1、Effects of nitrogen supply on tomato yield, water use efficiency and

In this meta-analysis, it was found that nitrogen application was positively correlated to tomato yield, and low, optimal and high nitrogen supply increased tomato yield by 40.4%, 59.9%, 63.3% relative to no nitrogen supply, respectively.

2、Optimizing Nitrogen for Sustainable Yield and Efficiency

Therefore, optimizing nitrogen fertilizer application for a sustainable yield in facility-based tomato growing, while improving nitrogen-use efficiency and minimizing environmental impact, is crucial for the sustainable development of facility-based vegetable production systems.

3、Optimizing N Fertilization to Improve Yield, Technological and

Processing tomato is an important herbaceous crop that requires remarkable agronomic inputs (like fertilizers and irrigation water), which should be appropriately managed, especially in high-fertility conditions, in order to make the tomato production sustainable.

4、(PDF) Optimizing Nitrogen for Sustainable Yield and Efficiency

Results revealed that the high yield and good fruit quality of tomato plants at high temperatures can be maintained by higher photosynthesis, nitrogen efficiency, and nutrients with...

Nitrogen management in processing tomato: An overview

Nitrogen availability is paramount in achieving optimal crop growth, high yield, and good quality of processing tomato. The excessive use of N fertilizers, combined with low fertilizer N recovery by the crop, may lead to environmental risks related to high nitrate leaching.

Tomato yield, and water use efficiency as affected by nitrogen rate and

Tomato yield can be increased by the application of optimum water and fertilizer. A field experiment was conducted in Efratana Gidim district, North Shewa, Amhara, Ethiopia, during 2019 and...

Effects of optimal nitrogen fertilization on N balance and nitrate

Here, we proposed three N application modes and studied their effects on tomato yield, soil N residue, and N balance. The results will provide a scientific basis for efficient tomato production and optimized N fertilization. Methods The experiment was carried out in a vegetable greenhouse in Huimin, Shandong Province.

Role of Nitrogen in Tomato Production

Nitrogen is a key component of enzymes, vitamins, chlorophyll and other cell constituents, all of which are essential for crop growth and development. It is thus one of the most important nutrients required for high tomato crop yields.

Optimization of Irrigation and Nitrogen Fertilization Improves Biomass

Enhancing water and fertilizer use efficiencies is pivotal for sustainable tomato production. Adequate nitrogen and water management strategies have shown promise in improving the soil environment and crop productivity.

Yield, Quality, and Nitrogen Leaching of Open

In this study, it was hypothesized that optimal fertilization (controlled-release nitrogen) could reduce the risk of nitrogen leaching without reducing tomato yield and quality under different nitrogen application practices.

Tomatoes, as an important vegetable crop, rely on multiple factors for high yield, with nitrogen fertilization being a critical consideration. Why is nitrogen fertilizer necessary for tomatoes? How does it impact their productivity? The following analysis provides detailed insights:

1. The Critical Role of Nitrogen Fertilizer in Tomato Growth

1. Promoting Plant Growth Nitrogen fertilizer supplies essential nitrogen for plant growth, particularly for protein synthesis, which is vital for development. Proper nitrogen application strengthens tomato plants, enhancing their structure and health.

2. Enhancing Photosynthesis Efficiency Nitrogen increases chlorophyll content, boosting photosynthetic rates. This process, where plants convert CO₂ and water into organic matter using light energy, forms the foundation of growth. Higher chlorophyll levels improve photosynthetic efficiency, supporting greater productivity.

3. Facilitating Fruit Development Nitrogen is crucial for fruit formation. Adequate nitrogen promotes fruit expansion, improving both quality and yield.

4. Improving Stress Resistance Nitrogen strengthens root activity, enabling plants to better withstand stressors like drought or cold. This is especially important for temperature-sensitive crops like tomatoes, which thrive in warm, humid conditions but are prone to diseases.

2. Nitrogen Requirements for High-Yield Tomatoes

1. High Nitrogen Demand Tomatoes require significant nitrogen. Approximately 1–2 kg of nitrogen fertilizer is needed to produce 1,000 kg of dry matter under normal conditions, with higher demands for high yields. Farmers must ensure sufficient nitrogen to meet these targets.

2. Application Methods Both base fertilizer (applied pre-planting for sustained nitrogen release) and topdressing (timed applications based on growth stages) are effective. Foliar spraying can also directly supply nitrogen to plants.

3. Selecting Nitrogen Sources Choose appropriate nitrogen products (e.g., urea, ammonium nitrate, ammonium phosphate) based on crop needs and soil conditions. Different formulations suit specific growth phases and soil types.

3. Risks of Excessive Nitrogen Use

1. Nutrient Imbalance Over-application leads to excessive soil nitrogen, disrupting nutrient uptake balance and hindering normal growth.

2. Disease Proliferation Excess nitrogen fuels pathogen growth, increasing risks of diseases like root rot and late blight.

3. Quality Degradation Over-fertilization can reduce fruit color, taste, and nutritional value, lowering market appeal.

4. Best Practices for Nitrogen Application

1. "Small Doses, Frequent Applications" Apply nitrogen in divided, smaller doses to prevent soil oversaturation and optimize plant absorption.

2. Soil-Test Calibrated Dosage Adjust nitrogen levels based on soil fertility and crop requirements. Increase for nutrient-poor soils; reduce for肥沃 soils or low-nitrogen-demand crops.

3. Integrated Fertilization Combine nitrogen with phosphorus, potassium, and organic fertilizers to enhance nutrient synergy and yield.

While nitrogen fertilizer is indispensable for tomato high yields, its use must be scientifically managed. Farmers should tailor nitrogen application rates, timing, and methods to soil and crop needs while ensuring balanced nutrition. By doing so, tomatoes can achieve stable, healthy growth and maximized productivity.