1、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.

2、Data

Increasing nitrogen use efficiency (NUE) in agricultural production mitigates climate change, limits water pollution and reduces fertilizer subsidy costs. Nevertheless, strategies for...

3、Enhancing nitrogen use efficiency in agriculture by integrating

Enhancing nitrogen use efficiency (NUE) is essential for promoting sustainable crop production and mitigating the negative impacts of nitrogen loss, such as water pollution and greenhouse gas emissions.

Improving Fertilizer Use Efficiency—Methods and Strategies for the

The first chapter of the Special Issue comprises two papers that focus on factors limiting the uptake and use of nutrients from fertilizers by crops, as well as on the present strategies and prospects for improving fertilizer use efficiency [12].

Improving nitrogen use efficiency in crop production

The book considers developments in the use of inorganic nitrogen fertilisers and their effectiveness in optimising nitrogen use efficiency, as well as how more organic sources of nitrogen, such as livestock manure, can be optimised to achieve the same goal.

(PDF) Improving Fertilizer Use Efficiency—Methods and Strategies for

The fertilizer use efficiency (FUE) is a measure of the potential of an applied fertilizer to increase the productivity and utilization of the nutrients present in the soil/plant system.

Improving Nitrogen Fertilizer Efficiency: Pathway to Sustainable

This article explores how to improve nitrogen fertilizer use efficiency through best practices and technology, providing solutions for sustainable agricultural development and helping farmers achieve higher crop yields and soil health.

Sustainable strategies to limit nitrogen loss in agriculture through

Alongside ensuring an overall increase in nitrogen use efficiency (NUE), improving fertilizer nitrogen availability through international collaboration, policy, and advanced techniques can reduce food shortages and build resilience.

Nitrogen Use Efficiency in Cropping Systems: A Comprehensive Overview

The report explores solutions to enhance nitrogen use efficiency in crop and animal production and elaborates on the magnitude, sources, and pathways of nitrogen flows and losses and associated environmental impacts such as eutrophication, acidification, and biodiversity loss.

Improving nitrogen use efficiency by manipulating nitrate

Our study suggests that enhancing source-to-sink nitrate remobilization represents a new strategy for enhancing NUE and crop production. As an essential nutrient for plant growth and development,...

Nitrogen fertilizer is indispensable in agricultural production, playing a crucial role in enhancing crop yields and quality. due to irrational usage and management practices, nitrogen fertilizer use efficiency often remains low, leading to resource waste and environmental issues. improving nitrogen fertilizer use efficiency to achieve sustainable agricultural development has become a critical task in modern agriculture. The following measures detail how to enhance nitrogen fertilizer utilization:

I. Soil Management

1. Soil Testing: Conduct regular soil tests to analyze nutrient status, especially nitrogen content. This helps determine whether nitrogen supplementation is needed and the appropriate dosage.
2. Deep Plowing and Soil Loosening: Deep tillage increases soil oxygen supply, promotes root growth and respiration, and enhances nitrogen absorption by plants.
3. Organic Fertilizer Application: Using organic fertilizers (e.g., farmyard manure, animal manure) improves soil structure, increases organic matter content, and boosts water-and-nutrient retention capacity, reducing nitrogen loss.
4. Rational Crop Rotation: Crop rotation balances soil nutrient demands, prevents nutrient depletion or accumulation from monoculture, and improves overall soil nutrient use efficiency.
5. Optimal Irrigation: Scientific irrigation avoids excessive water competition, ensures timely moisture for root growth, and prevents nitrogen dilution.
6. Soil pH Adjustment: Tailor fertilization based on soil acidity/alkalinity to maintain optimal pH levels for efficient nitrogen uptake.

II. Planting Techniques

1. Optimal Plant Density: Adjust planting density according to crop type and soil fertility to avoid overcrowding, light competition, and nutrient stress.
2. Balanced Fertilization: Apply nitrogen fertilizers based on crop nutritional needs and soil tests to prevent overapplication, which can cause nitrogen leaching or soil salinization.
3. Foliar Spraying: Apply nitrogen directly to leaves via foliar spraying during critical growth stages to improve absorption efficiency.
4. Pest Control: Use pesticides rationally to minimize nutrient loss caused by pests and diseases.
5. Post-Harvest Management: Harvest crops properly to avoid soil exposure, reducing nitrogen volatilization and runoff.

III. Fertilization Practices

1. Base Fertilizer + Topdressing: Apply sufficient base fertilizer before planting to meet long-term nutrient needs, and topdress with nitrogen during rapid growth phases.
2. Split Fertilization: Apply nitrogen in stages according to crop growth cycles to avoid overconcentration and absorption inhibition.
3. Deep Placement: Bury nitrogen fertilizers deeply in soil to enable slow release and reduce volatilization.
4. Nutrient Balancing: Adjust nitrogen-to-other-nutrients ratios based on soil tests to ensure comprehensive nutrition.

IV. Environmental Factor Control

1. Climate Adaptation: Increase nitrogen dosage during droughts or heatwaves to offset water/nutrient losses from evaporation.
2. Water Management: In dry conditions, optimize nitrogen use to improve water use efficiency.
3. Pest Monitoring: Implement timely pest control to prevent nutrient losses.
4. Weather Planning: Avoid extreme weather (e.g., heavy rain, storms) when fertilizing to minimize nitrogen loss.

V. Agricultural Policies and Technological Support

1. Policy Promotion and Training: Strengthen farmer education on scientific fertilization through policy advocacy and training.
2. Research Advancement: Fund studies on nitrogen efficiency, conduct field trials, and disseminate innovative practices.
3. Technical Services: Establish agricultural extension systems to provide farmers with consulting, guidance, and troubleshooting.
4. Monitoring and Evaluation: Build monitoring systems to track nitrogen use efficiency and inform data-driven fertilization.

Improving nitrogen fertilizer use efficiency requires integrated efforts in soil management, planting techniques, fertilization practices, environmental control, and policy-techno support. By adopting these strategies, agricultural sustainability and environmental protection goals can be achieved simultaneously.