1、Optimum Timing of Foliar Nutrient Sprays

For an optimum yield response to foliar fertilization it is possible that the optimum growth stage of the plant for the timing of foliar nutrient sprays does not necessarily fall within the recommended time interval as dictated by pesticide spraying.

2、Spraying foliar selenium fertilizer on quality of table grape

With potential market value of different grape variety is gradually discovered, exploring grape quality and special medicine effect has important theoretical and practical significance for table grape cultivation in future.

3、Soil and foliar fertilization affects mineral contents in Vitis vinifera L. cv. ‘rebula’ leaves

Foliar fertilization is increasingly adopted in order to alleviate micro- and macro-nutrient deficiency, but the resulting changes in the distribution of other nutrients may have significant adverse effects on plant growth and yield.

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

Soil applications of fertilizers are mainly done on the basis of soil tests, whereas foliar nutrient applications are mainly done on the basis of visual foliar symptoms or plant tissue tests. Hence, correct diagnosis of nutrient deficiency is fundamental for successful foliar fertilization.

5、Foliar Fertilization for Sustainable Crop Production

Supplementing a traditional N-fertilization program with foliar applications gives growers more management options. One of these is the timing of foliar application which is based on the specific goals of production, and the benefits which are desired.

Influence of foliar applications of humic acids on yield and fruit quality of table grape cv. Italia

Significance and impact of study: This study gives new information about the positive effects of foliar application of humic acids, active components of soil and compost organic matter, on yield and fruit quality of table grape.

Changes on grape phenolic composition induced by grapevine foliar applications of phenylalanine and urea

In general, application of urea and phenylalanine improved grape quality. These practices may help to obtain grapes of higher quality. Grapevines may require the input of nitrogen to grow and to guarantee an appropriate grape composition.

Species‐specific responses of foliar nutrients to long‐term nitrogen and phosphorus additions in a lowland tropical forest

Here, we report foliar nutrient concentrations, resorption proficiency and resorption efficiency in four species of tropical trees growing in a long-term factorial N and P fertilization experiment in a mature lowland tropical rain forest.

COMPARISON OF DIFFERENT FOLIAR

Foliar fertilization is a rapid, efficient way to improve crop nutrient status during periods of high nutrient demand or when soil conditions (low tempera-ture, salinity, pH) render soil nutrients and soil-applied fertilizers less available to the plant’s roots.

Some Aspects of Epigean Nutrition of Grapevines

The nutritional needs of grapevines are very diverse and related to the production of the grapes (which in turn is related to the vegetative activity), to the form of cultivation of the vine, to the variety, to the root-stock, etc.

Foliar fertilization is a critical practice for enhancing grape yield and quality. Spraying nutrients directly onto leaves enables rapid replenishment of essential elements, promoting grapevine growth and development. the frequency and methods of application depend on the grape’s growth stage, soil conditions, and fertilizer type. Below are guidelines for effective foliar fertilization:

1. Understand the Grape Growth Cycle

• Budding Stage: In spring, as temperatures rise, grapes enter bud break. Prioritize nitrogen-based fertilizers during this phase to stimulate root development and new shoot growth.
• Vegetative Growth Stage: As temperatures increase, grapes transition to active growth. Increase foliar fertilization frequency to ensure adequate nutrient supply.
• Flowering Stage: Apply phosphorus-rich fertilizers to support flower bud differentiation and bloom development.
• Fruit Ripening Stage: Reduce or halt foliar fertilization to avoid compromising fruit quality.

2. Select Appropriate Foliar Fertilizers

• Water-Soluble Fertilizers: Easily absorbed and gentle on plants, these contain micronutrients and amino acids, suitable for all growth stages.
• Slow-Release Fertilizers: Provide sustained nutrient delivery, ideal for maintaining long-term nutritional balance.
• Organic Fertilizers: Rich in natural ingredients (e.g., seaweed extract, humic acid), they improve soil structure, boost beneficial microbes, and enhance plant resilience.
• Specialized Formulations: Targeted products (e.g., zinc- or calcium-specific) address deficiencies. Choose based on grapevine needs.

3. Determine Application Frequency

• Budding Stage: Every 7–10 days to promote root and shoot development.
• Vegetative Growth Stage: Every 7–10 days (adjust based on soil tests and plant health).
• Flowering Stage: Weekly applications with phosphorus-rich formulas.
• Fruit Ripening Stage: Cease foliar fertilization to preserve fruit quality.

4. Application Best Practices

• Dilution Ratio: Follow product instructions for proper concentration.
• Timing: Apply in morning or late afternoon to minimize evaporation and maximize absorption.
• Coverage: Ensure even distribution across leaves; avoid overconcentration to prevent burns.

5. Key Considerations

• Avoid Over-Fertilization: Excessive applications may lead to excessive growth or other issues.
• Monitor Plant Response: Halt use immediately if abnormalities arise and consult experts.
• Soil Management: Complement foliar feeding with soil improvements (e.g., deep tilling, organic amendments) to enhance fertility and aeration.

foliar fertilization is a vital technique for nurturing healthy grapevines. Proper methods, suitable fertilizer types, and rational application frequencies are essential. By following these guidelines, growers can optimize vineyard management, boosting both productivity and fruit quality.