1、Studies on Application of Controlled

The effects of the CRF on welsh onion quality: Different fertilizers have different effects on welsh onion quality, and the CRF could improve the welsh onion quality obviously.

2、Nitrogen nutrition and fertilization of onions (Allium cepa L.)–A

There is no consensus on the best form of N fertilizer for onions. N use efficiency can be improved with slow- or controlled-release fertilizers. Split and band applications can improve N use efficiency. Nitrogen (N) is an essential nutrient, which often limits yield in crop production.

3、Effects of Total Basal Nitrogen Application to Chain Pots Using

We developed a method for the application of total fertilizer nitrogen within a chain pot system using a controlled release fertilizer for summer welsh onions and for winter welsh...

4、Sulfur, resin coated welsh onion, special control

The invention relates to a special controlled-release fertilizer used for scallion or onion and a manufacturing method thereof.

5、Nutrition and Fertilization of Onion

Controlled-release fertilizers are a modern option to improve nutrient use efficiency, reducing leaching and ensuring a constant release throughout the crop cycle.

Effects of Controlled

Article "Effects of Controlled-release Fertilizer on Welsh Onion" Detailed information of the J-GLOBAL is an information service managed by the Japan Science and Technology Agency (hereinafter referred to as "JST").

Controlled release fertilizer: A review on developments, applications

As a solution, controlled release fertilizers (CRFs) are discovered where nutrients can be released in a timely and gradually manner, which attempt to coincide and match with the specific nutrient demand during plant growth.

How to Apply Fertilizer to Onions? Boost Your Harvest

We’ve also discussed how to apply fertilizer to onions and common fertilizer application mistakes to avoid. By following these tips and guidelines, you can enjoy a bountiful harvest of delicious, healthy onions.

The use of controlled

From the nitrogen release rate of this fertilizer, top dressing applied three times was judged adequate in contrast to four applications prescribed for the standard application rate.

8 Tips for Fertilizing Your Welsh Onion

With the right fertilizer in hand, you're well on your way to nurturing robust Welsh onions. Next, let’s explore the ideal fertilization schedule to maximize their growth potential.

Welsh onions are a common vegetable with high nutritional demands during their growth. Using controlled-release fertilizer (CRF) can significantly improve fertilizer utilization, reduce nutrient loss, and minimize environmental pollution. Below is a detailed guide on applying CRF to promote healthy growth in Welsh onions.

I. Selecting the Appropriate Controlled-Release Fertilizer

1. Understanding Different Types

• CRFs on the market include urea-based, phosphate-based, and potassium-based formulations. Each type has distinct nutrient ratios and release rates. Choose based on soil conditions and crop needs.
• Example: Nitrogen is critical for Welsh onions. Opt for nitrogen-rich CRF to meet this demand.
• Phosphorus and potassium are equally essential. Select CRF with moderate phosphorus and high potassium content to balance nutrient uptake.

2. Consider Environmental Factors

• Tailor CRF selection to local climate and soil types.
• Example: In dry regions, choose water-soluble CRF to enhance water use efficiency. For saline-alkali soils, use salt-tolerant CRF.
• Account for pest/disease risks by choosing CRF formulations resistant to local pathogens or pests.

II. Rational Application of Controlled-Release Fertilizer

1. Determine Fertilizer Quantity

• Adjust dosage based on Welsh onion growth stages and soil fertility. Avoid over-application due to their short growth cycle.
• Use soil testing or local agricultural experience to guide amounts. For nutrient-poor soils, increase CRF slightly but avoid excess to prevent environmental harm.

2. Application Methods

• Apply CRF during key stages: sowing, transplanting, and pre-harvest.
• Before Sowing: Mix CRF with organic fertilizer and incorporate into soil.
• After Transplanting: Apply directly near roots for efficient uptake.
• Pre-Harvest: Add a topdressing to meet late-stage nutrient demands.

3. Timing

• Apply during active growth phases. For spring-planted onions, fertilize immediately after sowing. For autumn harvests, apply ~1 month before harvest.
• Avoid extreme temperatures to ensure proper nutrient absorption.

4. Application Techniques

• Use strip, hole, or furrow application methods.
• Strip/Furrow: Broadcast evenly between rows or in furrows.
• Hole Application: Place directly near roots.
• Water after application to aid nutrient dissolution and uptake.

III. Key Considerations

1. Avoid Over-Fertilization

• Excess CRF can lead to soil salinization, compaction, or pollution. Test soil nutrients or consult local guidelines to optimize rates.

2. Timely Application

• Match fertilization to growth stages. Limit nitrogen during bulb formation to avoid excessive leaf growth. Adjust timing based on climate and plant needs.

3. Do Not Mix with Pesticides

• Avoid combining CRF with pesticides, as chemical reactions may reduce efficacy or produce toxins. Consult experts before use.

4. Monitor Soil Moisture

• Ensure adequate soil moisture. Water-stressed soils require pre-irrigation before fertilizing. Overly wet soils may need reduced rates or adjusted methods.

Controlled-release fertilizers boost nutrient uptake and yield in Welsh onions when used correctly. Follow these guidelines—selecting the right type, applying rationally, and avoiding missteps—to achieve high-quality, eco-friendly production.