1、Nitrogen pollution policy beyond the farm

Most policies dedicated to reducing agricultural nitrogen pollution focus on changing farmer behaviour. However, farm-level policies are challenging to implement and farmers are just one of...

2、The impact of nitrogen Fertilizer application on air Pollution

We have investigated the impact of nationwide nitrogen fertilizer on air pollution, processing data by attributing air pollution and nitrogen fertilizer use to the county-level administrative divisions.

3、Reforming China’s fertilizer policies: implications for nitrogen

Our model results indicate that enhancing soil N uptake efficiency and manure recycled to soil alongside fertilizer subsidy removal can largely reduce N fertilizer use and N losses and abate N pollution in the short and long term, while food security remains largely unaffected.

Final

These industry sector EHS guidelines are designed to be used together with the General EHS Guidelines document, which provides guidance to users on common EHS issues potentially applicable to all industry sectors. For complex projects, use of multiple industry-sector guidelines may be necessary.

IMPROVING NITROGEN SAFETY IN CHINA: NITROGEN FLOWS, POLLUTION AND CONTROL

Comprehensive summaries of historic N flows and their critical threats and sustainable management are urgently needed. This paper initially reviews the historical trends of N flows in China and identifies the critical threats of N loss.

Nitrogen Fertilization. A Review of the Risks Associated with the

In this paper, we review the status of the pollution from N fertilizers worldwide and make recommendations to address the situation.

Nitrogen fertilizers and the future of sustainable agriculture: a deep

Therefore, it is required to increase the nitrogen use efficiency of plants to improve crop production, save raw materials used to produce nitrogen fertilizers, and mitigate adverse effects on human health and the environment.

Agriculture Nutrient Management and Fertilizer

Fertilizers and soil amendments can be derived from raw materials, composts and other organic matter, and wastes, such as sewage sludge and certain industrial wastes. Overuse of fertilizers can result in contamination of surface water and groundwater.

Sustainable strategies to limit nitrogen loss in agriculture through

To mitigate these issues, this study recommends the adoption of knowledge-based N management strategies, such as precision N application, slow- and controlled-release fertilizers, nitrification inhibitors, and integrated nutrient management.

Nitrogen pollution and management in rice–wheat cropping system

Addressing these challenges requires sustainable N management strategies to enhance NUE while minimizing environmental harm. This review compiles research on N pollution, its effects—including groundwater contamination, eutrophication, and biodiversity loss—and effective management strategies.

Guidelines for Nitrogen Fertilizer Pollution Control

I. Introduction Nitrogen fertilizers are indispensable in agricultural production. excessive application can lead to water eutrophication, soil acidification, and other environmental issues, causing severe impacts on ecosystems and human health. establishing guidelines for nitrogen fertilizer pollution control to guide farmers in rational fertilization and reduce environmental contamination is a critical task for achieving sustainable agricultural development.

II. Definition and Classification of Nitrogen Fertilizers Nitrogen fertilizers refer to chemical fertilizers containing nitrogen elements, including urea, ammonium nitrate, ammonium chloride, and ammonium sulfate. Based on their origin, they can be categorized into chemical nitrogen fertilizers, organic fertilizers, and microbial fertilizers.

III. Harms of Nitrogen Fertilizer Pollution The environmental hazards of nitrogen fertilizer pollution mainly include:

1. Water Eutrophication: Excessive nitrogen application leads to algal blooms, depleting dissolved oxygen in water bodies, causing fish and aquatic organism deaths, and disrupting aquatic ecosystems.
2. Soil Acidification: Long-term heavy use of nitrogen fertilizers fixes nitrogen in soil, promoting ammonia volatilization, lowering soil pH, and hindering plant growth.
3. Air Pollution: Nitrogen oxides are emitted during nitrogen fertilizer combustion, polluting the atmosphere.
4. Groundwater Contamination: Nitrogen leaching reacts with soluble substances in groundwater, degrading water quality.
5. Food Safety Risks: Excessive nitrogen residues in crops pose health hazards to humans.

IV. Causes of Nitrogen Fertilizer Pollution Key factors contributing to nitrogen fertilizer pollution include:

1. Unreasonable Application: Farmers overuse nitrogen fertilizers to boost yields, exacerbating pollution.
2. Lack of Scientific Knowledge: Inadequate understanding of crop nutrient requirements leads to improper fertilization.
3. Weak Environmental Awareness: Insufficient recognition of pollution risks results in inadequate mitigation measures.
4. Technological Limitations: Outdated agricultural technologies hinder efficient and eco-friendly nitrogen fertilizer production and application.

V. Mitigation Measures for Nitrogen Fertilizer Pollution The following strategies can address nitrogen fertilizer pollution:

1. Promote Scientific Fertilization: Enhance farmer training to improve rational fertilization practices.
2. Optimize Fertilization Structure: Adjust nitrogen use based on crop needs and soil conditions, reducing unnecessary applications.
3. Advance Eco-Friendly Nitrogen Fertilizers: Develop low-emission, biodegradable nitrogen fertilizers to minimize environmental impact.
4. Strengthen Monitoring and Regulation: Establish monitoring systems and enforce regulations to prevent overuse.
5. Encourage Organic Fertilizers: Increase soil organic matter through organic fertilizers to reduce reliance on synthetic nitrogen.
6. Adopt Water-Saving Irrigation: Use drip or sprinkler irrigation to minimize nitrogen loss via runoff.
7. Implement Ecological Agriculture: Promote crop rotation, intercropping, and other practices to prevent nitrogen buildup.
8. Enhance Legal Frameworks: Improve laws and penalties for illegal nitrogen fertilizer use to protect ecosystems.

Addressing nitrogen fertilizer pollution requires coordinated efforts from governments, enterprises, and farmers. By adopting scientific fertilization, optimizing practices, innovating eco-friendly products, and strengthening governance, we can mitigate environmental and health risks while advancing sustainable agriculture.