1、Using APSIM to optimize corn nitrogen fertilizer application levels in

Therefore, N fertilizer application levels should be optimized for corn under long-term alfalfa-corn (AC) rotation system to achieve high yield and N use efficiency.

2、Improving Nitrogen Use Efficiency for Corn (Zea mays L.) Production

Opportunities abound for improving NUE through implementation of fundamental BMPs, including selection of genetics with high NUE, development of enhanced-efficiency fertilizer products (CRF...

3、Effects of Nitrogen Application Strategies on Yield, Nitrogen

Hence, optimizing the N fertilizer application strategy is crucial for crop production. In this study, a field plot trial with five N fertilization application strategies was conducted in the maize field from 2021 to 2022 in the Ningxia Yellow Irrigation District, Northwest China.

4、Nitrogen Management for Corn Production

Nitrogen Use and Water Quality Increasing N rates in reaction to high corn yields will reduce profitability and worsen environmental issues like nitrous oxide emission and nitrate-N in water systems

Nitrogen Management for Corn

itrogen cycle. Nitrogen Rate A bushel of corn contains about 0.6 pounds of nitrogen, so a 200-bushel corn crop harvested as grain removes ab. ut 120 pounds of N per acre. About two-thirds of the N in a corn plant ends up in the grain, so a 200-bushel crop would have about 180 pounds of N in the plants .

Optimizing nitrogen fertilizer use for more grain and less pollution

Optimal nitrogen (N) management is critical for efficient crop production and agricultural pollution control. Approximate 210–220 kg ha −1 N fertilizer was applied in millions of small plots through broadcasting way in China, resulting in over and loss of N fertilizers.

Enhancing yield of grain corn through nitrogen management approaches

Corn was grown at Stephenville, TX, on Windthorst fine sandy loam (fine, mixed, thermic Udic Paleustalf) soil during 1987, 1988, and 1989 to determine optimum fertilizer N rate and plant density ...

Corn optimum nitrogen fertilizer rate and application timing when

Efficient N fertilizer use can help reduce corn yield loss following a rye cover crop. Farmers and researchers continue to question the impact of rye (Secale cereale L.) cover crops (RCC) on the optimal N fertilizer rate and grain yield of corn (Zea mays L.).

Evaluation of optimal nitrogen rate for corn production under mulched

Optimal N rate should be established to ensure high yields and minimize the input and the loss of N fertilizer. Therefore, N uptake (NU) and soil NO 3–N residual distribution must be monitored during the crop growing season to achieve efficient N fertilizer management in farmlands.

Nitrogen fertilizer and pronitridine rates for corn production in the

Reducing nitrogen (N) losses can be accomplished by applying recommended N rates and using nitrification inhibitors (NI). In some agricultural systems, managing N application rate or using a NI could improve N use efficiency and increase crop yields.

Corn is one of the most widely cultivated food crops globally, and its nitrogen (N) fertilizer requirements directly impact yield and quality. Rational N management is crucial for achieving high and stable yields. This article explores the optimal N fertilizer dosage for corn throughout its entire production cycle.

I. Growth Stages and Nitrogen Requirements

1. Seed Germination Stage: During germination, corn roots begin absorbing soil moisture and nutrients. Nitrogen demand is minimal at this stage. Excessive N promotes rapid shoot growth but weakens root development, harming future growth and yield. N application should be minimized here.

2. Seedling Stage: As the plant grows, N demand increases. Seedlings require substantial nitrogen to support leaf expansion and photosynthesis, enhancing dry matter accumulation. Proper N levels promote sturdy stems and lush leaves, laying a foundation for high yields.

3. Jointing and Tasseling Stage: Nitrogen demand peaks during jointing and tasseling. Adequate N is critical for ear development, pollination, and grain formation. Insufficient N leads to poor ear development and reduced yields. N application should be increased during this period.

4. Tassel Emergence and Silking Stage: Nitrogen requirements remain high during tassel emergence and silking. Sufficient N ensures healthy ear development and pollen maturation. Deficiencies cause poor grain set and lower yields. N dosage should be adjusted upward to support reproductive processes.

5. Grain Filling and Maturation Stage: Nitrogen demand declines during grain filling. Excessive N at this stage reduces grain quality and wastes resources. Applications should be scaled back to ensure proper maturation.

6. Post-Harvest: Nitrogen needs drop to near zero after harvest, as the plant is no longer metabolically active. Fertilization should cease to avoid environmental pollution and resource waste.

II. Recommended Nitrogen Fertilizer Dosages

Based on the analysis, follow a "light, frequent applications" principle:

• Germination: 0.5–1 kg/mu (0.5–1 kg per mu, a traditional Chinese unit).
• Seedling: 1–2 kg/mu.
• Jointing and Tasseling: 2–3 kg/mu.
• Tassel Emergence and Silking: 3–4 kg/mu.
• Grain Filling: 1–2 kg/mu.
• Post-Harvest: Cease N application.

III. Key Considerations

1. Timing: Apply N in early morning or evening to minimize volatilization and runoff, improving efficiency.
2. Method: Use deep placement or hole application to reduce soil disturbance and acidification risks.
3. Balanced Nutrients: Combine N with phosphorus (P) and potassium (K) to meet corn’s nutritional needs.
4. Monitoring: Regularly assess growth, yield, and grain quality to adjust fertilization strategies.
5. Sustainability: Prioritize eco-friendly practices. Reduce synthetic fertilizers, recycle organic matter, and protect soil health.

The optimal N range for corn over one production cycle is 0.5–4 kg/mu, balancing crop needs with environmental protection. Attention to application methods, nutrient balance, and monitoring ensures maximum efficacy while minimizing ecological harm.