1、Response of winter rape (Brassica napus L. ssp. oleifera Metzg., Sinsk) to foliar fertilization and different seeding rates

The application of foliar fertilizers also enables the rates of basic mineral NPK fertilizers to be reduced by 25% without detriment to seed yield. Foliar fertilizers have been found to have a weaker effect on changing the chemical composition of rapeseed.

2、Foliar Fertilization for Sustainable Crop Production

Here I review the extensive work that has been carried out on the effectiveness of foliar-applied nutrients, the mechanisms of foliar absorption, and transport.

3、Boron fertilizers in rape – a risk for honey bees?

This study suggests that the application of foliar boron fertilizers in blooming rape is not hazardous for bee colonies.

4、FOLIAR NUTRITION IN CROPS

Fertilizer is a vital input in agriculture to boost the crop yields. Among the methods of fertilizer application, foliar nutrition is recognized as an important method since it facilitates easy and rapid utilization of nutrients.

5、Residual effectiveness of boron fertilizer for oilseed rape in intensively cropped rice

Long-term field experiments (3–4 years) were conducted to evaluate the residual effect of boron (B) fertilizer for oilseed rape (Brassica napus L.) in an intensive crop rotation including two rice (Oryza sativa) crops per year.

Foliar Fertilization of Crop Plants: Journal of Plant Nutrition: Vol 32 , No 6

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

Data from our laboratory and others have indicated that foliar sprays of phosphate and potassium salts can induce systemic protection against foliar pathogens in various crops such as cucumber, maize, rose, grapevine, apple, mango and nectarine.

Response of Golden Acre Cabbage to Foliar Application of Water Soluble Fertilizers on Plant Growth and Seed Yield

In such conditions foliar application of water-soluble fertilizers (WSF) is considered highly suitable for increasing seed yield because of high solubility, easy and quick absorption by plant tissues.

THE INFLUENCE OF SOIL REACTION ON THE EFFECTS OF MOLYBDENUM FOLIAR FERTILIZATION OF OILSEED RAPE

Thirty-three field trials have been carried out on soils of different acidity (pH=4.1-7.1) to investigate the effect of foliar fertilization with molybdenum on oilseed rape.

COMPARISON OF DIFFERENT FOLIAR

Thus, it is prudent to replace soil-applied fertilizer, at least in part, with foliar-applied fertilizer.

Rape bolting is a common issue in agricultural production, directly affecting the yield and quality of rape. selecting the appropriate foliar fertilizer to prevent bolting is crucial. Below, I will analyze in detail which foliar fertilizer is most suitable for preventing rape bolting from multiple perspectives:

1. Criteria for Selecting Foliar Fertilizers

a. Comprehensive Nutrition

The chosen foliar fertilizer should contain all essential nutrients for rape growth, including major elements like nitrogen (N), phosphorus (P), and potassium (K), as well as trace elements. These nutrients are vital for rape development, and deficiencies can lead to issues. For example, trace elements such as boron (B), manganese (Mn), and zinc (Zn) significantly impact photosynthesis, root development, and disease resistance in rape.

b. Biological Activity

Ideal foliar fertilizers should have biological activity, directly enhancing physiological processes, stress resistance, and immunity in crops. Some fertilizers contain natural plant extracts or bioactive substances that stimulate growth and improve pest/disease resilience.

c. Safety

Safety is a critical factor. The foliar fertilizer must be harmless to humans and the environment, non-polluting to soil, and easily degradable.

d. Applicability

Different rape varieties may respond differently to foliar fertilizers, so selection should align with specific crop types. Additionally, application methods (e.g., spraying vs. drip irrigation) affect absorption efficiency and should be optimized.

2. Common Types of Foliar Fertilizers and Their Features

a. Algae-Based Fertilizers

Algae-based fertilizers are rich in minerals and trace elements (e.g., silicon, calcium, magnesium), which benefit rape growth. They often exhibit high biological activity, promoting photosynthesis and root development. their application requires careful attention to dosage and methods.

b. Amino Acid-Based Fertilizers

These fertilizers contain amino acids and vitamins that enhance growth and disease resistance. They are rapidly absorbed by plants but come with higher costs. Concentration and dosage must be carefully controlled during use.

c. Microbial-Based Fertilizers

Microbial fertilizers introduce beneficial organisms (e.g., Azotobacter, Rhizobia) that improve soil structure and organic matter. They boost growth and pest/disease control but require precise timing and application to avoid disrupting soil microbial balance.

3. Integrated Application and Effectiveness Evaluation

a. Integrated Strategies

Combining multiple fertilizers often yields better results. For example:

• Alternate algae-based and amino acid-based fertilizers to leverage their strengths.
• Pair microbial fertilizers with algae-based ones for enhanced efficacy.

b. Monitoring and Adjustment

Regularly assess rape growth and bolting progression. Adjust fertilizer types, concentrations, or application methods based on observed outcomes to optimize results.

To address rape bolting, prioritize foliar fertilizers with comprehensive nutrition, biological activity, safety, and crop-specific applicability. Algae-, amino acid-, and microbial-based fertilizers each offer unique advantages, but the best choice depends on contextual factors. Scientific application and ongoing evaluation are key to maximizing yield and quality while effectively managing bolting.