What kind of foliar fertilizer is best for crops (under what circumstances is foliar fertilization effective)

What kind of foliar fertilizer is best for crops (under what circumstances is foliar fertilization effective)

Foliar fertilizer is a purposeful method of making one or more fertilizers into an aqueous solution of a certain concentration and spraying it on the leaves of crops to provide the nutrients needed by the crops and regulate their growth. It is also called foliar fertilization.

As an auxiliary and supplement to rhizosphere fertilization, foliar fertilizer can specifically supplement the nutrients needed by crops, especially trace elements, and play an important role in increasing crop yields and improving product quality.

At present, there are many types of foliar fertilizers on the market, and there are hundreds of them registered and certified by the national agricultural management departments alone. There is still a lack of a unified classification standard.

In production, foliar fertilizers can be divided into three categories according to their effects on crops: nutrient supply type, growth regulation type, and dual-purpose type.

When using foliar fertilizer, you should consider the specific situation and not use it blindly. If the crop shows the following phenomena, you should add nutrients to the foliage.

1. When the crop root absorption capacity is weak .

2. When top dressing of crop roots is not possible.

3. After crops are hit by natural disasters.

4. When crops are at the critical period of fertilizer demand.

5. Crops suffer from nutrient deficiency, especially due to the lack of trace elements that are difficult to move in the crop body.

Principles of foliar fertilization:

1. Choose appropriate fertilizer according to the growth conditions of crops

The selection of foliar fertilizer should be targeted and purposeful, and the required foliar fertilizer should be selected according to the urgent needs of the crop and the expected effects to be achieved.

2. Choose the appropriate foliar fertilizer according to the characteristics of various nutrients and crop varieties

Spraying phosphate fertilizers in the late growth period of cereal crops can help them mature earlier. Cotton seedlings are affected by low temperatures and their root absorption capacity is weak. Spraying urea can increase leaf area, strengthen photosynthesis, promote reproductive growth, and form strong seedlings. It is strictly forbidden to spray fertilizers containing chloride ions on crops that are sensitive to chlorine.

3. Reasonable concentration

If the concentration of foliar fertilizer is too high, it may cause fertilizer damage; if the concentration is too low, the purpose of fertilization cannot be achieved.

Therefore, it is necessary to master the reasonable spraying concentration, such as: urea 0.5%~1.0%, potassium dihydrogen phosphate and ferrous sulfate 0.2%~1.0%, magnesium sulfate 0.1%~0.2%, borax 0.05%~0.10%, and calcium chloride 0.3%~0.5%.

4. Determine the spraying location based on the element's mobility, and the number and quantity of spraying should be appropriate

5. Apply fertilizer to the leaves at the right time to ensure that the solution has enough time to moisten the leaves

The length of time the solution wets the leaves directly affects the effect of the leaves absorbing nutrients, and is generally required to be maintained at 0.5~1.0h. Wetting agents can be added to the solution to reduce the surface tension of the solution, increase the contact area with the leaves, and improve the absorption effect.

Issues that should be paid attention to when applying foliar fertilizer

1. Choose safe and pollution-free foliar fertilizers registered and certified by the Ministry of Agriculture.

2. Use according to the specified concentration.

3. Do not spray at high temperatures.

4. Stir thoroughly before spraying, completely blend it into water, atomize it finely, and spray it evenly.

<<:  Can I use an oil drum to cover the Christmas cactus during the winter? (How to keep the Christmas cactus warm in winter)

>>:  What fertilizer is best for sunflower topdressing (what fertilizer does sunflower need to be flushed for absorption in the early stage)

Recommend

How to plant crabapples? Can they be grown outdoors in winter?

1. Planting method 1. Time: The time for planting...

Can cherry trees be planted outside your home?

Can cherry trees be planted outside your home? Ch...

Tips to make flowers and leaves greener, tips to make plants greener

1. Folk remedies to make flower leaves greener 1....

Can charcoal be used to grow orchids?

Can charcoal be used to grow orchids? Charcoal ca...

What are the cultivation methods and precautions of Panax notoginseng?

Method of cultivating Panax notoginseng Notoginse...

What are the cultivation methods and precautions of Jade Leaf?

Introduction to Jinzhiyuye Jade leaf is also call...

How to change the soil and pot of flamingo

Time to change soil and pot for flamingo Flamingo...

How to care for strawberries in winter

Are strawberries afraid of freezing? Strawberries...

How many years does it take for lemons to bear fruit?

Introduction to growing lemons Lemon prefers a wa...

The Feng Shui Effect of Clivia

1. Improve career fortune Its blooming period is ...

How to fix the yellowing leaves of green violet?

Green pansy, as a common indoor ornamental plant,...

The causes and treatments of the yellow leaves of Ruyi Queen

1. Improper watering 1. Reason: Excessive waterin...

Can fertilizer water be used to water flowers directly? How to use it correctly?

Fertilizer water directly watering flowers Fertil...

How often should I change the water for hydroponic lucky bamboo?

1. Water changes Before the hydroponic lucky bamb...