1、Lower dose of controlled/slow release fertilizer with higher rice yield

Application of slow/controlled release fertilizer (SCRF) in paddies is an efficient strategy to ensure rice yield and to improve N utilization. Notably, the effects of SCRF often vary with the types and dosages of SCRF, rice variety, and soil properties.

2、Enhanced Agronomic Efficiency Using a New Controlled

The effects of a new polymeric-coated controlled-release fertilizer (CRF) were compared to those of other slow-release and traditional fertilizers in a microscale experiment, which was carried out in cuvettes under partly controlled ambient conditions, and a large-scale field experiment.

3、Application of slow

Abstract Slow-controlled release fertilizers are experiencing a popularity in rice cultivation due to their effectiveness in yield and quality with low environmental costs. However, the underlying mechanism by which these fertilizers regulate grain quality remains inadequately understood.

4、Blended controlled

The N-use ef ficiency (NUE) under the treatments of blended controlled-release nitrogen fertilizer (CRN) (red) and conventional N fertilizer (green) applied at 0, 60, 120, 180, and 240 kg N ha-1in 2019 and 2020 at Mingguang (A, B), Chaohu (C, D) and Guichi (E, F) field sites, respective.

5、(PDF) Slow and Controlled Release Nitrogen Fertilizers: Options for

The emergence of slow and controlled-release fertilizers provides a new option for more efficient fertilization of rice.

Long

Controlled-release urea treatments improved rice yield by 11.9% and 44.6% compared to treatments with urea and no N fertilizer, respectively. Random forest analysis indicated that enzyme activity was the main factor affecting rice yield.

Controlled

Compared to inorganic compound fertilizer, controlled-release fertilizer increased dry matter accumulation at the mature stage and yield by 5.02–6.95% and 3.29–6.21%, respectively.

Effect of controlled

Controlled-release fertilizers (CRFs) are known to improve grain yield and N-use efficiency (NUE) without intensive labor input in crop production.

Impact of controlled

Overuse of nitrogen (N) fertilizer has led to low N use efficiency (NUE) and high N loss in single rice cropping systems in southeast China. Application of controlled-release urea (CRU)...

Effects of different types of slow

Polymer-coated urea (PCU) showed a controlled-release mode and provided sustained release throughout the whole growth stages. Sulfur-coated urea (SCU) exhibited a slow-release mode, providing insufficient release at the middle and late stages.

Controlled-release fertilizer (CRF) for rice represents a modern agricultural technology that regulates nutrient release rates and duration in soil through specialized chemical or physical methods. This approach more effectively meets the nutritional demands of rice during its growth cycle. The following sections analyze the advantages, application effects, and potential challenges of CRF in rice farming.

I. Advantages Analysis

1. Enhanced Fertilizer Use Efficiency CRF adjusts nutrient release based on crop needs, preventing resource waste from excessive single-application fertilization. Its slow, sustained release reduces nutrient loss and improves utilization efficiency.

2. Improved Soil Structure CRF mitigates soil structure damage caused by rapid fertilization, avoiding issues like compaction. Long-term use maintains soil aeration and water-holding capacity, benefiting root development.

3. Promotes Healthy Plant Growth Stable and balanced nutrient supply strengthens rice’s stress resistance (e.g., drought, disease) by ensuring optimal absorption.

4. Reduces Environmental Pollution Traditional fertilizers often lead to water eutrophication due to rapid releases. CRF minimizes such environmental risks, protecting ecosystems.

5. Economic Benefits CRF lowers fertilizer costs while improving crop yield and quality, potentially increasing farmer income.

6. Convenient Management Clear labeling and user-friendly designs simplify scientific fertilization and management for farmers.

7. Adaptable to Crop Needs CRF formulations can be tailored to match nutrient demands at different growth stages, suiting various crops.

8. Supports Sustainable Agriculture CRF reduces reliance on synthetic fertilizers, aligning with sustainable farming practices.

II. Application Effects

1. Precise Fertilization CRF packaging typically includes dosage and timing guidelines, enabling farmers to avoid over- or under-application.

2. Time Savings The slow-release properties of CRF reduce the need for frequent top-dressing, streamlining labor.

3. Improved Crop Quality Stable nutrient supply enhances rice qualities, such as grain taste and nutritional value.

4. Disease and Pest Resistance Balanced nutrition boosts rice immunity, reducing pest and disease incidence.

5. Extended Growth Period Optimal nutrient delivery supports longer growth cycles, providing flexibility for field management and harvest planning.

III. Potential Challenges

1. Cost Barriers Higher production costs make CRF more expensive upfront, raising concerns about affordability for farmers.

2. Technical Expertise Required Effective use demands knowledge of application methods and local conditions, necessitating farmer training.

3. Environmental Variability CRF performance may vary across regions or soil types, requiring careful product selection.

4. Market Adoption Traditional fertilization habits pose challenges to CRF uptake, especially in regions resistant to technological shifts.

5. Policy and Subsidy Gaps Limited government support and financial incentives hinder widespread adoption of CRF.

controlled-release fertilizer offers significant environmental and economic benefits for rice farming. cost and adaptability remain key hurdles. With advancements in agricultural technology and improved policy frameworks, CRF is poised to play a larger role in sustainable agriculture.