1、Nitrogen Fertilization Causes Changes in Agricultural Characteristics

Rice is a source of food for the majority of the global population. Currently, the rice yield is declining owing to extreme climate change. Farmers use nitrogen fertilizers to increase the yield; however, excessive nitrogen fertilizer application has a negative impact on plants and the environment.

2、Improving nitrogen fertilization in rice by sitespecific N management

Excessive nitrogen (N) application to rice (Oryza sativa L.) crop in China causes environmental pollution, increases the cost of rice farming, reduces grain yield and contributes to global warming.

3、Excessive nitrogen in field

A three-year field experiment was conducted to reveal the mechanisms by which excessive nitrogen application regulated grain filling. We found that excessive application of nitrogen reduced the starch biosynthesis and grain weight of inferior spikelets but not superior spikelets.

The Influence of Nitrogen Fertilizers on Endophytes in Rice Grains and

This study investigated how nitrogen (N) fertilization influences rice grain quality and seed endophytic microbial communities, a topic of growing importance because of the critical role of N management in balancing crop productivity and nutritional attributes.

Frontiers

The growing environmental pollution from excessive fertilization has led to numerous field studies on N losses from farmland (Cao et al., 2014; Lan et al., 2020; Shi et al., 2020), providing valuable data for a comprehensive assessment of N losses and their influencing factors in this region.

(PDF) Improving Nitrogen Fertilization in Rice by Site

Excessive nitrogen (N) application to rice (Oryza sativa L.) crop in China causes environmental pollution, increases the cost of rice farming, reduces grain yield and contributes to global...

Global meta

Almost half of global nitrogen (N) fertilizer is applied to rice, wheat and maize, but a large proportion is not directly taken up causing detrimental effects on the environment.

Excessive Nitrogen Fertilization Favors the Colonization, Survival, and

The results suggested that nitrogen fertilizer triggers bottom-up effects on rice and increases S. furcifera populations. The present study provides an insight into how excess nitrogen fertilization shapes rice–planthopper interactions and the consequent positive effect on S. furcifera infestation.

Excessive Nitrogen Application Leads to Lower Rice Yield and Grain

Nitrogen fertilizer is an important agronomic measure to regulate rice yield and grain quality. Grain filling is crucial for the formation of rice yield and grain quality. However, there are few studies on the effects of excessive nitrogen application (ENA) on grain filling rate and grain quality.

Nitrogen Fertilization Causes Changes in Agricultural Characteristics

Farmers use nitrogen fertilizers to increase the yield; however, excessive nitrogen fertilizer application has a negative impact on plants and the environment. Nitrogen fertilizer is...

Causes and Solutions for Excessive Nitrogen Fertilization in Rice

I. Causes of Excessive Nitrogen Fertilization

1. Overapplication: Farmers often apply excessive nitrogen fertilizer to rice fields in pursuit of higher yields. This leads to rapid, unbalanced growth, weak stems, yellowing leaves, and even lodging (collapse of plants).

2. Uneven Fertilization: Fertilizer is frequently applied only to the surface soil, neglecting deeper layers. This results in uneven nitrogen absorption, causing some parts of the rice to grow excessively fast while others lag behind.

3. Improper Timing: Fertilization during the tillering stage (when rice grows fastest and demands the most nitrogen) is critical. applying fertilizer too early or too late can disrupt growth patterns and exacerbate nitrogen excess.

4. Soil Conditions: Factors such as soil pH, texture, and structure influence nitrogen efficacy. Unsuitable soil conditions (e.g., high acidity or poor structure) can hinder nutrient uptake, leading to suboptimal rice growth even with adequate fertilization.

II. Solutions

1. Rational Fertilization: Adjust nitrogen usage based on soil fertility and rice growth stages. For example, limit nitrogen application to no more than 5 kilograms per mu (a traditional Chinese unit). Use techniques like deep application and stratified fertilization to ensure even distribution.

2. Optimal Timing: Apply nitrogen during the tillering stage, when rice demand is highest. Avoid premature or delayed fertilization to prevent overgrowth.

3. Improve Soil Conditions: Amend soil before planting to enhance fertility and structure. Avoid growing rice in areas with excessive soil acidity or loose, unstable soil.

4. Scientific Field Management: Strengthen crop monitoring by removing diseased plants, weeding, and reducing pesticide use. These practices minimize nitrogen waste and lower environmental risks.

5. Use Slow/Controlled-Release Fertilizers: Opt for slow- or controlled-release nitrogen fertilizers, which release nutrients gradually. This matches rice’s needs at different growth stages, reduces leaching, and improves efficiency.

farmers should prioritize rational nitrogen use, avoid overapplication, and adopt scientific management practices to promote healthy rice growth.

Key Terminology:

• Lodging: Plant collapse due to weak stems.
• Tillering stage: Key phase for rice branching and nitrogen demand.
• Mu: Traditional Chinese land area unit (≈0.067 hectares).
• Stratified fertilization: Applying fertilizer in multiple soil layers.