1、Improving nitrogen use efficiency of rice crop through an optimized

Avoiding excessive N use without compromising yields has long been a priority for both research and government policy in China. The sustainable development of rice production is seriously restricted by the massive N input and low N use efficiency (NUE).

2、Localized nitrogen management strategies can halve fertilizer use in

Using a localized nitrogen management model for wheat, maize and rice, this study estimates the environmental and economic benefits of improving nitrogen use efficiency at the county level.

3、Nitrogen Fertiliser Reduction at Different Rice Growth Stages and

Rice yield and quality decline due to excessive fertiliser use is problematic in China. To increase rice grain filling and improve rice yield and quality, a nitrogen reduction and density increase study in 2023 and 2024 was imposed on a long-term experimental field.

Improving nitrogen fertilization in rice by sitespecific N management

Scientists from the International Rice Research Institute have collaborated with partners in China to improve rice N fertilization through site-specific N management (SSNM) in China since 1997.

Optimizing nitrogen fertilizer application protocol to minimize the

Results: Optimizing the N fertilizer application protocol (N 54-72-54) for direct-seeded rice produced significantly higher yield by 13.3%, N accumulation by 33.4%, and N recovery efficiency by 50.7% compared to excessive basal N (N 180-0-0).

Optimizing nitrogen fertilizer application in Chinese rice production

Optimizing the nitrogen (N) fertilizer use is the key to facilitating the sustainable development of agricultural systems. In this study, a DeNitrification–DeComposition model was used to analyze the effects of N fertilization on yield, profit, and reactive N losses in single-season rice production of China.

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Increasing nitrogen use efficiency (NUE) in agricultural production mitigates climate change, limits water pollution and reduces fertilizer subsidy costs. Nevertheless, strategies for...

Optimizing nitrogen fertilizer application protocol to minimize the

Direct-seeded rice is popular for saving labor, simplifying cultivation, and reducing costs, but it involves new challenges of shallow root systems and short growth periods that require optimizing the time, frequency and proportion of nitrogen (N) fertilizer application.

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.

Irrigation and fertilization management to optimize rice yield, water

Increasing water scarcity and environmental contamination with excess chemical nitrogen fertilizer use necessitate the development of water-nitrogen conservation technology in rice production.

Excessive nitrogen fertilizer application in rice can lead to overly vigorous growth, resulting in tall and spindly plants, thin and wide leaves, weak stems, reduced tillering, fewer effective panicles, lower seed-setting rates, and ultimately decreased yields. Additionally, overapplication of nitrogen fertilizers can cause soil acidification and compaction, impairing soil aeration and water-retaining capacity. properly managing nitrogen fertilizer use in rice is critically important.

Below are methods to control nitrogen fertilizer application in rice:

1. Rational Fertilization: Design a fertilization plan based on rice growth stages and soil fertility. Generally, rice requires more nitrogen during the early growth stage (tillering stage) to support tillering, while less nitrogen is needed during the booting and heading stages to avoid excessive vegetative growth.

2. Combine Organic and Chemical Fertilizers: Organic fertilizers provide essential nutrients, while chemical fertilizers supplement deficiencies. Balancing both ensures optimal nutrient uptake.

3. Deep Ditch Drainage: Excess water in paddy fields accelerates nitrogen loss. Regularly maintain deep drainage ditches to improve field ventilation and reduce runoff.

4. Crop Rotation: Rotating crops reduces nitrogen depletion and enhances soil fertility. Plant leguminous crops or green manure before rice cultivation to enrich soil organic matter.

5. Scientific Fertilization: Tailor nitrogen types and dosages to specific rice varieties and soil conditions. Rice generally requires moderate nitrogen; excessive amounts hinder growth.

6. Monitor Soil Fertility: Regularly test soil nitrogen levels to track changes and inform rational fertilization practices.

7. Optimize Irrigation: Excessive water hampers nitrogen absorption. Schedule irrigation timely and avoid waterlogging to maximize efficiency.

8. Pest and Disease Control: Over-fertilization with nitrogen increases pest/disease risks. Integrate fertilization with robust pest management strategies.

9. Timely Harvesting: Harvesting at optimal times boosts yield and quality while minimizing nitrogen loss. Leave rice stubble to replenish soil organic matter.

10. Agricultural Extension: Strengthen farmer education on proper fertilization techniques to promote sustainable practices.

controlling nitrogen fertilizer use in rice requires a holistic approach, considering factors such as timing, dosage, organic-inorganic balance, drainage, crop rotation, soil testing, irrigation, pest management, harvest timing, and agricultural training. Implementing these measures effectively reduces nitrogen waste, enhances rice productivity, and improves grain quality.