1、Estimation of nitrogen fertilizer requirement for rice crop using

Estimating in-season nitrogen requirement is essential for crop nitrogen management. Critical nitrogen dilution curve is an effective and simple tool for assessment of in-season crop nitrogen requirement. Crop growth stages can play an essential role in quantifying in-season nitrogen requirement.

2、Estimating thresholds of nitrogen, phosphorus and potassium fertilizer

In this study, we proposed a method that utilizes allowed ranges of partial nutrient balance and yield to estimate the threshold of nitrogen (N), phosphorus (P), and potassium (K) fertilizer applied to rice (Oryza sativa L.) fields in China.

3、Optimizing Nitrogen Fertilizer Rate and Investigating Mechanism Driving

Abstract Investigating the factors influencing rice grain yield (GY) is critical for optimizing nitrogen (N) management and enhancing resource use efficiency in rice cultivation.

Nitrogen fertilization application strategies improve yield of the rice

The results showed that N fertilization strategies could improve the nitrogen use efficiency and yield of rice, but the response of different rice varieties to N fertilizer strategies...

Improving Nitrogen Use Efficiency in Rice for Sustainable Agriculture

For sustainable agriculture, improving the nitrogen use efficiency (NUE) to decrease N fertilizer input is imperative. In the present review, we firstly demonstrate the role of N in mediating root architecture, photosynthesis, metabolic balance, and yield components in rice.

Improving nitrogen fertilization in rice by sitespecific N management

On average, SSNM reduced N fertilizer by 32% and increased grain yield by 5% compared with farmers’ N practices. The yield increase was associated with the reduction in insect and disease damage and improved lodging resistance of rice crop under the optimal N inputs.

Improving nitrogen use efficiency of rice crop through an optimized

We hypothesized that NUE could be improved by optimizing the root system.

Nitrogen Use Efficiency in Rice: Implications for Sustainable Farming

Eficient nitrogen use in rice cultivation is critical for improving yields and minimizing environmental impacts. This study examines the nitrogen use eficiency (NUE) of diferent rice varieties under varied nitrogen application rates.

Application and Management of Nitrogenous Fertilizer in Rice Field: A

Rice production can be increased by the application of nitrogenous fertilizer whether organic or inorganic at an appropriate time and place. The fertilizer should be applied in multiple...

Optimizing Nitrogen Fertilizer Management Enhances Rice Yield, Dry

Appropriate N fertilizer management (P3N2) improved the rice growth characteristics, dry matter accumulation, crop growth rate, dry matter transport rate, dry matter contribution rate, and NUE, thus promoting an increase in the rice yield and efficient use of nitrogen.

When growing rice, determining the appropriate amount of nitrogen fertilizer is a critical issue. Nitrogen fertilizer is essential for rice growth, as it promotes plant development and increases yields. excessive nitrogen application can lead to overly rapid rice growth, negatively impacting grain quality and productivity. controlling nitrogen fertilizer usage rationally is crucial. The following suggestions can help calculate the nitrogen requirements for rice:

1. Understand Soil Conditions: Before planting rice, assess the soil’s nutrient levels. If the soil already contains sufficient nutrients, reduce nitrogen fertilizer accordingly. Conversely, if soil nutrients are deficient, increase nitrogen application as needed.

2. Consider Climate: Climatic conditions significantly affect rice growth. In hot, humid climates, rice grows faster and requires more nitrogen. In cooler, drier conditions, growth slows, allowing for reduced nitrogen use.

3. Choose Nitrogen Sources Based on Rice Varieties: Different rice varieties have varying nitrogen needs. Early-maturing varieties typically demand more nitrogen, while late-maturing ones require less. Select nitrogen products tailored to the specific rice variety grown.

4. Monitor Plant Growth: During fertilization, regularly observe plant development. Excessive growth indicates over-fertilization with nitrogen, prompting a reduction. Sluggish growth suggests insufficient nitrogen, requiring an increase.

5. Optimize Timing and Methods: Fertilization timing and techniques impact nitrogen uptake. Applying fertilizer during the tillering and flowering stages is most effective. Deep or furrow application improves nitrogen absorption compared to surface spreading.

6. Combine with Other Fertilizers: Beyond nitrogen, balance phosphorus and potassium fertilizers based on rice needs. Phosphorus supports root development and disease resistance, while potassium regulates water balance and lodging resistance. Mixing fertilizer types enhances overall effectiveness.

7. Manage Irrigation After Fertilization: Post-fertilization, promptly drain excess water to prevent nitrogen loss. Avoid directly pouring chemicals into paddy fields to minimize water pollution.

8. Regularly Test Soil and Plant Nutrients: Use soil testers or plant tissue samples to monitor nutrient levels. Adjust fertilization strategies based on testing results to maintain optimal soil and plant health.

rational nitrogen management is vital for successful rice cultivation. By evaluating soil conditions, climate, rice varieties, growth patterns, and combining proper fertilization timing, methods, and supplementary nutrients, farmers can effectively improve both yield and grain quality.