1、Scheduling of nitrogen fertilizer topdressing during panicle

The results provide information to achieve high-yield cultivation of rice cultivars with a long growth duration.

2、Crop management based on multi

Therefore, several alternative approaches exist for achieving high-yielding irrigated rice, either using super high-yielding management (SHY) with higher fertilizer inputs, or adapting an optimal crop management such as MST with lower N but more splits.

3、Topdressing nitrogen recommendation for early rice with an active

To increase NUE and ensure an optimum yield for rice, N fertilizer is often topdressed two to three times at mid- and late-growth stages.

Effects of urea topdressing time on yield, nitrogen utilization, and

These findings provide a theoretical and practical basis for implementing high-quality, high-yield, and high-efficiency 4R nutrient stewardship (right source, right method, right rate and right timing) technologies for heavy panicle mechanical direct-seeding hybrid indica rice.

Grain Yield and Milling Quality Response of Two Rice

Lodging and grain yield data were collected and used to determine net returns at high and low rice and N prices. Rice grain yield and net returns were maximized at a seeding rate of 323...

Topdressing nitrogen recommendation for early rice with an active

Fertilizing based on soil test and crop nitrogen (N) demand is the key to optimize yields and minimize fertilizer cost. In 2008, a field experiment with different N rates was conducted with early rice near Yingtan City, Jiangxi Province, in southern China.

A weather‐adaptive topdressing method to enhance rice yield in

We proposed a novel rice production strategy to increase grain yield under different weather conditions in southwestern Japan. A novel weather-adaptive topdressing method was proposed. SPAD readings were one of significant predictors of rice yield under high solar radiation.

The best topdressing period for 7 crops such as corn and rice

The best topdressing period of rice : the absorption of nitrogen fertilizer by rice is gradually increased from the time of greening, and reaches the highest peak of fertilizer absorption at the peak of tillering.

Improving the yield and nitrogen use efficiency of hybrid rice through

Thus, the N 4 treatment with controlled-release N (60%) and urea-N (20%) as a base and urea-N (20%) as topdressing at the panicle-initiation stage proved effective in improving the grain yield and NUE of machine-transplanted hybrid indica rice.

Midseason application of organic fertilizer improves yield and nitrogen

Typically, organic rice growers apply manure before planting and may decide to add a top-dress of organic fertilizer-N at the end of the drain period, that is, just before reflooding.

As one of the world's major food crops, rice's high-yield cultivation techniques are crucial for global food security. Topdressing fertilization is a key measure to achieve high yields. Below is a detailed discussion on how to optimize rice topdressing for improved productivity:

I. Rice Growth Stages and Optimal Topdressing Timing

1. Tillering Stage: During the early tillering phase, applying nitrogen fertilizer promotes rapid tiller development, increases plant density, and enhances photosynthetic efficiency. Nitrogen should be prioritized to meet the nutritional demands of tillering.

2. Jointing and Booting Stage: At this stage, phosphorus and potassium fertilizers strengthen stems, improve lodging resistance, and support grain filling. Balancing phosphorus and potassium boosts stem health and nutrient accumulation.

3. Maturity Stage: A final nitrogen application during maturity ensures grain plumpness and yield. Nitrogen remains critical here to support grain development.

II. Strategies for Different Growth Stages

1. Tillering Stage:

   • Apply moderate nitrogen to stimulate tillering. Excessive nitrogen causes excessive vegetative growth, reducing light penetration and root development. Careful dosing avoids negative impacts.

2. Jointing and Booting Stage:

   • Prioritize phosphorus and potassium to strengthen stems and prevent lodging. These nutrients also enhance grain quality and yield. Proper ratios maximize output.

3. Maturity Stage:

   • A controlled nitrogen application prevents over-ripening and maintains grain quality. Overuse risks reduced taste or texture, so precise application is essential.

III. Application Methods and Key Considerations

1. Fertilization Techniques:

   • Use strip, hole, or ring application based on soil type and rice variety. Strip application suits wide-row fields, hole application narrow rows, and ring methods large fields.

2. Dosage Control:

   • Adjust fertilizer amounts according to soil fertility, rice variety, and growth stage. Typically, pure nitrogen should not exceed 150 kg/ha. Flexible adjustments prevent waste or deficiencies.

3. Timing:

   • Focus topdressing on tillering and jointing stages. Timely applications of balanced nitrogen, phosphorus, and potassium optimize growth and yield.

4. Fertilizer Selection:

   • Combine organic (e.g., manure, green manure) and inorganic fertilizers (e.g., urea, NPK blends). Soil tests and crop needs guide optimal mixes.

5. Post-Application Management:

   • Loosen soil after fertilizing to improve aeration and root growth. Monitor crop response and adjust strategies as needed.

Rice topdressing is vital for high yields. By aligning fertilization timing, selecting appropriate nutrients, and using scientific methods, farmers can maximize growth and productivity. flexible adjustments based on field conditions remain essential to achieve optimal results.