1、Nitrogen fertilization and soil nitrogen cycling: Unraveling the links

In our study, we unveiled a potential correlation that synthesized multiple environmental factors, NFGs, and nitrogen transformation rates (Fig. 7), providing insights into how nitrogen fertilization shaped the intricate dynamics of soil nitrogen cycling.

2、Global evaluation of key factors influencing nitrogen fertilization

However, various factors affecting yield and N fertilizer efficiency in wheat crops on a global scale are not extensively studied, thus highlighting the need for a comprehensive meta-analysis.

3、Fertilizers and Fertilization Strategies Mitigating Soil Factors

The effectiveness of nitrogen present in the soil/plant system depends on the degree of correction of soil factors limiting plant growth and nitrogen uptake at critical stages of yield formation by the currently cultivated plant by other fertilizers, including lime.

4、Residual effect of nitrogen fertilizer and its influencing factors in

The fate of fertilizer nitrogen, the amount, distribution, utilization and influencing factors of nitrogen fertilizer residues were reviewed in this paper. Based on the current research progress, the future research highlight and the implications of related research on agricultural management practice were proposed.

The key role of nitrogen fertilizer in crop rotation: Impact factors

rotation systems, the methods and strategies for nitrogen fertilizer application may be influenced by the interactions between different crops and soil conditions, making it necessary to conduct an in-depth study of the role and influencing factors of nitrogen fertilizer in rotation systems.

Nitrogen Fertilizer Use Efficiency: Research Progress

This study reviews the research results of nitrogen fertilizer use efficiency in recent years at home and abroad, and analyzes the research history, current status and existing problems of nitrogen fertilizer use efficiency from the research methods and the influencing factors of nitrogen use efficiency.

The Influence of Nitrogen Fertilizers on Endophytes in Rice Grains and

By applying graded nitrogen fertilizer treatments (N0–N3), we systematically analyzed the regulatory effects of nitrogen application levels on grain amino acid composition, protein content, and taste value.

Effects and influencing factors of slow

We summarized the comprehensive effects of slow- and controlled-release urea on wheat yield and N₂O emissions, as well as the key influencing factors using Meta analysis.

Towards precise nitrogen fertilizer management for sustainable

Building on this historical trajectory, we propose a future direction for N fertilizer recommendation systems that prioritizes improved model accuracy, timely data availability, integration of applications, cost-effectiveness, and reduced learning curves.

Advances in Nitrogen Use Efficiency of 15N

We emphasize studies utilizing 15 N-enriched fertilizers. Unlike previous studies that addressed isolated aspects of nitrogen dynamics, this review integrates findings on nitrogen transformation pathways, recovery rates, and environmental losses.

Nitrogen granule fertilizer is a common agricultural input primarily used to supply nitrogen (N), a critical macronutrient for plant growth. Nitrogen plays a pivotal role in promoting plant development, enhancing chlorophyll content, and improving photosynthetic efficiency. The efficacy of nitrogen granules depends on various factors, including application rates, soil types, climatic conditions, and crop varieties.

Application Timing and Efficacy

1. Application Timing: The timing of nitrogen fertilization is crucial for optimal results. Generally, nitrogen should be applied at the start of the growing season—in spring or autumn—when plants enter a rapid growth phase. Spring application aligns with peak nitrogen demand as plants emerge, while autumn fertilization prepares crops for winter. Applying nitrogen during these periods ensures adequate nutrient availability to support growth.

2. Application Rates: Proper dosage is key to avoiding adverse effects. Excessive nitrogen can lead to excessive vegetative growth, weak stems, or disease susceptibility. Recommended rates vary by crop and soil but typically range from 50–100 kg of urea per hectare for most crops. Adjustments are essential to balance crop needs and environmental risks.

3. Soil Conditions: Soil type significantly impacts nitrogen retention. Sandy soils, for instance, may leach nitrogen rapidly due to poor water retention, while clay soils can restrict nitrogen availability despite high retention. Microbial activity in the soil also influences nitrogen uptake, highlighting the importance of tailoring fertilizer type and methods to specific soil profiles.

4. Climatic Conditions: Drought or excessive rainfall can reduce nitrogen efficacy. In arid regions, limited moisture may hinder plant absorption, while heavy rain in humid areas can dilute soil nitrogen. Adjusting application schedules based on local weather patterns is vital for maximizing results.

5. Crop Varieties: Different crops exhibit varying nitrogen demands. Legumes and certain vegetables, for example, require higher nitrogen levels compared to other species. Understanding a crop’s specific needs allows for precise fertilization, preventing over- or under-application.

6. Fertilization Methods: Improper application can cause localized overconcentration of nitrogen, inhibiting growth. Techniques like stratified application, furrow placement, or hole-drilling ensure even distribution and reduce risks of toxicity.

7. Soil Amendment: Pre-fertilization soil preparation enhances nitrogen uptake. Deep tillage improves root access to nutrients, while incorporating organic matter boosts microbial activity and overall soil health. These practices optimize nitrogen utilization by plants.

8. Topdressing Timing: Supplemental nitrogen applications (topdressing) during peak growth stages address evolving crop demands. topdressing requires careful planning to avoid waste or negative environmental impacts.

9. Monitoring and Adjustment: Regular soil and plant tissue testing helps refine fertilization strategies. Symptoms like stunted growth or yellowing leaves indicate potential nitrogen deficiencies, while excessive growth suggests overapplication. Data-driven adjustments ensure sustained efficacy.

The effectiveness of nitrogen granules depends on an integrated approach considering application timing, soil properties, climate, crop type, fertilization methods, soil amendments, topdressing schedules, and dynamic monitoring. By combining scientific principles with site-specific management, farmers can maximize nitrogen use efficiency, promote healthy plant growth, and minimize environmental risks.