertilizer: Follow product instructions to dilute the fertilizer to the correct concentration.
• Check Equipment: Ensure sprayers, nozzles, and other tools are in good working condition.

b. Application Phase

• Optimal Timing and Weather: Apply on calm or mild wind days to prevent fertilizer drift.
• Uniform Spraying: Adjust dosage and coverage based on plant growth and soil fertility, ensuring even distribution across leaves.
• Protect Sensitive Areas: Avoid direct spraying on young shoots or fruits to prevent damage.

c. Post-Application Management

• Monitor Plant Response: Observe plants closely for any abnormal reactions and address issues promptly.
• Supplement Water: Provide adequate irrigation after heavy rain to aid recovery and growth.
• Adjust Fertilization Plans: Refine future fertilization schedules based on plant performance and soil conditions.

3. Key Precautions

• Avoid Overapplication: Excessive use can lead to nutrient toxicity or stunted growth.
• Prevent Disease Risks: Foliar applications may increase fungal disease risks; implement preventive measures.
• Integrate with Other Methods: Combine foliar fertilization with soil-based approaches for balanced nutrition.

Applying foliar fertilizer after heavy rain is an efficient and environmentally friendly practice that rapidly restores essential nutrients, promoting healthy plant growth. meticulous attention to operational details and safety protocols ensures optimal results. Through scientific management and rational fertilization, agricultural productivity and sustainability can be significantly enhanced.