1、(PDF) Positive and Negative Impact of Nitrogen Fertilizer on Soil

This study found that excessive nitrogen fertilization had negative impact on soil health factors such as bulk density increment and carbon content decline through deeper profiles.

2、Long

Accordingly, long-term nitrogen application could promote the release of residual N fertilizer from soil sequestration and benefit crop growth, resulting in more residual N fertilizer being absorbed by crops in the later season.

3、Excessive use of nitrogenous fertilizers: an unawareness causing

Farmers occasionally need to add nitrogen fertilizer to their farms and gardens to make available just the precise nutrients for their plants' growth. The applications of inorganic nitrogen fertilizers to various crops have been continuously increasing since last many decades globally.

Nitrogen Fertilization. A Review of the Risks Associated with the

Nearly half of N fertilizer input is not used by crops and is lost into the environment via emission of gases or by polluting water bodies. It is essential to achieve production levels, which enable global food security, without compromising environmental security.

Nitrogen Fertilization I: Impact on Crop, Soil, and Environment

Long-term application of ammonia-based N fertilizers, such as urea, has increased soil acidity which rendered to soil infertility where crops fail to respond with further application of N fertilizers.

Nitrogen Use in Agriculture : A Growing Threat to Health and the

Excessive nitrogen use has far-reaching consequences for both the environment and human health. Nitrogen pollution degrades air, water, and soil quality, contributes to biodiversity loss, and accelerates climate change.

The Effects of Nitrogen Fertilizer on Plant Growth

Nitrogen is an essential element for plant growth and development; however, due to environmental pollution, high nitrate concentrations accumulate in the edible parts of these leafy vegetables, particularly if excessive nitrogen fertilizer has been applied.

Excessive use of nitrogenous fertilizers: an unawareness causing

Abstract Farmers occasionally need to add nitrogen fertilizer to their farms and gardens to make available just the precise nutrients for their plants’ growth. The applications of inorganic nitrogen fertilizers to various crops have been continuously increasing since last many decades globally.

Reducing the Health Impacts of the Nitrogen Problem

As an essential nutrient to plant growth, nitrogen is a critical input to enhance agricultural productivity. However, excess nitrogen can leach into soil and water and contaminate drinking water sources with nitrate, a water-soluble chemical compound of nitrogen.

How Does the Use of Fertilizer Affect the Nitrogen Cycle?

Explore the impact of fertilizers on the nitrogen cycle, including effects on ecosystems and greenhouse gas emissions.

The harms of using nitrogen fertilizers during the growth period mainly include the following aspects:

1. Soil Acidification: The main component of nitrogen fertilizers is nitrogen, which, when decomposed by microorganisms in the soil, produces a large amount of ammonia. This ammonia reacts with calcium carbonate in the soil to form ammonium salts, leading to soil acidification. Soil acidification disrupts soil structure and function, affecting the normal growth of plants.

2. Reduced Soil Fertility: The use of nitrogen fertilizers reduces the organic matter content in the soil, thereby decreasing soil fertility. Declining soil fertility impacts plant growth and development and may even lead to plant death.

3. Impact on Plant Nutrient Absorption: Plants’ ability to absorb nitrogen depends on root uptake. If the soil becomes acidic, plant roots are damaged, hindering nitrogen absorption and affecting growth and development.

4. Weakened Plant Stress Resistance: Excessive nitrogen fertilizer use promotes rapid plant growth, reducing stress resistance. When plants face drought, pests, or diseases, their weakened resilience makes them more vulnerable to damage.

5. Environmental Pollution: Nitrogen fertilizer use releases large amounts of ammonia and nitrates, polluting the environment. Ammonia is toxic to human health, while nitrate accumulation in soil contaminates groundwater and water sources.

6. Resource Waste: Overusing nitrogen fertilizers leads to resource waste. High costs burden farmers, and excessive use exacerbates environmental issues like soil acidification and water eutrophication.

7. Crop Quality Degradation: Excessive nitrogen causes rapid crop growth, disrupting the balance of sugars, proteins, and other nutrients, reducing crop quality.

8. Reduced Agricultural Efficiency: Overreliance on nitrogen fertilizers lowers agricultural efficiency. Excess nitrogen increases pesticide use, raising costs and harming the environment and human health.

Measures to Mitigate Harm:

1. Rational Nitrogen Use: Apply nitrogen fertilizers based on soil fertility and crop needs, avoiding overuse.
2. Improve Soil Health: Enhance soil fertility by adding organic matter and improving structure.
3. Boost Plant Resilience: Select stress-resistant varieties and prune wisely to strengthen plant defenses.
4. Scientific Fertilization: Tailor nitrogen types and dosages to crop demands and soil conditions.
5. Environmental Protection: Use eco-friendly fertilizers to reduce pollution.
6. Water Conservation: Adopt water-saving irrigation to minimize nitrogen runoff.

nitrogen fertilizer use during the growth period poses significant risks, including soil acidification, reduced fertility, nutrient absorption issues, weakened stress resistance, pollution, resource waste, poor crop quality, and low efficiency. scientific and rational nitrogen management is essential to minimize environmental and health impacts.