1、Effects of Different Potassium (K) Fertilizer Rates on Yield Formation

As one of the most important nutrients for normal growth and development of plants, the content of potassium (K) in rice plant tissue is generally 2.0% to 5.0% [2].

2、How Much Fertilizer Per Hectare For Rice?

This comprehensive guide delves into the intricacies of rice fertilization, exploring the recommended fertilizer rates per hectare, the factors influencing these rates, and best practices for achieving balanced and sustainable rice production.

3、Effect of potassium rates on rice yields and potassium application

The results show that the K fertilizer application could obviously increase grain yields of early rice and late rice, and under a certain K fertilizer application range, the yield is increased with the increase of potassium application rate.

4、Potassium fertilizer management on rice cultivation. Journal of

ABSTRACT The purpose of the present study was to evaluate the effect of potassium on growth and yield of rice and to find out the best suited scheme / timing of potassium fertilizer...

5、Potassium Fertilizer Management on Rice Cultivation

The purpose of the present study was to evaluate the effect of potassium on growth and yield of rice and to find out the best suited scheme/timing of potassium fertilizer application for rice crop.

Fact Sheet_2_Potassium fertility

With this method, when soil extractable K is less than 60 ppm, K fertilizer is definitely needed. If extractable K is between 60 and 120 ppm, K fertility is on the lower end and it is likely that deficiency symptoms may appear.

IV.3 Nutrient calculator

When you buy a bag of fertilizer there is always an indication of the percentage of N, P and K in that bag. These numbers tell you how many kilograms of N, P 2 O 5 and K 2 O a 100 kg bag contains.

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.

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.

How Many Bags Of Fertilizer Per Hectare Of Rice?

The recommended amount of fertilizer for rice per hectare varies widely depending on factors like soil type, climate, rice variety, and desired yield. However, a general guideline is to apply 100-150 kg of nitrogen (N), 50-75 kg of phosphorus (P2O5), and 50-75 kg of potassium (K2O) per hectare.

The appropriate amount of potassium fertilizer for one mu of rice paddy depends on multiple factors, including soil type, crop species, growth stage, climatic conditions, and local agricultural practices. Potassium is a critical nutrient for plant growth, essential for enhancing disease resistance, promoting root development, and improving yield. Below, I will explain the suitable application rates and methods for different types of potassium fertilizers in rice fields.

1. Types and Functions of Potassium Fertilizers

a. Types of Potassium Fertilizers

• Potassium Sulfate: Commonly used for crops sensitive to potassium, such as corn and wheat.
• Potassium Chloride: Suitable for crops requiring high potassium concentrations, like potatoes and tomatoes.
• Potassium Nitrate: Preferred for crops that favor nitric nitrogen, such as soybeans and peanuts.
• Potassium Phosphite: Applied to phosphorus-loving crops, such as cotton and sugar beets.

b. Functions of Potassium Fertilizers

• Enhances Disease Resistance: Potassium strengthens crop immunity, reducing the incidence of diseases.
• Promotes Root Development: It stimulates root growth and improves nutrient uptake efficiency.
• Improves Yield and Quality: Potassium increases crop yield and enhances product quality.

2. Impact of Soil Conditions on Potassium Use

a. Soil pH

• Acidic Soils: Sulfate-containing fertilizers (e.g., potassium sulfate) are recommended to neutralize acidity.
• Alkaline Soils: Calcium-containing fertilizers (e.g., potassium chloride) can help balance pH.

b. Soil Texture

• Clay Soils: Require higher potassium doses due to strong water retention and nutrient fixation.
• Sandy Soils: Potassium leaches quickly, necessitating frequent replenishment.

c. Soil Organic Matter

• Organic-Rich Soils: Potassium availability is higher; reduce application rates.
• Low-Organic Soils: May require increased potassium to compensate for nutrient deficiencies.

3. Impact of Crop Type on Potassium Use

a. Potassium-Loving Crops

• Corn: Requires substantial potassium for optimal yield and quality.
• Rice: Needs potassium during growth stages to support photosynthesis in leaves.

b. Low-Potassium Crops

• Cotton: Excess potassium may cause boll shedding.
• Soybeans: Lower potassium requirements; overapplication can reduce yields.

4. Fertilization Timing and Methods

a. Timing

• Growth Stages: Apply potassium during critical periods (e.g., jointing, heading).
• Base Fertilizer: Apply before planting to provide seasonal potassium supply.

b. Methods

• Ditch Application: Spread fertilizer evenly in furrows and cover with soil.
• S穴Application: Directly apply near roots for targeted nutrition.
• Foliar Spraying: Spray during growth stages to improve absorption efficiency.

5. Precautions

• Avoid Overapplication: Excess potassium can lead to seedling burn or soil salinization.
• Soil Testing: Conduct pre-fertilization tests to assess soil potassium levels.
• Balanced Nutrient Use: Combine potassium with other nutrients (e.g., nitrogen, phosphorus) for optimal results.

the amount of potassium fertilizer for one mu of rice paddy should be determined based on soil conditions, crop type, growth stage, climate, and local farming practices. Scientific application ensures healthy crop growth and maximized yields.