When to use foliar fertilizer is more effective

Instructions for use of foliar fertilizer spraying (taking wheat and rice as examples):

Spraying time: depending on the degree of cultivated land pollution, you can choose to spray cadmium foliar fertilizer 1-2 times from the vigorous tillering period of rice and wheat to the heading period; Choose a sunny or cloudy day to spray around 4 p.m.

Dosage description: about 1 bottle of cadmium desnoryl per mu each time, a bottle of 500 ml; Artificial spraying needs to be mixed with water 50-100 times; UAV spraying with water 5-10 times; Foliar sprays are applied. Based on the principle of foliar dripping, the number of spraying should be increased according to the degree of pollution of cultivated land.

Precautions for the use of foliar fertilizer in rice:

1. When using, it should be used now, and the prepared cadmium foliar fertilizer should not be stored for a long time.

2. Foliar spraying is required with a sprayer with good atomization effect.

3. Do not use it in rainy days, if it rains 24 hours after spraying, it needs to be supplemented. Do not spray when exposed to the sun to avoid burning the leaves.

4. Do not spray with pesticides or other foliar fertilizers, so as not to affect the effect.

5. Store in a ventilated and cool place. When spraying, you need to wear gloves, masks, and work clothes to prevent the entrance from entering the eyes, and splashing ** should be quickly cleaned with water.

6. Keep out of reach of children to prevent children from eating by mistake.

Hope it helps

Foliar fertilizer is simply through foliar spraying, to supplement nutrients to plants, the main component of foliar fertilizer is the large, medium and trace elements required by plants, the more common is the medium and trace elements, such as boron, calcium, magnesium, zinc and other elements of fertilizer.

So how do we use foliar fertilizer better?

For large, medium and trace elements, plants are needed at all stages of growth, but the size of the demand is a problem, so we only need to supplement reasonably according to the different needs of plants

Although plants need a variety of nutrients, but in the whole growth period of plants, nitrogen, phosphorus, potassium and boron and calcium elements participate in the whole growth process of plants, other nutrients are reasonably supplemented according to the needs, and plants can be very good without frequent supplements, so we focus on nitrogen, phosphorus, potassium and boron and calcium elements when we choose foliar fertilizer.

For boron-calcium fertilizer, it is recommended to use it from the plant after flowering or germination, 1-2 times before flowering, 2-4 times after flowering, and for vegetables or plants with repeated fruiting, from before flowering, foliar sprays should be applied once every 7-15 days.

For boron-calcium foliar fertilizer, combined with the current weather and soil root characteristics, it is recommended to use boron-calcium foliar fertilizer containing organic acid, which not only makes boron and calcium really complex together to form a whole, and plant boron and calcium supplementation is better, but also can promote the absorption and transformation of other nutrients by plants, and improve plant disease resistance and stress resistance.

In general, in the process of fertilization, it is necessary to control all aspects, and you can't eat too much at one time. If you want to buy foliar fertilizer, it is best to go to some specialized stores, and do not choose to buy some inferior ones. Foliar fertilizer has a good effect, and some water can be added appropriately when fertilizing.

It is best to use it once every two months or so, which is very good Point 1: Using too much will definitely cause the leaves to rot Point 2 is likely to cause the effect of the whole seedling is not very good Point 3: Be sure to take a scientific approach to fertilization.

Use it once every 10 days or so, and the effect is the best. If you use too much, it may have a serious impact on crops, causing yellowing of branches and leaves, rotting roots, and severe fading of the page, affecting the flowering and fruiting of crops.

Generally, spraying twice a month is sufficient; Excessive use may cause harm to crops, resulting in the symptoms of burning leaves and seedlings in crops, and in severe cases, it will also cause a large area of yield reduction or even extinction.

1. When the root system of crops becomes old and the absorption capacity becomes weak, foliar fertilizer is applied.

In the middle and late stages of annual crop growth and development, the root charm declined and the fertilizer absorption function decreased. If you want to fertilize crops, the root application method cannot meet the needs of crops, and it is suitable to use foliar sprays.

2. When crops are deficient, foliar fertilizer must be applied.

In the case of crop growth and development, its function has already shown some trace element inattention symptoms, if the soil layer is used to fertilize, it must pass a certain period of time before the nutrients can be digested and absorbed by the crop, and the symptoms of crop deficiency cannot be immediately alleviated. At this time, if you choose foliar fertilizer, you can make full use of the advantages of fast digestion and absorption of foliar fertilizer, so that nutrients can quickly enter plant cells according to the leaves, and deal with the problem of nutrient deficiency.

