How long does it take for fertilizer to be absorbed after being applied to the soil? Read on and you'll understand!
A farmer friend inquired: How many days does it take for potassium fertilizer to be absorbed? The agricultural technician replied: This question is incorrect. The absorption of fertilizer is related to various factors, so it cannot be generalized. Many farmer friends have misunderstandings about the absorption of fertilizer nutrients by crops. Today, let me explain in detail the relevant issues related to fertilizer absorption.
The degree of fertilizer absorption is related to various factors
During the plant growth cycle, the roots of plants are constantly absorbing water and nutrients. Therefore, after fertilization, plants can immediately absorb nutrients. Of course, the amount and degree of absorption are greatly influenced by the environment and the degree of water solubility of the fertilizer. For example, nitrogen and potassium are easily absorbed and utilized, and crystalline forms are more easily absorbed into plants than powdered forms. Some nutrients that are difficult to be absorbed and utilized, such as calcium, boron, and ionic minerals, need to be converted into certain forms before they can be absorbed and utilized.
Products produced using new technology are conducive to the absorption of fertilizers
The farmer friend said again, "That's not right. Many teachers say that phosphate fertilizer doesn't move in the soil.".
It goes like this. Due to the previous fertilizers being primarily granular, the range of available phosphorus movement was relatively limited. However, with technological advancements, many modern fertilizers exhibit high water solubility. Therefore, if you use a fertilizer with high water solubility, it can be absorbed by plants on the day of application, provided the environmental conditions are suitable. In essence, whether the applied nutrients can be absorbed and utilized by plants depends on factors such as soil nutrient concentration, soil moisture content, temperature, fertilizer type, and fertilizer solubility.
Three forms of soil nutrient migration
Soil nutrient migration occurs in three forms: interception, mass flow, and diffusion. Nitrogen primarily migrates through mass flow, while phosphorus and potassium primarily migrate through diffusion. In terms of soil nutrient concentration and soil moisture content:
When the concentration is high, the root system is exposed to a larger amount of nutrients, resulting in more nutrient uptake;
The concentration gradient is large, resulting in more nutrients diffusing to the root surface;
High water content leads to faster water flow, while high concentration results in a greater amount of nutrients per unit volume. Additionally, mass flow carries more nutrients. These are some of the factors that affect the rate at which plants absorb nutrients.
Additional Trivia: Nine Factors Affecting Fertilizer Absorption
1. An excess of nutrients can affect the effectiveness of fertilization. When plants lack a certain element, physiological disorders will occur, affecting normal growth. However, if a certain element is excess, it will interfere with the absorption of other elements, similarly impeding plant growth.
2. The pH level affects the effectiveness of fertilizers: The fertilizer efficiency is optimal when the pH range is between 5.5 and 6.5. For example, nutrients such as iron, copper, manganese, and zinc are most effective when the pH is below 6.
3. Different growth stages affect the effectiveness of fertilizers: During the vegetative growth stage, nitrogen-based fertilizers with balanced nitrogen, phosphorus, potassium, and trace elements are used; during the bud differentiation and flowering stages, phosphorus and potassium-based fertilizers are primarily applied to promote root development and flowering.
4. Different physiological characteristics of plants affect the effectiveness of fertilizers: When using specialized fertilizers, corresponding other types of water-soluble fertilizers should be used according to the actual physiological conditions.
5. Different media affect the effectiveness of fertilizers: The fertilizer formulas differ between soil cultivation and soilless cultivation.
6. Different water quality affects the effectiveness of fertilizers: Apply acidic fertilizers or soften water quality in hard water areas, and regularly supplement calcium and magnesium fertilizers in soft water areas.
7. The timing of fertilization affects the effectiveness of fertilizer: The best time for fertilization is before 10 am and after 4 pm. Avoid fertilizing during midday when the sun is strong, and avoid fertilizing on rainy or cloudy days.
8. The type of fertilizer affects the effectiveness of fertilization: Different formulas of fertilizers should be used for different flowers and during different growth stages. Slow-release fertilizers should be applied in combination with water-soluble fertilizers, and root application should be combined with foliar spraying. Targeted fertilization can reduce costs and improve fertilization efficiency.
9. Imbalanced fertilizer content ratio affects the effectiveness of fertilization: Scientific fertilization aims to promote mutual absorption among various elements and avoid antagonism.
