How to apply foliar fertilizer? What are the precautions for the use of foliar fertilizer?

Foliar fertilizer should be used according to the needs of plant growth. Foliar fertilizer application requires attention to its solubility, acidity, concentration, and spraying time.

Foliar fertilizer should be used according to the needs of plant growth, such as leafy vegetables, suitable for spraying foliar fertilizer in the early stage of growth, and melon and fruit vegetables are suitable for spraying foliar fertilizer after fruiting, which can prevent premature senescence of plants, and can improve the stamina of plants, which will make the plants grow more melons and fruits.

Root vegetables will mostly use foliar fertilizer in the middle of growth, each growing season needs to be used 3 4 times, each time can be separated by 10 15 days, the use of foliar fertilizer can make clean vegetables grow faster and better quality, in addition to the use of foliar fertilizer to pay attention to the supplement of phosphorus and potassium fertilizer, because phosphorus and potassium are important nutrients needed for the normal growth of root vegetables. When using foliar fertilizer for plants, it is also necessary to choose the right time, and use foliar fertilizer when they encounter pests and diseases, which can improve the plant's disease resistance.

When the soil is acidic and alkaline or the salinity is too high, the use of foliar fertilizer is conducive to the absorption of effective nutrients by plants, because there are problems in the soil at that time, which is not conducive to the absorption of nutrients by the roots, and sufficient nutrients are absorbed by the leaves, which is conducive to the normal growth of plants.

Foliar fertilizer must pay attention to its solubility when using, it is a particularly solubility of fertilizer, soluble in water, when spraying foliar fertilizer should be used with the mix, do not prepare the liquid fertilizer for a long time. When spraying foliar fertilizer, we should also pay attention to its pH, only by controlling its pH within a reasonable range, can the plants absorb the effective nutrients in the foliar fertilizer as soon as possible. When plants spray foliar fertilizer, they should also pay attention to its concentration and the time of spraying foliar fertilizer and the specific part of spraying foliar fertilizer, only by paying attention to these can foliar fertilizer play a good role, promote the rapid growth of plants, and also improve their fruiting rate.

Foliar fertilizer should be applied in small amounts and many times at the right time; Pay attention to wear gloves when using, do not eat them by mistake, use them according to the growth habits of crops, and be careful not to use them multiple times.

Choose the right concentration and also pay attention to the surrounding temperature. Be sure to use organic fertilizer, but also pay attention to the spraying cycle, it is best to spray once in the morning and evening.

Foliar fertilizer is popular because of its low dosage, good effect, fast effect, and easy to use! However, because the spraying concentration of foliar fertilizer is not mastered, fertilizer is produced, and fertilizer will also be produced during the use of foliar fertilizer if the amount and method of use are not mastered. The foliar spraying concentration of existing fertilizers is directly related to the spraying effect, and the solution concentration is too high, and it is easy to burn crop leaves after spraying.

The concentration of the solution is too low, which not only increases the workload, but also fails to meet the requirements of crop nutrient supplementation. Next, let's take a look at the spray concentrations and precautions for several commercial foliar fertilizers.

Volatile fertilizers (such as ammonia, ammonium carbonate, etc.) are sprayed with foliar fertilizer, which will cause damage to crops and burn leaves when exposed to high temperatures after spraying, so they cannot be used as foliar fertilizer. In addition, many micro-fertilizers can not be mixed with pesticides, acidic fertilizers and alkaline fertilizers can not be mixed, and fertilizer-fertilizer-medicine should be mixed in a targeted manner to play the role of "one spraying, multiple effects". Otherwise, it will be counterproductive.

Some farmers believe that the higher the concentration of foliar fertilizer solution, the better, which is not true. High nitrogen water dragon fertilizer must be less than 1%, potassium dihydrogen phosphate must also be less than 1%, more weight, trace element fertilizer including sugar alcohol calcium fertilizer, sugar alcohol calcium fertilizer, sugar alcohol zinc, chelate, copper, etc., must be below. In the case of high concentrations, not only can it not play a spraying role, but it will lead to dehydration and wilting of crop leaves, resulting in fertilizer loss, which is similar to pesticide damage and poisoning.

It is usually sprayed on the leaves and begins to spray the fertilizer liquid on both sides. Excessive fertilizer consumption can lead to rising costs and fertilizer waste. So everyone should pay special attention!