3. When the growth and development of crops suffer from poor environmental hazards, foliar fertilizer must be applied.

When the soil quality is not good for the growth and development of crops, such as too much water or drought, the soil layer is acidic or too alkaline, it will lead to the digestion and absorption of nutrients by crop roots, and the crops must quickly resume normal growth and development.

4. Quickly fill in the medium and trace elements, and apply foliar fertilizer as much as possible.

Some chemical fertilizers such as phosphorus, iron, manganese, copper, zinc fertilizer, etc., if applied as roots, are very easy to be fixed by soil colloidal adsorption, reducing the actual effect of application. The selection of foliar spraying is not easy to be limited by soil characteristics, and has the advantages of less fertilizer, good effect, high utilization rate, safety, and green environmental protection.

5. When the fertilizer on the soil layer cannot be operated, foliar fertilizer must be applied.

For the crops covered with plastic film, the land that is not paved with drip irrigation pipes, in the case of insufficient amount of basal fertilizer, the selection of soil layer fertilization can not be carried out, so it is necessary to use foliar fertilizer spraying to fill the need for nutrients. However, some deep-rooted crops have more intake of some trace elements, and if the traditional fertilization method cannot be applied to the root digestion and absorption position, and its fertility cannot be fully utilized, foliar spraying can obtain good practical results. The use of foliar fertilizer can make crops more digestible and absorbed, which not only saves the amount of fertilizer applied, but also alleviates the environmental pollution of soil layer and water resources, which is a reasonable fertilization technology that kills two birds with one stone.

The actual effect of foliar fertilizer is directly related to the ambient temperature, environmental humidity, wind speed, etc., and it is best to carry out foliar spraying before 9 o'clock in the morning when there is no wind to enter the rainy day or the ambient humidity is relatively large, and the water surface evaporation is small, and the most suitable is to carry out after 4 o'clock in the afternoon, if it is 3 or 4 hours after the spray, it is necessary to carry out supplementary spraying.

For example, if the leaves fall too much or the fruit cannot grow, and it looks like it wants to wither, it needs to be beaten. Probably used at night.

The leaves are yellow, the root system of the crop is aging, the crop is defertilized, and the crop lacks the corresponding trace elements, which is affected by the adverse environment; Foliar fertilizer is better sprayed before 10 a.m. and after 4 p.m.

When crops are deficient in trace elements, nutrients are insufficient, when the roots of crops are aging, and when the leaves turn yellow and fall. Before 10 a.m. and after 4 p.m.

<> The fertilizer effect of foliar fertilizer is generally about 15-20 days. Precautions when spraying: Before use, add a suitable amount of water to dilute the slag finger brother, so as to avoid burning seedlings and excess nutrients due to excessive concentration; When using foliar fertilizer consistently, strictly follow the application instructions on the product label.

Generally, the key periods of vegetable seedlings, first flowering or middle and late stages are the best times for spraying foliar fertilizer. Choose cloudy or sunny days in the morning and evening spraying, the effect is better, should avoid spraying in the scorching sun, after the rain should be timely sprayed.

Foliar fertilizer use tips and precautions.

1. Prepare the best foliar fertilizer concentration.

Spraying foliar fertilizer to grasp the optimal concentration can achieve twice the result with half the effort. If the concentration is too high, it is easy to cause fertilizer damage or toxinism; The concentration is too low to achieve the purpose of fertilization. The optimal concentration of commonly used fertilizers is:

Urea to 1 percent, diammonium phosphate to 1 percent, calcium chloride to 1 percent, zinc sulfate to .

2. Master the best spraying amount.

Spray 50 to 60 kg of fertilizer per mu, and the atomization degree of the sprayer should be improved as much as possible when applied. Generally, it is advisable to spray vegetables 2 to 4 times during the whole growing season.

3. Choose the best spraying site.

The quality of foliar topdressing effect is related to the speed of the movement of spraying elements in the plant, the elements with strong mobility are nitrogen, phosphorus, potassium, sodium, etc., all the elements that can move but are not mobile are phosphorus, sulfur, etc., and some of the moving elements are iron, copper, manganese, molybdenum, etc. Elemental fertilizer solutions that are immobile or have little mobility work better when sprayed on new leaves.

4. Reasonably mix chemicals and fertilizers for spraying.

Mixed spraying between various foliar fertilizers, or mixed spraying of fertilizers and pesticides, can play a multi-effect role in one spray, but the nature of fertilizers and pesticides should be clarified first when mixed spraying. If the nature is opposite, it should never be sprayed in combination. When preparing the mixed solution, it must be stirred evenly, and it is now used, generally a fertilizer is prepared into an aqueous solution, and then other fertilizers are directly added to the prepared fertilizer solution according to the dosage, and the solution is shaken well and then sprayed.