1、Appropriate nitrogen application rate with decreased basal/topdressing

This may be due to the fact that the lower basal fertilizer ratio facilitates the transferring of N more effectively from the vegetative to the reproductive organs of the plant, allowing for more efficient utilization.

2、Is Nitrogen Fertilizer Better as Base Fertilizer or Topdressing?

In conclusion, A2, whose nitrogen fertilizer rate was 168 kg·hm −2 and the ratio of base and topdressing was 1/3:2/3, had a higher grain yield and grain protein content, and heightened N use efficiency and minimized the risk of NO 3 − -N leaching.

3、Is Nitrogen Fertilizer a Topdressing or More Effective as Such?

Whether nitrogen fertilizer is more effective as a topdressing depends on factors such as crop type, growth stage, and soil conditions. Generally, topdressing refers to applying nitrogen fertilizer directly to the soil during specific periods to meet plants’ nutritional needs.

4、Basal Vs Top Dressing: The Right Way To Apply Fertilizer For Higher

At this stage, crops require more nutrients—especially nitrogen—for rapid growth. Top dressing involves: Applying fertilizer near the plant base Using nitrogen-rich fertilizers like urea or NPK 20-10-10 Supporting vegetative growth and plant strength Benefits of Top Dressing Boosts leaf and stem development Enhances crop vigor Increases ...

5、Effect of N Fertilizer Dosage and Base/Topdressing Ratio on Potato

Overall, adopting a suitable base/topdressing ratio can promote plant growth and improve tuber quality and yield. However, the relationship between the specific application amount and the ratio under different soil texture conditions needs further study.

Effects of different ratios of nitrogen base fertilizer to topdressing

Since nitrogen fertilizer can increase the yield of sugar beet, but also reduce the sugar content, sugar yield was used to determine the optimal nitrogen base fertilizer to topdressing ratio.

Effects of Different Nitrogen Fertilizer Rates and Nitrogen Ratios of

Different nitrogen application rate and base-topdressing ratios of nitrogen fertilizer have important effects on the number of tillers and yield components at different growth stages of wheat.

Effect of topdressing time on spring maize yield and nitrogen

“One base and one topdressing” mode is currently the most common form of fertilization for maize spring in Northeast China 24, 25, 26, with 40% of nitrogen fertilizer is applied as a base...

Effects of nitrogen fertilizer rates and ratios of base and topdressing

In order to explore the optimal regime of nitrogen fertilizer application suitable for environment and economy, a field experiment on the different rate and ratio of base and topdressing of nitrogen fertilizer at the different growth periods of winter wheat was conducted.

Effects of base

This study investigated the effects of different nitrogen fertilizer application ratios of base to topdressing on the nitrogen use efficiency, leaf senescence characteristics, and cotton yield under different planting patterns with the aim of providing a rational fertilization strategy for high-yield and efficient cultivation of cotton in ...

Nitrogen fertilizer is a commonly used chemical fertilizer in agricultural production, primarily providing the nitrogen nutrition required for plant growth. While widely applied in agriculture, the question of whether base fertilizer or topdressing fertilizer yields better results depends on specific crops, soil conditions, and fertilization strategies.

I. Classification and Functions of Nitrogen Fertilizers

1. Urea: A high-nitrogen fertilizer, typically used as a base fertilizer to rapidly replenish soil nitrogen and accelerate crop growth.
2. Ammonium Nitrate: Contains a high proportion of nitrogen, suitable for topdressing due to its fast-release properties, which meet crops’ immediate needs.
3. Ammonium Chloride: Lower in nitrogen, appropriate for both base and topdressing applications. Its gradual nitrogen release minimizes soil impact.
4. Ammonium Sulfate: Moderate-nitrogen content, versatile for base or topdressing use, with lower costs.
5. Diammonium Phosphate: High-nitrogen content, often used for topdressing to promote rapid crop growth.
6. Urea and Calcium Nitrate: A composite fertilizer rich in nitrogen and calcium, suitable for both base and topdressing applications.
7. Nitrate-Sulfur-Based Compound Fertilizer: High in nitrogen and sulfur, ideal for legumes and other crops.

II. Selection Between Base and Topdressing Fertilizer

1. Base Fertilizer: Applied evenly on soil surfaces before planting and incorporated into the soil. For nitrogen-demanding crops (e.g., rice, wheat), high-nitrogen base fertilizers are recommended. Base fertilizers provide long-term nitrogen supply, supporting early growth and yield formation.
2. Topdressing Fertilizer: Applied during crop growth via irrigation or foliar spraying to address nutrient deficiencies. Targeted to supplement nitrogen losses or absorption gaps, enhancing growth and yields.

III. Comparative Effects of Base and Topdressing Fertilizers

1. Effectiveness: Base fertilizers offer prolonged nitrogen supply, benefiting early growth and yield, while topdressing addresses specific growth-stage needs with precision.
2. Soil Impact: Excessive base fertilizer may lead to soil acidification or nutrient imbalance, whereas topdressing allows balanced soil nutrients.
3. Cost: Base fertilizers require larger quantities and higher costs, whereas topdressing enables flexible, demand-driven application, reducing waste.
4. Environmental Impact: Improper base fertilizer use risks leaching and groundwater contamination, while topdressing minimizes environmental harm through controlled timing and methods.

IV. Fertilization Strategies

1. Timing: Adjust based on crop cycles and climate (e.g., spring topdressing for growth, summer for nutrient replenishment).
2. Dosage: Calibrate according to crop nitrogen demands and soil fertility to avoid overapplication.
3. Application Methods: Use trench, hole, or strip application to suit crop and soil types.
4. Techniques: Choose liquid or granular forms based on fertilizer type and crop characteristics.

V. Recommendations

1. Tailor the base-to-topdressing ratio to crop needs and soil fertility for optimal results.
2. Avoid overfertilization to prevent resource waste and pollution.
3. Adopt efficient application methods to improve nitrogen use efficiency and reduce environmental impact.
4. Customize fertilization plans for different crops and soils to maximize benefits.

both base and topdressing nitrogen fertilizers have unique advantages and limitations. Their effective use depends on adapting to specific agricultural contexts to achieve the best outcomes.