1、Impacts of nitrogen (N), phosphorus (P), and potassium (K) fertilizers

Soil nutrient deficiency is one of the significant challenges in grain production, particularly nitrogen (N), phosphorus (P), and potassium (K). These deficiencies not only reduce crop yields but also cause associated environmental issues, such as soil structure deterioration and ecosystem services diminution.

2、Global food security threatened by potassium neglect

However, potassium soil deficiency can reduce crop nutrient use efficiency for both nitrogen and phosphorus, potentially increasing the risk of nitrogen and phosphorus pollution.

3、Potassium and phosphorus transport and signaling in plants

Compared with N, the relatively low availability of K and P in soils limits crop production and thus threatens food security and agricultural sustainability. Improvement of plant nutrient utilization efficiency provides a potential route to overcome the effects of K and P deficiencies.

4、Phosphorus in soils and plants – facing phosphorus scarcity

Phosphorus accumulates in agricultural soils, representing a financial loss to farmers and increasing the risk of loss to water. The challenges facing phosphorus sustainability are varied, but many solutions are to be found in the plant–soil system.

5、(PDF) Soil Phosphorus and Potassium.

In soils with low solution phosphorus concentration and high phosphorus fixation, slow diffusion may seriously limit the ability of roots to obtain sufficient phosphorus. The hyphae of...

Global phosphorus shortage will be aggravated by soil erosion

Here the authors show that across the globe most nations have net losses of phosphorus, with soil erosion as the major route of loss in Europe, Africa and South America.

Contrasting Effects of Phosphorus and Potassium Deficiencies on Leaf

Management of P and K in agricultural systems is similar, since both move mainly by diffusion in soil. In maize (Zea mays L.), radiation capture is a consequence primarily of leaf area formation and senescence, but little is known about P and K interaction in determining both variables.

Dissection of Crop Metabolome Responses to Nitrogen, Phosphorus

Crop growth and yield often face sophisticated environmental stresses, especially the low availability of mineral nutrients in soils, such as deficiencies of nitrogen, phosphorus, potassium, and others.

Potassium depletion in soil threatens global crop yields

By wisely handling nutrients like nitrogen, phosphorus, and potassium together, we can reap multiple benefits, prevent pollution, boost crop yields, and minimise nutrient loss. It's about...

Influences of phosphorus and potassium deficiencies on the

Collectively, our results indicated that soil P deficiency, would inhibit soil CH 4 oxidation directly or indirectly through restricting rice plant growth, while K deficiency have slight effects on the activity and community composition of soil methanotrophs.

A deficiency of phosphorus (P) and potassium (K) in northern soils can severely impact crop growth, reduce yields, lower product quality, and harm soil health. The following analysis outlines the key effects and solutions:

1. Importance of Phosphorus Fertilizer

Phosphorus is an essential nutrient for plant growth, critical for cell division, elongation, and maturation. Phosphorus fertilizers promote root development, enhance stress resistance, and improve photosynthetic efficiency, all of which contribute to higher crop yields.

2. Importance of Potassium Fertilizer

Potassium regulates water balance in plants, strengthens stress resistance, and supports protein synthesis, thereby improving crop quality. It also facilitates root absorption of water and nutrients, enhancing drought tolerance.

3. Symptoms of P and K Deficiency in Northern Soils

In northern regions, low soil organic matter and poor soil structure often lead to P and K deficiencies. Symptoms include stunted growth, yellowing leaves, poor root development, reduced stress resistance, and declines in yield and quality.

4. Impacts of P and K Deficiency

(1) Crop Growth and Development

Deficient soils result in short, weak plants with pale leaves, sparse tillering, fewer flowers/fruits, smaller grains, and susceptibility to pests and diseases.

(2) Yield Reduction

Yields may drop by over 50% in severe cases due to restricted growth.

(3) Quality Degradation

Fruits become less flavorful, vegetables lose color, and grains have lower starch content, reducing market appeal.

(4) Soil Health Decline

Long-term deficiency reduces soil microbial activity, decreases beneficial organisms, and lowers organic matter, accelerating soil degradation.

5. Solutions for P and K Deficiency

(1) Apply P and K Fertilizers

Use phosphate fertilizers like superphosphate, diammonium phosphate, or monoammonium phosphate, and potassium sources such as potassium sulfate, potassium chloride, or potassium nitrate to replenish soil nutrients.

(2) Improve Soil Conditions

Enhance soil structure through deep tillage (to increase aeration and water retention) and balanced fertilization to boost nutrient absorption.

(3) Crop Rotation

Rotate crops (e.g., alternate corn with wheat or soybeans) to reduce nutrient depletion and maintain soil fertility.

(4) Biological Measures

Apply organic fertilizers (e.g., composted manure) to enrich soil organic matter and microbial fertilizers to promote beneficial microorganisms, restoring ecological balance.

Phosphorus and potassium deficiencies are widespread in northern soils, posing significant threats to crop productivity and sustainability. Addressing this issue requires integrated strategies, including fertilizer application, soil improvement, crop rotation, and biological interventions. Comprehensive action is essential to restore soil health, ensure robust crop growth, and achieve sustainable agriculture.