1、Optimal nitrogen management to achieve high wheat grain yield, grain

Furthermore, adopting common N fertilization practices alongside irrigation and implementing pre-anthesis N addition in medium soil texture and humid climate conditions also contributed to achieving optimal wheat performance.

2、Optimizing Nitrogen and Phosphorus Fertilizer Application for Wheat

The optimal fertilization strategy for wheat production on alkali soils was found to be 180 kg/ha of nitrogen and 80 kg/ha of phosphorus. These findings provide a theoretical foundation for optimizing fertilizer management in wheat cultivation on alkali soils.

3、Optimizing nitrogen fertilizer amount for best performance and highest

In this study, a two-year field experiment was conducted on winter wheat at three locations to determine the effects of the use of varieties and N application rates on wheat growth, grain yield, grain N accumulation, and net return.

4、Optimized split nitrogen fertilizer increase photosynthesis, grain

It can be concluded that SI along with a 5:5 basal-top-dressing nitrogen ratio should be considered as an optimal fertigation strategy for both high grain yield and efficiency in winter wheat.

5、Best Fertilizer for Wheat: Top Choices for High Yields

Here are some tips for the best application timing and methods to boost wheat yields. For nitrogen, apply some at planting and more in early spring after greenup.

Global evaluation of key factors influencing nitrogen fertilization

Finally, an advanced N management approach such as “ root zone targeted fertilization ” is suggested to reduce fertilizer application rate and save time and labor costs while achieving high yield and NUE.

Chapter 11: Nitrogen Management for Wheat Production

Precision N management is necessary, therefore, to increase wheat production eficiency. Nitrogen rate recommendations for South Dakota wheat are based on yield goals, soil testing N levels, and cropping systems.

Optimizing nitrogen fertilizer inputs and plant populations for greener

Appropriate nitrogen fertilizer inputs significantly enhanced nitrogen use efficiency and maintained grain yield on HY plots. Grain yield and nitrogen partial factor productivity gradually increased with year of cultivar release (1995–2019) (P < 0.05).

Nitrogen Management for Winter Wheat: Principles and Recommendations

Efficient nitrogen (N) fertilization is crucial for economic wheat production and protection of ground and surface waters. Excessive plant-available N produces wheat plants that are susceptible to lodging and disease with resulting decreased yields and increased input costs.

Effect of Nitrogen Fertilizer Application Methods on Wheat Yield and

The results revealed that N fertilizer application in four split doses at sowing, tiller formation, stem elongation and grain filling stages not only enhanced grain yield but also improved grain...

Nitrogen fertilization is a critical step in wheat cultivation, playing a vital role in promoting growth, yield, and quality. Below are the optimal practices for applying nitrogen fertilizer to wheat:

I. Selecting the Appropriate Nitrogen Source

1. Urea

• Description: A widely used nitrogen fertilizer with high nitrogen content, easily absorbed by wheat, suitable for all soil types.
• Caution: Avoid overapplication to prevent seedling burn.

2. Ammonium Bicarbonate

• Description: Contains high nitrogen but releases slowly, ideal for topdressing.
• Caution: Mixing with alkaline fertilizers may reduce efficacy.

3. Ammonium Chloride

• Description: A fast-acting nitrogen source prone to volatilization; requires deep placement or use of slow-release agents.
• Caution: Prevent nitrogen loss due to excessive moisture.

4. Ammonia Solution

• Description: High in nitrogen but irritating to smell; may induce crop diseases.
• Caution: Use cautiously to avoid phytotoxicity; consider crop tolerance.

II. Timing of Application

1. Base Fertilization

• Method: Apply to the soil before sowing to establish foundational nitrogen supply.
• Recommendation: Apply approximately one month before sowing to enhance root absorption.

2. Topdressing

• Method: Supplement nitrogen during wheat growth to meet peak demand.
• Key Stages: Divide into two critical periods—jointing and heading stages—based on crop development and soil conditions.

III. Fertilization Methods

1. Ditch Application

• Method: Spread fertilizer evenly in furrows, then cover with soil.
• Advantages: Simple and mechanizable; avoid direct contact with roots.

2. Hole Application

• Method: Dig holes between rows or plants, place fertilizer, and cover.
• Advantages: Targeted nutrient delivery; requires skilled application.

3. Foliar Spraying

• Method: Spray nitrogen solution directly onto leaves using equipment.
• Advantages: High nitrogen uptake efficiency; reduced environmental impact.
• Disadvantages: Costly and technically demanding.

4. Irrigation-Based Fertilization (Drip/Sprinkler)

• Method: Dissolve fertilizer in water and deliver via drip or sprinkler systems.
• Advantages: Precision application; water-saving.
• Disadvantages: High initial equipment costs.

IV. Key Considerations

1. Soil Conditions

• Match nitrogen sources to soil types (e.g., slow-release fertilizers for sandy soils).
• Avoid combining acidic/alkaline nitrogen fertilizers with contrasting soil pH.

2. Climate

• Drought/Heat: Reduce nitrogen to minimize evaporation and leaf scorch.
• Rainy/Cool Seasons: Increase nitrogen to support growth.

3. Crop Characteristics

• Adjust nitrogen rates and methods according to growth stages.
• Nitrogen-Loving Crops (e.g., legumes): Increase nitrogen during flowering/podding.
• Drought-Tolerant Crops: Reduce nitrogen use.

4. Environmental Impact

• Minimize pollution by optimizing timing/placement (e.g., avoid runoff near water bodies).
• Complement chemical fertilizers with organic options to reduce ecological burden.

Nitrogen fertilization is essential for healthy wheat production. By selecting the right nitrogen source, timing, and application method, while adhering to environmental and crop-specific guidelines, farmers can maximize yields and quality sustainably.