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、Foliar calcium fertilization reduces fruit cracking in pomegranate (Punica granatum cv. Ardestani)

Calcium foliar treatment with the nano-Ca fertilizer at 0.50 g Ca L −1 and 1% CaCl 2 (in the both seasons) and also 2% CaCl 2 (only in the second season) decreased significantly fruit cracking when compared with the control treatment, resulting in increases in marketable fruit yield.

3、Foliar Calcium Applications for Controlling Fruit Disorders and Storage Life in Deciduous Fruit Trees

Calcium is involved in several disorders and influences the storage life of different fruit species. Moreover, applying preharvest foliar Ca spray is a standard practice to control fruit Ca concentration in certain deciduous fruit trees.

4、APPLICATION AND TIMING EFFECTS OF QOI AND DMI FUNGICIDES AND A FOLIAR FERTILIZER ON OVERALL PLANT HEALTH AND GRAIN YIELD IN CORN

Multiple measurements were conducted throughout the growing season to determine the effects of several common foliar xvi fungicides and a foliar fertilizer on different indicators of plant health.

5、EFFECTS OF FOLIAR AND SOIL CALCIUM APPLICATION ON YIELD AND QUALITY OF TABLE GRAPE CV. ‘THOMPSON SEEDLESS’

The objectives in this study were to investigate the effects of calcium fertilization on table grape nutrition and quality. A two-year field trial was conducted in central Chile, using grapevines (Vitis vinifera) cv. ‘Thompson seedless’, grown on an overhead trellis system.

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.

The significance of magnesium for crop quality

In fruits and vegetables, ratios of Mg to other nutrients like Ca and K were shown to be a more reliable indicator of the quality response than the Mg status alone. Moreover, it is concluded that Mg doses beyond those required for maximum yield rarely induce a further improvement of produce quality.

Influence of calcium and magnesium based fertilizers on fungal diseases, plant growth parameters and fruit quality of three varieties of tomato

Applications of T3 also led to the reduction of the incidence and severity of Fulvia fulva on the leaves of both Rio Grande and Rio de Grenier 21 d.a.f.a. T3 was very effective in enhancing the growth in length and yield of Rio Grande and Rio de Grenier plants.

Foliar application of calcium and magnesium improves growth, yield, and essential oil yield of oregano

Applications of Ca 2+ and Mg 2+ decreased the number of days required for oregano plants to flower by an average of 3–4 days compared with the control. Dry matter yield also increased 22% with Ca 2+ and Mg 2+ during the 2-year study and at both locations compared with the control treatment.

Crop response to magnesium fertilization as affected by nitrogen supply

The maximum yield forming effect of fertilizer magnesium can occur under conditions of relatively low nitrogen supply (soil + fertilizer nitrogen), provided there is a sufficiently high supply of magnesium.

Calcium-magnesium foliar fertilizer is a commonly used plant nutrient supplement containing essential microelements like calcium and magnesium. It plays a critical role in promoting plant growth, development, and disease resistance. As a major fruit crop, grapes have high nutritional demands during their growth cycle. Applying calcium-magnesium foliar fertilizer effectively addresses these needs.

I. Optimal Stages for Applying Calcium-Magnesium Foliar Fertilizer to Grapes

1. Seedling Stage: During the early growth phase, grape root systems are underdeveloped and absorb nutrients inefficiently. Applying foliar fertilizer at this stage rapidly supplements essential nutrients, boosts root development, enhances nutrient uptake, and improves stress and disease resistance.

2. Pre-Flowering Foliar Spray: Spraying before flowering improves flower bud differentiation and fruit quality. Calcium regulates plant hormone synthesis, while magnesium supports chlorophyll production and photosynthesis. Together, they enhance floral development and fruit characteristics.

3. Post-Flowering Foliar Spray: Application after flowering increases yield and fruit quality. Calcium activates enzymes involved in nutrient transport, while magnesium participates in metabolic processes, collectively promoting growth and productivity.

4. Fruit Enlargement Stage: Spraying during this period strengthens disease resistance and post-harvest storage capabilities. Calcium enhances enzymatic activity for nutrient distribution, while magnesium supports metabolism, improving both growth and resilience.

5. Post-Harvest Top-Dressing: Applying fertilizer after harvest replenishes depleted nutrients, ensuring robust nutrition reserves for the next growing season.

II. Application Methods for Calcium-Magnesium Foliar Fertilizer

1. Dilution Ratios: Adjust dilution based on plant needs and soil conditions:

   • Seedlings: 50-100 ml per mu.
   • Pre/Post-Flowering: 200-300 ml per mu.
   • Fruit Enlargement: 300-500 ml per mu.

2. Timing: Apply in early morning or late afternoon when leaf surface tension is high, maximizing absorption. Avoid midday heat to prevent fertilizer burn.

3. Spraying Technique: Mix with water and apply evenly across leaves. Ensure full coverage for balanced nutrient distribution.

4. Precautions:

   • Avoid overapplication to prevent damage.
   • Do not mix with other fertilizers.
   • Monitor plants closely and address abnormalities promptly.

The optimal periods for applying calcium-magnesium foliar fertilizer to grapes include the seedling stage, pre/post-flowering, fruit enlargement, and post-harvest. Adjust dilution ratios, timing, and methods based on specific growth stages and environmental conditions to ensure effective nutrient utilization.