When is the foliar fertilizer effective, and how often is the foliar fertilizer hit

2. Dosage per mu: about 1 bottle each time, 50-100 times of water sprayed manually, and 5-10 times of water sprayed by drones for foliar spraying. The principle of leaf dripping.

3. Field management: the same as ordinary field management.

Notes:1. When using, it should be prepared and used, and the foliar fertilizer and foliar inhibitor 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 mix spraying with pesticides or peculiar 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.

Foliar fertilizer is more suitable to be sprayed once every 10 days.

Foliar fertilizers can be mixed with neutral or slightly acidic pesticides (fungicides or insecticides).

It usually happens when the buds are just emerging. At this time, spraying foliar fertilizer helps the growth of plants and can increase yields, and the effect is very obvious.

When the leaves are more vigorous, but there are dead branches and rotten leaves, and then there are rotten roots or rotten roots.

I think it's best to apply foliar fertilizer after the fruit grows, because this is the time when the foliar fertilizer is the most efficient for plants to absorb.

Summary. Kiss. The effective temperature range of foliar fertilizer is generally 10 -30.

Foliar fertilizers work best in this temperature range. If the temperature is too low, the absorption capacity of the plant will be affected, and the foliar fertilizer will also be difficult to absorb; If the temperature is too high, it is easy to cause problems such as leaf burns. Therefore, when using foliar fertilizer, it is necessary to pay attention to the change in temperature and choose to apply fertilizer when the temperature is suitable.

At the same time, it is also necessary to select the appropriate foliar fertilizer type and amount according to different varieties and growth periods to achieve the best effect.

Kiss. The modified temperature range of foliar fertilizer is generally 10 -30. Foliar fertilizers work best in this temperature range.

If the temperature is too low, the absorption capacity of the plant will be affected, and the foliar fertilizer will also be difficult to absorb; If the temperature is too high, it is easy to cause problems such as leaf burns. Therefore, when using foliar fertilizer, it is necessary to pay attention to the change in temperature and choose to apply fertilizer when the temperature is suitable. At the same time, it is also necessary to choose and discuss the appropriate foliar fertilizer type and dosage according to different varieties and growth periods to achieve the optimal effect of nucleus solution.

Now the weather temperature is the lowest temperature is 3 degrees. The maximum temperature is 17 degrees. Is this temperature suitable for playing?

Kiss. The applicable temperature range of foliar fertilizer is generally between 5-25, and too high or too low temperature will affect the absorption source effect of foliar fertilizer. Depending on the weather conditions you provide, the minimum temperature is 3 degrees, which is significantly lower due to the range of application, and it is not recommended to use foliar fertilizer at this time.

The maximum temperature is 17 degrees, which is within the applicable range, but the temperature difference between day and night is large, and the humidity is also low, which may affect the absorption of foliar fertilizer and the nutrient uptake of plants. It is recommended to use foliar fertilizer when the temperature is stable at about 10-20 and the humidity is high in late twigding weather, and the effect will be better.

Foliar fertilizer is generally better applied after 4 p.m.

The amount of foliar fertilizer absorbed by crops is very related to the residence time of fertilizer on the leaves, generally after 4 o'clock in the afternoon, the light intensity will be relatively weak, at this time spraying foliar fertilizer can avoid the fertilizer being evaporated, so that the leaves of the crop have enough time to absorb nutrients.

Foliar fertilizer is a fertilizer that can be used directly on the leaves, which can compensate for the lack of nutrient absorption by the roots, but it cannot replace the fertilizer in the soil. Foliar fertilizer spraying can quickly replenish nutrients and give full play to the effects of fertilizer. If you fertilize the root system, it is easy to be fixed by the soil, and it will also affect the effect of the fertilizer, and foliar fertilizer can reduce the pollution of the soil.

Precautions for plant fertilization

There are many types of fertilizers, including nitrogen fertilizers and phosphate fertilizers, which correspond to long leaves and flowering, respectively. Among them, nitrogen fertilizer is a very single fertilizer, which only contains nitrogen, and must be used reasonably for our flower use. Because after using fast-acting nitrogen fertilizer, it does not get phosphorus or potassium, and the root system will be weakened.

Although he will quickly grow branches and leaves after using Zheng Manuscript once or twice, after using it more times, it will cause its root system to weaken, and the leaves will gradually grow smaller and smaller, and finally directly stiffen the seedlings or seriously fall off the leaves. Remember not to use raw fertilizer, including sheep dung and cow dung and the like, do not use it if it is not fermented, and then use it after fermentation, otherwise it will be difficult to save it after burning the roots.

Foliar fertilizer at 10 a.m. is effective.

In order to achieve the best effect of foliar fertilizer, the general spraying time is controlled after 10 am or after 3 pm, especially at noon. The reason is that the temperature at noon is relatively high, the water on the leaf surface evaporates relatively quickly, and the liquid fertilizer stays on the leaf surface for a short time, which cannot achieve the effect of absorption. In addition, the sunlight is emphasized at noon, and the water droplets will have the effect of a magnifying glass.

Foliar fertilizer is sprayed directly from the top to the bottom, which is a measure. In this way, the spraying of leaf noise is basically on the front of the leaves, and the back is very little. It is recommended to spray the underside of the leaves as well.

Foliar fertilizer is also called foliar fertilizer topdressing, and it can be seen that foliar fertilizer topdressing is no different from traditional soil topdressing. That is, what fertilizer the crop lacks, choose what fertilizer to apply topdressing, this principle will not change.

Precautions for the use of foliar fertilizer:

1. The fertilizer variety should be appropriate.

Foliar fertilizer selection should be targeted. For example, in the case of insufficient basal fertilizer application, foliar fertilizer containing nitrogen, phosphorus and potassium can be selected. When the basal fertilizer is applied sufficiently, the micronutrient foliar fertilizer can be used.

Cotton bud and boll drop are related to boron nutrient insufficiency, and boron fertilizer can be sprayed 2-3 times on the foliar surface of cotton at the budding stage, and the effect of bud and boll preservation is better.

2. The timing of spraying should be appropriate.

The effect of foliar fertilization is related to the length of time the solution wets the leaves, and the longer the wetting time, the better. In general, it is advisable to keep the leaves moist for 30-60 minutes. Foliar fertilizer should not be sprayed at noon on sunny days and windy weather.

3. The spraying period should be appropriate.

Spray foliar fertilizer according to the different growth and development stages of crops. Specifically, foliar fertilizer is suitable for spraying foliar fertilizer from seedling stage to grain filling stage of rice, wheat and other crops; Foliar fertilizer can also be sprayed on melon and fruit crops from the early flowering stage to the enlargement of young fruits.

Nitrogen, phosphorus and potassium fertilizers are mostly sprayed in the middle of crop growth, and the spraying solution is 75-100 kg per mu; Trace elements are sprayed at the seedling stage and the late flowering stage, and the solution is sprayed with 50-75 kg per mu. The former is sprayed 1-2 times, and the latter is 2-3 times, with an interval of 7-10 days between each spraying.

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.

<> foliar fertilizer can generally be sprayed during the critical period of nutrient efficiency during the crop growth period. When spraying foliar fertilizer, it is necessary to pay attention to choosing a windless sunny day before 9 a.m. or after 6 p.m. in the front of the rock for jujube speed, and can not be sprayed at noon on hot weather, before rainy days, and after spraying pesticides.