1、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.

2、Impact of foliar fertilization on growth, yield, nutrient dynamics and

They suggested that root activity decreased during the pod-filling stage, limiting nutrient uptake and preventing optimal yields. Foliar fertilization during this critical period was proposed as a method of increase total nutrients availability without relying on root absorption.

3、Effect of foliar application of water

The foliar application of N, P, K and S during the pod filling stage has been shown to boost soybean production by up to 31%, according to Garcia and Hanway (1976) [4].

Effects of delayed soil and foliar N fertilization on yield and N

The results obtained in these studies suggest that inadequate N supply during pod-filling limited soybean yields, and that by the judicious application of fertilizer N during the late stages of growth, it was possible to enhance soybean yields without necessarily inhibiting N 2 fixation.

Effect of foliar nutrition on soybean productivity

According to Mannan 2014, foliar spraying during the pod filling stage is more effective than during vegetative stage because nutrients applied during pod filling is readily used for photosynthesis and assimilates quickly mobilized for grain filing and protein accumulation in grain.

Effect of soil and foliar application of nitrogen during pod

Application of N at pod-filling stage either to the soil or to the foliage increased fruit-set, weight of pods, and the yield of oil and protein in seed. The most effective treatment was a foliar application of 1.0% urea.

Effects of delayed soil and foliar N fertilization on yield and N2

These results reveal that the soybean roots were active in N uptake during these late stages of growth. Nitrogen fertilization during pod-filling resulted in significant yield increases over the control treatment which received an early application of 20 Kg N/ha.

Effects of Foliar Fertilizer Application during the Seed filling period

A research study focusing on the development of technologies to increase soyabean productivity and improve seed quality through use of foliar fertilizer during the reproductive stages was conducted at Thornpark Farm (UZ Farm) during the 2006/2007 cropping season.

Effect of foliar application of fertilizers on growth and yield

Different water-soluble fertilizers can be used at different crop growth stages either alone or in combination to improve crop productivity.

Nutrient Management for Soybean Crops

These nutrients can be supplied to the plants through soil incorporation or foliar spray of commercially available fertilizers. Nutrient requirements for soybean crops vary in concentration, and deviations can cause nutrient deficiency or toxicity in soybean crops.

Soybean (also known as soybean), during the pod-filling stage, is in a critical growth phase with high nutrient demands. Proper foliar fertilization can effectively enhance yield and quality. Below are some recommended foliar fertilizers and their effects:

I. Selection of Foliar Fertilizers

1. Nitrogen Fertilizers

• Function: Nitrogen is one of the essential elements for plant growth, crucial for promoting leaf development and photosynthesis. During the pod-filling stage, appropriate nitrogen application can stimulate stem and leaf growth while improving disease resistance.
• Recommended Products: Urea, ammonium nitrate, etc. These nitrogen sources are readily absorbed by plants and act quickly.

2. Phosphorus Fertilizers

• Function: Phosphorus promotes root system development and enhances stress resistance (e.g., drought, cold tolerance). It also aids protein synthesis, significantly improving crop quality.
• Recommended Products: Superphosphate, triple superphosphate, etc. These contain high phosphorus content and provide long-lasting effects.

3. Potassium Fertilizers

• Function: Potassium regulates water balance within plants, strengthens disease resistance, and improves crop quality. Additionally, it facilitates sugar transport and conversion, boosting yields.
• Recommended Products: Potassium sulfate, potassium chloride, etc. These are easily absorbed and offer stable performance.

II. Application Methods

1. Foliar Spraying

• Operation: Use a sprayer to evenly apply foliar fertilizer onto each leaf, avoiding excessive moisture to prevent disease outbreaks.
• Precautions: Conduct spraying on sunny days, avoiding rainy or overly humid conditions. Tailor the fertilizer choice to specific crop needs.

2. Soil Application

• Operation: Mix foliar fertilizer with water and apply through irrigation systems or manual watering.
• Precautions: Perform soil testing before application to understand nutrient levels and crop requirements. Control dosage and frequency to avoid waste or soil salinization.

III. Key Considerations

1. Fertilizer Selection

• Brand Reputation: Choose well-established brands to ensure product quality and safety.
• Ingredient Check: Verify fertilizer composition for harmful substances.

2. Timing

• Optimal Period: Apply foliar sprays in the morning or evening when temperatures are lower, reducing evaporation and maximizing absorption.
• Frequency: Based on growth cycles and fertilizer properties, apply every 7-10 days.

3. Environmental Conditions

• Temperature: Avoid peak heat during spraying to prevent reduced uptake.
• Wind: Choose calm or light wind conditions for even distribution.

4. Pest and Disease Management

• Prevention First: Monitor crop health and pest issues, taking timely action.
• Integrated Management: Combine with practices like proper planting density, scientific irrigation, and pruning to enhance overall productivity.

using suitable foliar fertilizers during soybean's pod-filling stage significantly improves yield and quality. Select fertilizers based on growth stages and soil conditions, and employ proper application techniques to optimize results.