1、Nitrogen topdressing timing influences the spatial distribution

We aimed to reveal the effects of nitrogen topdressing timing on the spatial distribution of gluten proteins and on bread-making quality. The results should help to provide a novel view for improving quality of bread product by pearling grains into different fractions and by nitrogen fertilization.

2、Effects of Different Nitrogen Topdressing Ratios on Soil Nitrate

To evaluate the suitable topdressing ratio for maize nitrogen application, the effects of different nitrogen topdressing ratios on soil nitrogen and summer maize growth were studied in 2022–2023.

3、Effect of topdressing time on spring maize yield and nitrogen

Topdressing time is crucial to achieving a high yield.

Increasing Topdressing Ratio of Nitrogen Fertilizer Improves Grain

Increasing nitrogen (N) topdressing ratio may be an effective cultivation method to enhance wheat yield and N use efficiency (NUE) under global asymmetric warming due to the lower N demands of wheat at seedling stage.

Manure in combination with optimal topdressing with nitrogen fertiliser

Currently, low-cost food production using little or no fertiliser is common in oasis dry farming in Xinjiang. This approach results in excessively low crop yields and resource utilisation.

Effects of Different Spring Nitrogen Topdressing Modes on

The 1000-grain weight of the nitrogen topdressing remaining one-time at booting stage was higher than other treatments. T1 treatment could increase the spike number, grain number and yield.

Effects of Nitrogen Fertilizer Topdressing on Nitrogen Utilization

To alleviate the effects of field environment with low temperature and insufficient light on early-maturing corn in the flue-cured tobacco intercropping system. The experiment was conducted...

Optimizing rice in

These researches indicate the feasibility of using ASM to simulate the potential field reactive N losses. As such, the damage costs of N fertilization could be incorporated into in-season N recommendation algorithms to optimize the N management strategy.

Effects of Different Nitrogen Topdressing Ratios on Soil Nitrate

To evaluate the suitable topdressing ratio for maize nitrogen application, the effects of different nitrogen topdressing ratios on soil nitrogen and summer maize growth were studied in...

Effect of topdressing time on spring maize yield and nitrogen

Topdressing time is crucial to achieving a high yield. To determine the optimum topdressing time for spring maize in the black soil of northeast China in the “one base and one topdressing” mode, the effects of topdressing time of nitrogen (N) ...

Topdressing nitrogen fertilizer is an agricultural management practice aimed at supplementing plants with essential nitrogen to promote growth and development. Nitrogen is a critical element for plant growth, playing a vital role in protein synthesis, chlorophyll production, cell division, and elongation. when deciding between low-temperature or high-temperature topdressing, multiple factors must be considered, including crop type, soil conditions, climate, and fertilizer type. Below are key considerations and recommendations:

1. Crop Type: Different crops have varying nitrogen requirements. For example, corn and soybeans demand higher nitrogen levels to support rapid growth, while tomatoes and peppers may require lower nitrogen to maintain fruit quality and yield. Selecting the appropriate crop type is critical for determining whether and how to apply topdressing.

2. Soil Conditions: Soil pH, texture, structure, and organic matter content influence nitrogen availability and crop needs. Acidic soils, for instance, may fix nitrogen more strongly, necessitating alkaline fertilizers to improve usability. Additionally, microbial activity in the soil affects nitrogen transformation and release, making soil analysis essential for choosing suitable topdressing methods.

3. Climate Conditions: Temperature and humidity significantly impact plant growth. In hot summers, high temperatures can accelerate water evaporation, reducing nitrogen uptake efficiency. Using nitrogen fertilizers diluted with cooler water may be preferable in such cases. Conversely, during cold winters, low temperatures slow plant growth, potentially requiring increased nitrogen supply to stimulate development.

4. Fertilizer Type: Different nitrogen fertilizers (e.g., urea, potassium nitrate, ammonia) have distinct chemical properties and application methods. Urea, a common choice, requires attention to its volatility and soil pH effects. Potassium nitrate, a compound fertilizer containing nitrogen, phosphorus, and potassium, allows flexible nutrient balancing based on crop needs.

5. Timing of Fertilization: The optimal timing for topdressing coincides with the plant’s active growth phase, when nitrogen demand is highest. Missing this window may lead to ineffective results even with high-concentration fertilizers. Understanding crop growth cycles and nutrient requirements is crucial.

6. Fertilization Rate: The amount of nitrogen applied depends on crop type, soil conditions, climate, and fertilizer properties. Excessive nitrogen leads to waste and environmental pollution, while insufficient amounts risk undernutrition. Rational dosage is key to healthy crop growth.

7. Application Method: Topdressing methods impact nitrogen absorption. Common approaches include:

   • Base fertilizer topdressing: Suitable for long-term nutrient release.
   • Root-zone topdressing: Provides quick nitrogen supplementation.
   • Foliar topdressing: Enhances leaf growth and photosynthesis efficiency.

8. Environmental Factors: Atmospheric pollutants (e.g., sulfur dioxide, nitrogen oxides) can reduce nitrogen uptake, while soil contaminants (e.g., lead, mercury) may inhibit absorption. Pests and diseases also disrupt normal growth and nitrogen utilization.

decisions about low-temperature versus high-temperature nitrogen topdressing should integrate crop type, soil conditions, climate, fertilizer type, timing, rate, application method, and environmental factors. Scientific management and rational fertilization strategies maximize nitrogen use efficiency, fostering healthy crop growth and higher yields.