1、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.

2、Optimizing Nitrogen Fertilizer Management Enhances Rice Yield, Dry

According to the regression equation, the yield is higher when the amount of nitrogen application is 202.15 kg ha −1 and the fertilization frequency is four times.

3、How much fertilizer is required for a single mu of rice cultivation?

In this article, we have discussed the importance of fertilizer application in rice cultivation, including the ideal fertilizer application rate, factors affecting fertilizer application, and best practices for fertilizer application in different regions.

Exploring optimal crop management practices for high nitrogen

The total RE of nitrogen fertilizer was measured, and the REs of N fertilizers applied at PT, ET, PI and SD were analyzed by applying 15 N-labelled urea.

Contrasting fertilizer nitrogen contribution rates for achieving

Correspondingly, the fertilizer N contribution rates for achieving maximum grain yield ranged from 60.91% to 74.51% in double-cropped rice and from 46.90% to 49.65% in single-cropped rice.

How Many Pounds of Nitrogen Fertilizer per Mu for Rice?

The ideal nitrogen fertilizer rate for rice varies depending on several factors, including soil type, climate, rice variety, and existing nitrogen levels. However, a general guideline is to apply 100-150 kg of nitrogen per hectare.

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...

Application of Nitrogenous Fertilizer in Rice Production: A Review

Rice production can be increased by applying nitrogenous fertilizer either as organic or inorganic fertilizer at an appropriate dose, time, method, and place.

How to Calculate How Many Bags of Fertilizer for 1 Acre

A 50-pound bag of 20-5-10 fertilizer contains 20% nitrogen, meaning it holds 10 pounds of actual nitrogen (50 lbs multiplied by 0.20). Determining the appropriate application rate for your one-acre plot requires conducting a professional soil test. This analysis provides a baseline of existing nutrient levels and pH balance.

Nutrient Management in Rice Crops

One of the most common problems in rice production is Nitrogen deficiency. It usually takes place during crucial growth stages (panicle development), when plants need a greater amount of nitrogen.

Rice, as one of the most important food crops globally, has an immense demand for nitrogen fertilizer during its growth. Nitrogen, one of the three essential macronutrients for plant growth (along with phosphorus and potassium), is crucial for rice. Adequate nitrogen supply promotes stem and leaf development, enhances photosynthetic efficiency, and increases yield. rational application of nitrogen fertilizer is vital for ensuring high and stable rice production. Below is a detailed analysis of the appropriate amount of nitrogen fertilizer per mu for rice.

1. Types and Functions of Nitrogen Fertilizers

There are two main types of nitrogen fertilizers: urea (carbamide) and ammonium nitrate. Both provide nitrogen to promote the growth of crops like rice.

• Urea: A white, crystalline powder containing 46% nitrogen, it is a commonly used nitrogen fertilizer. It dissolves easily in water and is rapidly absorbed by plants. during decomposition, urea releases ammonia gas, which can volatilize into the air and pose risks of ammonia toxicity.

• Ammonium Nitrate: A white, granular or crystalline compound containing 17% nitrogen, it is another prevalent nitrogen fertilizer. It dissolves more readily than urea and releases nitrogen slowly, helping to control application rates and reduce volatilization losses.

2. Calculation Methods for Nitrogen Fertilizer Usage

Rational nitrogen application is key to healthy rice growth. Recommended amounts vary by region and rice variety:

Southern China

In the warm and humid southern regions, where climate favors rice cultivation, additional nitrogen may not be necessary. if soil tests indicate nitrogen deficiency or higher yields are desired, apply 5–10 kg/mu of urea or 10–15 kg/mu of ammonium nitrate.

Northern China

In drier northern regions, rice requires more nitrogen to support growth. Recommended doses are 8–12 kg/mu of urea and 12–18 kg/mu of ammonium nitrate. Due to slower spring growth in colder climates, delay topdressing to allow sufficient recovery time.

3. Timing and Methods of Application

Proper timing and methods maximize nitrogen use efficiency. Fertilization typically involves two stages:

• Base Fertilizer: Applied before planting, accounting for ~70% of total nitrogen. Choose urea or ammonium nitrate based on soil and rice variety. Spread evenly across the field to improve efficiency.

• Topdressing: Applied during critical growth stages (tillering, jointing, and heading) at 20%, 10%, and 5% of total nitrogen, respectively. Use furrow or hole application to minimize losses.

4. Key Considerations

• Avoid Overapplication: Excess nitrogen leads to excessive vegetative growth, reduced grain quality, and environmental pollution. Tailor applications to local climate and soil tests.

• Safety Precautions: Wear protective gear to avoid ammonia inhalation. Dispose of waste fertilizer properly to prevent environmental contamination.

Rational nitrogen management is essential for high and stable rice yields. Fertilization plans should consider soil conditions, climate, and rice varieties. By avoiding overapplication and prioritizing safety, farmers can ensure healthy crop growth and environmental sustainability.