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What is Foliar Fertilizer?

2022/07/11

 

When it comes to fertilization, we tend to think of soil fertilizers or organic fertilizers first. However, agricultural experts have a secret weapon to improve crop quality - foliar fertilizer.

Foliar fertilizer is a type of fertilizer designed specifically for nutrient absorption through the leaves. It can be sprayed directly onto the leaves, allowing the nutrients to reach the crops quickly and efficiently.

 

Advantages of Foliar Fertilizer

  • High nutrient utilization efficiency Ordinary soil fertilizers must be selectively absorbed by the roots and then transported to the plants. In contrast, foliar fertilizer can be absorbed directly through the leaf stomata, resulting in a utilization efficiency several times higher than that of soil fertilizers.

  • Solving the problem of nutrients that are not easily movable Nutrients such as phosphorus, copper, manganese, zinc, and iron are easily fixed by the soil and cannot be absorbed and utilized by crops. Calcium and boron are also difficult to move within the plant, leading to nutrient deficiency. As foliar absorption is not selective, it can provide comprehensive nutrition.

  • Providing special nutrients for specific crops When crops have specific nutrient requirements, foliar fertilizers can provide the necessary formula nutrients in a timely manner. For example, when crops are deficient in calcium and boron during the early stages, timely supplementation through foliar application can prevent disease caused by tissue softening. If applied through soil fertilization, the nutrients often arrive too late.

 

When to use and tips for using foliar fertilizers

  • Nutrient deficiency symptoms

When crops show symptoms of nutrient deficiency such as leaf chlorosis, yellowing veins, distorted leaves or fruits, and browning, foliar fertilizers can act as life-saving drips, supplying nutrients immediately to compensate for the lack of nutrients.

  • Poor soil or root system

When plant roots are damaged, underdeveloped, or when the soil pH is abnormal and the roots cannot absorb enough nutrients, foliar fertilizers can be used as a supplement to help crops grow quickly.

  • Continuous heavy rain

Heavy rain can cause the roots to soak in water for a long time, making it difficult for them to absorb water and nutrients. If fertilizer is applied to the soil, it can cause secondary damage to the roots. Foliar fertilizers can be used to supplement the nutrients needed after rain.

  • Continuous high temperature

When the roots cannot absorb nutrients properly due to high temperature, foliar fertilizers can provide crops with the necessary nutrients, helping them maintain physiological activity and ensuring the efficiency of photosynthesis during heat stress.