1、Potassium fertilization enhances both cereal yield and soil organic

This meta-analysis suggests that potassium fertilization increases cereal yield by 19.3% and soil carbon by 4.4%, supporting both food security and climate mitigation.

2、Optimizing potassium and nitrogen fertilizer strategies to mitigate

To comprehensively investigate the impact of KF on GHG emissions, we uniformly collected data from both long-term and short-term field fertilization experiments.

3、A meta‐analysis highlights globally widespread potassium limitation in

Potassium (K +) is the most abundant inorganic cation in plant cells, playing a critical role in various plant functions. However, the impacts of K on natural terrestrial ecosystems have been less studied compared with nitrogen (N) and phosphorus (P).

4、Long

We analyzed soil properties, microbial biomass carbon and nitrogen, enzyme activities, and microbial communities in a long-term field experiment initiated in 1992 with K fertilization and varying wheat straw return amounts.

Effect of nitrogen, phosphorus and potassium fertilization management

We recommend that the optimum fertilization ratio of Sapindus mukorossi was 0.96Kg N, 0.80Kg P and 0.64Kg K per plant. Reasonable fertilization can improve soil fertility and leaf physiological traits, while excessive fertilization has negative effects on soil fertility, leaf physiology and yield.

Ongoing soil potassium depletion under intensive cropping in India and

Potassium (K) is essential for plant growth and vital for soil health. However, despite high crop demand, K fertilization continues to be ignored or severely inadequate in Indian agriculture.

Revisiting potassium

Soil potassium (K) deficit is extremely challenging for global food security, necessitating optimal K-fertilization strategies to reconcile crop productivity and soil fertility.

Exogenous Application of Nitrogen (N) and Potassium (K) Improves

In a study, Zhang et al. (2021a) reported that N fertilization mitigated the adverse impacts of drought on photosynthetic rate and stomatal conductance in temperate trees.

Nitrogen, phosphorus, and potassium co‐limitation in terrestrial

Abstract and Figures Societal Impact Statement Nitrogen, phosphorus, and potassium are essential elements for plant growth and are the primary nutrients in commercial fertilizers.

Long

Imbalanced fertilization without potassium (K) is a worldwide phenomenon in K-rich soils, but its long-term effects on soil quality are poorly understood.

Impacts of Excessive Potassium Fertilization on Trees

Potassium fertilizer is one of the essential nutrients for plant growth, playing a critical role in the development and health of trees. improper or excessive use of potassium fertilizer can have negative effects. Below are the impacts of excessive potassium fertilization on trees and corresponding countermeasures:

1. Impacting Root Development Excessive potassium may inhibit root growth, compromising a tree’s ability to absorb water and nutrients. This leads to slow growth, reduced stress resistance, and potential root rot. To address this, adjust potassium application to maintain optimal soil potassium levels. Improve soil moisture retention through enhanced soil management to promote healthy root development.

2. Affecting Fruit Quality Overapplication of potassium can reduce fruit quality, causing rough skin, soft flesh, and poor taste. Excess potassium may also lead to overly high sugar content, altering flavor and nutritional value. Prevent these issues by applying potassium judiciously and tailoring fertilization protocols to tree species and growth stages.

3. Altering Soil pH Excess potassium can disrupt soil acidity or alkalinity (pH), interfering with the absorption of other nutrients. Monitor and regulate potassium dosage to prevent extreme pH fluctuations.

4. Causing Seedling Burn High potassium concentrations in soil can damage roots, leading to "burning" and stunted growth. Avoid this by strictly controlling potassium levels to prevent toxicity.

5. Inducing Soil Compaction Excess potassium contributes to soil compaction, reducing透气性（aeration）and drainage. Roots may suffer from oxygen deprivation. Mitigate this by limiting potassium use and improving soil structure.

6. Promoting Soil Salinization Overuse of potassium fertilizer can increase soil salinity, hindering plant growth. Prevent salinization by avoiding excessive applications and balancing nutrient inputs.

7. Increasing Pest and Disease Risks Elevated potassium levels may create conditions favorable for pests and diseases. Maintain moderate potassium application to reduce susceptibility.

8. Disrupting Soil Microbial Activity Excess potassium can suppress beneficial soil microorganisms, destabilizing ecosystem balance. Ensure balanced fertilization to preserve microbial diversity.

9. Interfering with Nutrient Uptake Overemphasis on potassium may reduce the absorption of other essential nutrients. Use potassium carefully to avoid nutrient imbalances.

10. Hindering Photosynthesis Excess potassium can impair photosynthetic efficiency by altering enzyme activity. Regulate potassium input to safeguard energy production in trees.

Excessive potassium fertilization poses significant risks to tree health. To minimize adverse effects, follow these guidelines:

• Apply potassium based on soil tests and tree requirements.
• Adjust fertilization strategies for different tree species and growth phases.
• Enhance soil quality through improved management practices.

By adopting a balanced approach, trees can thrive while avoiding the harm caused by over-fertilization.