1、Effective potassium management for sustainable crop production based on

Potassium (K) is an essential macronutrient for sustainable crop production. The impact of exogenous K input on soil K apparent balance has been increasingly investigated; however, the effects of K input on K reserves and crop yields in soils with different characteristics are not well understood.

2、Effect of Different Potassium Fertilizer Application Rates on the Yield

Potassium (K) is crucial for global maize (Zea mays L.) production, yet the issue of “high K fertilizer input but low utilization efficiency” in K-rich soils of Xinjiang remains underexplored.

3、AGROOMY Potassium Recommendations

Once the removal rate is known, use the following formula to calculate how much potassium fertilizer should be added to replenish the soil’s potassium reserves.

(PDF) Potassium Management Strategy to Increase Potassium use

Efficient potassium management is essential to maximize crop yields while minimizing environmental impacts. This chapter explores strategies to enhance potassium use efficiency (KUE) in...

Optimal potassium management strategy to enhance crop yield and soil

Abstract BACKGROUND An unbalanced application of potassium (K) fertilizer usually destabilizes crop yield and affects soil K fertility. Developing a sustainable K management strategy requires improvements in crop yield without reducing soil K supply capacity over the long term.

Potassium Fertilizer Rate Recommendations: Does Accounting for Soil

Producers have the choice to apply K fertilizer at rates that (1) can “build and maintain” K as a stored resource in the soil, referred to as soil-test K (STK) from here on, or (2) are “sufficient” to attain a yield goal such as 95–100% of yield potential (Leikam, Lamond, and Mengel, 2003).

Optimizing rates and application time of potassium fertilizer for

Optimizing rates and application time of potassium fertilizer for improving growth, grain nutrients content and yield of wheat crop https://doi.org/10.1515/opag-2019-0049 received November 25, 2018; accepted May 6, 2019

Optimal potassium management strategy to enhance crop yield and soil

Abstract BACKGROUND: An unbalanced application of potassium (K) fertilizer usually destabilizes crop yield and affects soil K fertility.

Potassium transport and use efficiency for sustainable fertigation in

This review can potentially guide crop production and resource use efficiency in protected cropping, contributing to global food security and a better sustainable agricultural and environmental future.

Identifying the critical potassium inputs for optimum yield, potassium

Potassium (K) is a primary limiting macronutrient for plant growth. Inappropriate K application decisions can lead to reduced yield and potassium use efficiency (KUE). Given the scarcity and non-renewable nature of K resources, developing an indicator for critical K input is essential.

The amount of fertilizer used per mu (approximately 666.7 square meters) depends on various factors, including soil type, crop species, growth stage, and local climatic conditions. Potassium plays a critical role in plant growth, participating in energy conversion and metabolic processes, enhancing nitrogen absorption, improving disease resistance, and boosting crop quality.

1. Determining Requirements

First, it is essential to understand the crop’s potassium needs. Different crops have varying potassium demands. For example, legumes, potatoes, tomatoes, and peppers require higher potassium levels, while cereals like corn and wheat need relatively less.

Soil Testing

Conducting soil tests is crucial for determining potassium requirements. These tests provide data on soil potassium content, pH, organic matter, and nutrient levels (e.g., nitrogen, phosphorus, potassium). Such information helps farmers and agronomists calculate precise potassium needs for crops.

2. Fertilization Principles

After assessing crop requirements, apply potassium fertilizer based on the following principles:

• Base Application: Typically, 30%-50% of potassium fertilizer is applied as a base dressing to promote root development and long-term nutrient supply. The exact ratio depends on crop needs and soil conditions.
• Topdressing: For rapidly growing crops or those needing quick potassium replenishment, apply 10%-20% as topdressing during the growth season.
• Balanced Fertilization: Maintain appropriate ratios between potassium and other macronutrients (e.g., nitrogen, phosphorus, calcium, magnesium) to ensure balanced nutrition.

3. Fertilizer Dosage

Potassium usage varies by crop and soil conditions. General guidelines for potassium fertilizer per mu are:

• Low-Potassium Crops: 30-50 kg per mu.
• Medium-Potassium Crops: 50-100 kg per mu.
• High-Potassium Crops: 100-200 kg per mu.

4. Application Methods

Apply potassium fertilizer via drilling, hole placement, or furrow application, depending on crop habits and soil conditions. Combining potassium with nitrogen enhances nitrogen uptake efficiency.

5. Key Considerations

• Avoid Overapplication: Excess potassium can lead to soil salinization and hinder crop growth.
• Regular Soil Testing: Monitor soil nutrients and fertilizer effects periodically.
• Nutrient Balance: Ensure proper ratios of potassium to other nutrients (e.g., nitrogen, phosphorus, calcium, magnesium).
• Environmental Protection: Use eco-friendly potash products to minimize environmental impact.
• Scientific Management: Design fertilization plans and schedules based on crop cycles and soil conditions.

6. Case Study

In a rice-growing region with low soil potassium, farmers conducted soil tests revealing potassium levels at 70% of the normal standard. To address this, they applied potassium fertilizer during the rice growth period. By optimizing timing and dosage, they successfully improved yield and grain quality.

Optimal potassium usage per mu varies by crop, soil, and climate. Scientifically determining crop needs through soil testing and applying potassium rationally enhances growth, yield, and quality. Avoid overapplication, prioritize environmentally friendly products, and maintain balanced nutrient ratios to ensure sustainable soil health and comprehensive nutrition.