The effect of foliar fertilization is related to temperature, humidity, wind, etc. Foliar sprays are best done before 9 a.m. on cloudy days without wind or when humidity is high and evaporation is low. The most appropriate is to do it after 4 p.m.

After spraying, if it rains for 3 to 4 hours, it needs to be replenished. In addition, it is best not to use foliar fertilizers in these three situations: the flowering period of the crop; The flowers are delicate, and the use of foliar fertilizer is easy to be damaged by fertilizer.

The use of foliar fertilizer in the seedling stage can easily damage the seedlings. The use of foliar fertilizer in a high-temperature and high-intensity light machine throughout the day will affect the efficacy of the fertilizer.

Description of the spraying time of foliar fertilizer of "Spray Rich":

1. Depending on the degree of cultivated land pollution, choose to spray foliar fertilizer 1-2 times from the vigorous tillering period of rice and wheat to the heading stage; For example, spray 1 time at the jointing stage and 1 time at the heading stage.

2. Choose a sunny or cloudy day at 4 o'clock in the afternoon for foliar fertilizer spraying.

At this time, the light and temperature are suitable, which is conducive to the absorption of crops; If foliar fertilizer is sprayed during the scorching sun and high temperature period, the water evaporates quickly, resulting in an increase in the concentration of fertilizer solution, which cannot be absorbed by crops, and may even cause fertilizer damage. If it rains after 24 hours of spraying, it needs to be re-sprayed to ensure the effect. ）；

"Foliar fertilizer dosage description:

1. About 1 bottle each time, 500ml per bottle.

2. Artificial spraying of foliar fertilizer with water 50-100 times, UAV spraying with water 5-10 times of foliar spraying.

"Spray foliar fertilizer standard:

Spray until foliar dripping to ensure the effect of spraying.

Precautions for spraying foliar fertilizers:

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

2. Use a sprayer with better atomization effect for foliar spraying.

3. Do not use foliar fertilizer in rainy days, if it rains within 24 hours after spraying, it needs to be supplemented. (Rain will wash away the fertilizer, affecting fertility and effectiveness).

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

5. Foliar fertilizer should not be sprayed at the flowering stage, so as not to reduce the yield.

6. Keep out of reach of children and beware of accidental ingestion.

During the spraying of foliar fertilizer, wear protective equipment (gloves, masks, overalls and prevent eye damage) and wash with water within 10 minutes if you splash clothes or other objects.

Selenium-rich foliar fertilizer spraying is full of efficacy:

1. Improve the accumulation of selenium in the edible parts of crops and increase the selenium element of crops.

2. Greatly reduce the content of heavy metals such as cadmium and arsenic in crops. After application in moderately and mildly polluted soil, it can reduce cadmium uptake by 30%-40% and arsenic uptake by 20%-30%.

3. Effectively improve crop yield. Promote the photosynthesis of crops, enhance the development of root production and the effective use of nutrients.

4. Improve crop resistance to stress, disease and insect pests.

The number of mixed species should not be too much. In practice, don't put several kinds of foliar fertilizer together, and don't spray one kind of fertilizer today and another tomorrow. The application of foliar fertilizer has no cumulative effect, and spraying too much will even affect each other's effects.

Foliar fertilizers cannot be used as a substitute for chemical fertilizers. Although foliar fertilizer has a relatively obvious effect on increasing yield, and also has a certain role in promoting the improvement of crop quality and stress resistance, it can only play a comprehensive effect on the basis of high-yield supporting measures such as sufficient fertilizer and water, good control of diseases, insects and weeds. Therefore, foliar fertilizers and nitrogen, phosphorus and potassium fertilizers should be taken into account.

Master the application method, and the dosage should not be too large. When spraying, it should be sprayed evenly on crop leaves, young stems and ears and other parts of the crop before 10 a.m. or after 4 p.m. on a sunny day during the crop growth transition period (refer to the instruction manual). Arbitrarily increasing the dosage and concentration of application will not only cause waste, but even have a negative impact.

When spraying, it should be dissolved, used with the mix, and avoid strong light exposure or rain loss.

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.

Foliar fertilizer is generally sprayed at the seedling stage, the first flowering stage or the critical period of fertilizer in the middle and late stages of the crop to achieve appropriate results. Choose cloudy or sunny days in the morning and evening spraying effect is good, avoid scorching sun, large amount of leaf transpiration and cause poisoning, and should be sprayed in time after rain.

