1、Comparison of Foliar and Root Application of Potassium Dihydrogen

Potassium dihydrogen phosphate (KH 2 PO 4) is a widely used foliar fertilizer for plant growth. Many studies showed that potassium (K) is a strong mobile element which did not show significant difference between foliar and soil supplies (Fan and Moshe 2002; Awad et al. 2014; Pande et al. 2014).

2、The role of potassium dihydrogen phosphate

Foliar application of 0.3% potassium dihydrogen phosphate can regulate the water balance in crops, reduce transpiration intensity, avoid excessive drying and dryness of crops, and resist drought and high temperature.

3、Scientific application of potassium dihydrogen phosphate

In boron-deficient soils and crops that are markedly effective on boron fertilizers, such as cotton, rape, and wheat, the use of potassium dihydrogen phosphate and boron fertilizers combined to increase production yield is significant.

How To Use Potassium Dihydrogen Phosphate On Plants

Potassium dihydrogen phosphate (MKP 00-52-34) is a highly effective water-soluble fertilizer notable for its composition of 52% phosphorus (P) and 34% potassium (K), essential for crop growth. Widely utilized in agriculture, it enhances optimal development during critical growth stages.

(PDF) Properties of potassium dihydrogen phosphate and its effects on

This study investigated the effect of potassium dihydrogen phosphate (PDP), synthesized (via conversion between potassium chloride and ammonium dihydrophosphate) and granulated with the...

News

Potassium has significant effects on improving crop yield, increasing fruit quality and increasing sugar content. There are several key periods when potassium dihydrogen phosphate is used. The first is the flower bud differentiation stage.

Potassium dihydrogen phosphate

Potassium dihydrogen phosphate (KH2PO4) is an inorganic salt with multiple uses. It is also known as monopotassium phosphate, potassium phosphate monobasic, potassium biphosphate, and potassium acid phosphate.

Why Is Potassium Dihydrogen Phosphate (KH₂PO₄) Considered the Best

Potassium Dihydrogen Phosphate (KH₂PO₄), also known as Monopotassium Phosphate (MKP), is a high-purity, fully water-soluble fertilizer that provides two essential macronutrients: Phosphorus (P₂O₅ ~52%) and Potassium (K₂O ~34%).

Potassium Dihydrogen Phosphate

Application Fields Fertilizer: foliar & fertigation for crops. Chemical: buffer, culture medium, fermentation aid. Pharma: pH regulator, bacterial culture. Food: flavor enhancer, nutritional supplement.

How Potassium Dihydrogen Phosphate Enhances Plant Growth and Soil Health

Potassium dihydrogen phosphate is commonly applied as a foliar spray, soil amendment, or as a component in hydroponic nutrient solutions. It is used on cereals, fruits, vegetables, and turfgrass.

Potassium dihydrogen phosphate (KH₂PO₄) is a commonly used foliar fertilizer primarily for nutrient supplementation and disease/pest control in plants. In agricultural production, rational use of foliar fertilizers can enhance crop growth rates, improve yield and quality, reduce chemical fertilizer usage, and protect both the environment and human health.

1. Functions of Potassium Dihydrogen Phosphate

Potassium dihydrogen phosphate is a compound fertilizer containing phosphorus (P) and potassium (K), with the following functions:

(1) Nutrient Supply

It provides essential phosphorus and potassium to promote crop growth. Phosphorus plays a critical role in plant development, photosynthesis, and stress resistance, while potassium enhances drought and disease resistance, improving overall stress tolerance.

(2) pH Regulation

It balances acid-base levels within plants, boosting photosynthetic efficiency. The P and K elements react with organic acids and bases in plants, optimizing internal pH for better light absorption.

(3) Nutrient Transport

Facilitates the transport and distribution of nutrients, thereby improving crop quality.

(4) Disease/Pest Resistance

Strengthens immune responses, enhancing resistance to diseases and pests, and reducing infection risks.

2. Application Ratios of Potassium Dihydrogen Phosphate

Application ratios vary based on crop type, growth stage, and climatic conditions. General recommendations include:

(1) Foliar Spraying

Apply 50–100 grams per mu (approx. 0.067 hectares), diluted in 5–10 kilograms of water, and spray evenly over leaves.

(2) Root Application

Mix 50–100 grams per mu into soil before fertilization.

(3) Drip Irrigation

Combine 50–100 grams per mu with irrigation water.

(4) Seed Soaking

Soak seeds in a KH₂PO₄ solution to improve germination rates and seedling vigor.

3. Precautions

• Avoid Overuse: Excessive application may accelerate growth at the cost of fruit quality and taste.
• No Alkaline Mixing: Do not combine with alkaline substances, as this reduces effectiveness.
• Timing Matters: Avoid use under high temperatures, intense sunlight, rain, or high humidity, as these conditions impair absorption.

Rational use of potassium dihydrogen phosphate is an effective strategy to boost crop growth, yield, and quality. To optimize results, follow recommended application methods and ratios, avoiding misuse or overapplication.