1、Optimizing nitrogen, phosphorus, and potassium fertilization regimes to

In semi-arid regions of northwest China, the planting pattern of double ridge-furrow with full film mulching (DRFM) is widely used to improve maize productivity.

2、Exploring phosphorus fertilizers and fertilization strategies for

We argue that the improvement of the nutritional value of crops, especially cereals, through reduced phytic acid and increased zinc and iron contents should be among the most important drivers toward the development of innovative fertilizer products and fertilization technologies.

3、Effect of Phosphorus and Potassium Fertilizers Application on Soil

At Assosa, a field experiment was conducted to determine how soil chemical characteristics and accumulation of phosphorus and potassium in potato tissue responded to phosphorus and...

4、Effects of different fertilization practices on maize yield, soil

However, it remains to be determined whether fertilization practices with different combinations of nitrogen (N), phosphorus (P), potassium (K), and organic (O) fertilizers play a positive...

Effect of nitrogen, phosphorus and potassium fertilization management

Rational fertilization is the main measure to improve crop yield, but there are differences in the optimal effects of nitrogen (N), phosphorus (P) and potassium (K) rationing exhibited by the same crop species in different regions and soil conditions.

Understanding phosphorus fertilizers

How to manage phosphorus for profitable crop production in Minnesota. Covers phosphorus sources, strategies for determining fertilizer needs and more.

The Influence of Mineral NPK Fertiliser Rates on Potassium

When using high nitrogen (180 kg ha−1) and phosphorus (160 kg ha−1) fertiliser rates, 160 kg ha−1 of potassium is needed. The highest potassium uptake, reaching 51.6%, was achieved when plants had been fertilised with nitrogen (108 kg ha−1), phosphorus (96 kg ha−1), and potassium (96 kg ha−1).

Phosphorus and Potassium Fertilizer Effects on Alfalfa and Soil in a

Yield responses to P are typically most evident at the first harvest of the season; however, the efficiency of P fertilization may be influenced by application timing (James et al., 1995).

Recent advances in the chemistry of nitrogen, phosphorus and potassium

Generally, P and K fertilizers are less prone to loss when applied in soil; therefore, under ideal conditions (absence of excess rainfall and flat/gentle slope field), the losses of P and K spread on the soil surface is negligible and can be efficiently used in crop fertilizer management.

Fertilization with Phosphorus, Potassium, and Other Nutrients

Phosphorus and potassium are the two primary macronutrients nonmobile in the soil (see Chap. 2). When applied as fertilizer, both nutrients are quickly fixed in the soil solid fraction, mainly by adsorption or precipitation.

In northern regions, applying phosphorus (P) and potassium (K) fertilizers during winter is a common agricultural practice, particularly when crops grow slowly or require nutritional supplementation. Below is a detailed explanation of this approach:

1. Roles of Phosphorus and Potassium Fertilizers

• Phosphorus (P) and potassium (K) are essential elements for plant growth and development. They significantly impact photosynthesis, root development, stress resistance, and fruit quality.
• Phosphorus fertilizer promotes sturdy stems, enhances plant resilience, and improves resistance to pests and diseases.
• Potassium fertilizer boosts drought tolerance, increases fruit firmness and sweetness, and improves crop quality.

2. Climatic Characteristics of Northern Winters

• Northern winters feature low temperatures, insufficient sunlight, and frozen soil, all of which hinder normal crop growth.
• Crops grow slowly in winter and require additional nutrients to survive and develop.
• Soil moisture levels are low, affecting fertilizer dissolution and absorption efficiency.

3. Timing for Applying Phosphorus and Potassium Fertilizers

• Fertilization should occur after soil thawing in spring or autumn to avoid fixation of nutrients in frozen soil and reduce waste.
• Dosage: Determined by local soil fertility and crop needs. Typically, apply 50–100 kg/mu of compound fertilizer, or 10–15 kg/mu of single-nutrient phosphorus and potassium fertilizers.

4. Application Methods

• Phosphorus fertilizer: Apply deeply or shallowly to facilitate root absorption. Shallow application suits nutrient-demanding crops like fruits and vegetables.
• Potassium fertilizer: Deeply apply near roots to improve utilization rates.
• Irrigate immediately after fertilization to aid dissolution and root absorption.

5. Precautions

• Loosen soil before fertilization to improve structure and nutrient uptake.
• Avoid applying near crop roots to prevent burning.
• Do not overapply to avoid nutrient loss or environmental pollution.

6. Combining Phosphorus-Potassium Fertilizers with Others

• Complement with nitrogen and micronutrient fertilizers to meet year-round crop needs.
• Mix with organic fertilizers (e.g., well-decomposed animal manure) to enhance efficacy and reduce environmental impact.

7. Alternatives to Phosphorus-Potassium Fertilizers

• Use organic fertilizers (animal manure, green manure) for sustained, balanced nutrition.

• In extremely cold regions, consider microbial fertilizers (e.g., mycorrhizal fungi) to improve soil structure and plant resilience.

• Applying phosphorus and potassium fertilizers in northern winters is an effective agricultural management strategy, supporting healthy crop growth under harsh conditions.

• Optimal timing and methods maximize yield improvements, crop quality, and safety.

• Prioritize careful selection, dosage, application techniques, and timing to ensure effectiveness and environmental sustainability.