The spraying amount is 50-60 kg of fertilizer per mu, and the atomization degree of the sprayer should be increased as much as possible. Spray the whole plant, and the new leaves and the back of the leaf surface should not be sprayed. Generally, it is advisable to spray vegetables 2-4 times during the whole growing season.

The foliar topdressing effect of the spraying site is related to the speed of the spraying elements in the plant, the elements with strong mobility are nitrogen, 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 cannot be moved or have little mobility are sprayed on new leaves with good results.

The senescence of the root system of the crop means that its absorption capacity is weakened. If you choose root topdressing at this time, it will not be able to fully meet the needs of the crop. Foliar fertilization is undoubtedly a very good choice at this time.

Scientific foliar fertilization, in addition to timely replenishing the nutrients required by crops, can also prevent premature aging, inhibit diseases, and is beneficial to the increase of yield.

Crop deficiencies. Deficiencies are very common, and when we supplement the deficiencies, foliar fertilisers are significantly more effective than soil fertilisers. Foliar fertilization has the advantage of rapid absorption, which can alleviate the symptoms of nutrient deficiency in a more timely manner than soil fertilization supplementation.

The environment is harsh. Continuous rainfall, overly wet soil environment with untimely drainage, arid environment with water shortage, and soil pH imbalance are not beneficial to the growth and development of crops. At this time, if the crop wants to return to normal growth, the use of foliar fertilizer is a good solution.

Quickly replenish nutrients to meet developmental needs.

Complementary elements. Fertilizers such as phosphorus, iron, manganese, copper, and zinc fertilizers will be restricted by soil conditions if they are fertilized by the roots. The use of foliar fertilization can be effective quickly, not to mention less fertilizer, but also improve fertilizer efficiency, and safe and pollution-free.

When planting crops such as wheat, corn, soybeans, peanuts, fruit trees, etc., adequate fertilizer should be applied first so that nutrients can be absorbed during the growth of the crop. Foliar fertilizer, its role is in the middle of crop growth, root nutrition away from the roots of crops and do, acting on crop roots, and affect production, foliar fertilizer is the best way to solve this problem, it is liquid fertilizer sprayed directly on the leaves, under the action of light and tree respiration, directly convert foliar nutrition into the components required by plants, in order to achieve the nutrients directly delivered to the parts required by the plant, if the person is sick, the method of hanging needle will be directly transported to the lesion through the blood vessels, in order to achieve the effect of keratinization treatment.

Foliar fertilizer plays an important role in the cultivation process, and its biggest feature is the rapid absorption of nutrients, which are directly absorbed into the plant through the leaves. Of course, foliar fertilizers are highly targeted and can meet many of the special needs of crops. In the planting process, the yield and quality can be improved, and the fertilizer utilization rate can be improved.

All kinds of foliar fertilizers have their own characteristics and functions.

Today, we will mainly talk about the characteristics of the use of foliar fertilizers. Foliar fertilizer, fast nutrient absorption, good fertilizer efficiency. After the soil is fertilized, various elements in the soil are easily absorbed by the soil.

After the soil decomposes, nutrients are absorbed by the roots and transferred to the leaves through vascular bundles. The shipping speed is too slow. Foliar fertilizers spray nutrients directly onto the leaves.

Various nutrients can be quickly absorbed by the leaves, directly enter the plant, and participate in the metabolism of the plant and the synthesis of organic substances. The biggest feature of foliar fertilizer is that the fertilization time is relatively short, which can allow plants to absorb nutrients in the shortest time and ensure the growth of plants. During the planting process, both root fertilization and foliar fertilization are targeted.

Because soil fertilization takes a certain amount of time to transform nutrients before they can be absorbed by plants, it cannot alleviate the lack and demand of plants for nutrients in time. At this time, foliar fertilizer can provide nutrients and various trace elements according to the growth of the plant. Foliar sprays can be effective in improving the condition when plants are deficient in nutrients.

Foliar spraying, which has the irreplaceable advantage of root fertilization, can solve many special problems in plant growth.

It is conducive to promoting the nutrient absorption of crops, ensuring the amount of fertilizer, improving the yield of crops, and ensuring that the particles of the soil will not affect the growth of crops. According to the growth of crops, reasonable use should be carried out, the amount of foliar fertilizer should be controlled, and the use of foliar fertilizer should be paid attention to.

It can improve nutrients, better help crops grow, can have the effect of preventing insect pests, can prevent diseases, and can also improve the immunity of crops. The method of use is to mix foliar fertilizer and water in the same proportion, and then spray it on the surface of the crop through some instruments.