How to spray foliar fertilizer to facilitate absorption

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 a foliar fertilizer that directly applies the nutrients required by crops for the purpose of foliar absorption, which is called foliar fertilizer.

Supplement the deficiency of root fertilization: when the root fertilization of crops is inconvenient, such as in the late stage of crop growth, the root vitality declines, and the fertilizer absorption capacity is reduced; Or when the soil environment is unfavorable to crop growth, such as too much water, drought, soil too acidic, too alkaline, resulting in crop root absorption is blocked, and crops need to quickly resume growth, if the root application method can not meet the needs of crops in time, only to take foliar spraying, in order to quickly supplement nutrition, to meet the needs of crop growth and development.

Rapid nutrient supplementation: In the process of crop growth, crops have shown certain nutrient deficiencies, because it takes a certain amount of time to use soil fertilization to absorb nutrients by crops, and can not alleviate the symptoms of crop deficiency in time. At this time, foliar fertilization can quickly make nutrients enter the plant body through the leaves, solving the problem of nutrient deficiency.

Give full play to the fertilizer effect: some fertilizers such as phosphorus, iron, manganese, copper, zinc, etc., if applied as roots, are easy to be fixed by the soil and affect the application effect, while the use of foliar spray will not be limited by soil conditions. For example, some fruit trees and other deep-rooted crops have relatively little absorption of certain nutrients, and if the traditional fertilization method is used to apply it to the root absorption part, it can not give full play to its fertilizer effect, while foliar spraying can achieve better results.

Foliar fertilizer, just like hydrating cosmetics for women, is used for maintenance and rapid replenishment of collagen.

Foliar fertilizer is converted quickly and is easily absorbed, which fills the problem of insufficient bottom fertilizer during the topdressing period or the nutrient deficiency during late topdressing. The most common foliar fertilizers are potassium dihydrogen phosphate and boron fertilizers. There are many ways to use foliar fertilizer, which must be used according to the actual situation, and sometimes the use of it will not only fail to achieve the expected effect, but also play a role in the speed of not reaching.

For example, potassium dihydrogen phosphate is generally recommended to be used at the seedling stage and flowering and fruiting stage, and the use of seedling stage can strengthen seedlings, resist disease and lodging, and also resist low temperature and drought, and use in the flowering and fruiting period, which can promote the elongation of pistil stigma, improve pollination rate, promote fruit set, and then play a role in expanding young fruits.

Good foliar fertilizer can be sprayed from hair, to growing leaves, to fruiting, to maturity, but the dosage is different. 、

Different foliar fertilizers can be used for different times. As for boron fertilizer, it is generally not used at the seedling stage. Because it has no obvious effect, it can be said to be a waste, boron fertilizer is generally recommended to be used during the flowering period, in addition to the role of supplementing trace elements for crops, it can also play a role in ovary expansion, so that the grains are fuller, improve the fruit setting rate, and play a role in increasing yield and income.

Calcium and zinc spraying can reduce the occurrence of bitter pox and lobular disease, and spraying potassium dihydrogen phosphate can promote apple coloring and increase the sugar content of fruits.

Foliar sprays are faster, more effective, and safer than root absorption. In addition to the root system of fruit trees to absorb water and nutrients, the leaves can also absorb water and nutrients, so fruit trees also have an additional channel to absorb nutrients, and fruit trees can quickly absorb nutrients through the leaves to supplement the lack of tree bodies. Good foliar fertilizer not only makes the fruitful fruit trees more vigorous.

Also make weak trees. Diseased trees regain their vigor. So as to strengthen the tree, green leaves, and root protection, and now the domestic foliar fertilizer is very good.

When spraying foliar fertilizer, you must pay attention: in the morning or evening, sunny days, you can use foliar fertilizer, try to spray on the foliage, but you must not spray on rainy days, useless and wasteful!

Foliar fertilizer can provide various nutrients to plants, improve the nutritional status of plants, and provide nutrients to plants in the growing period. When spraying, we must grasp the concentration of spraying, and when spraying, we must spray on the back of the leaf surface, and the spraying time is generally about half a month.

First of all, it can ensure that each leaf has a corresponding cuticle, and in this way, it can also improve the yield, and at the same time ensure the quality, and then there will be no dead leaves and fallen leaves, you must pay attention to the concentration when spraying, and you must pay attention to the area, and then choose the right time and temperature.

Foliar fertilizers can eliminate some pests and also promote plant growth. When spraying, it must reach the appropriate concentration in order to 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, can not achieve the purpose of top dressing, spraying period is generally in the crop seedling stage, the first flowering period or the middle and late fertilizer critical period spraying foliar fertilizer, in order to achieve the appropriate effect, spraying dosage per mu spray 50-60 kg of fertilizer, should try to improve the atomization degree of the sprayer when applying.

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.

It can make the leaves grow more lush, and it can also be maintained longer under the sun, and there will be no wilting, so you must pay attention to it when spraying, put more water, and spray it more evenly, so that it can be better absorbed, and it can also better let the leaves grow.

a. Pay attention to the appropriate concentration of spraying. Since foliar fertilizer is sprayed directly on the surface of the upper part of the crop, it is important to know the concentration of foliar fertilizer. Different foliar fertilizers have different concentrations, different crop types spray concentrations, and different growth stages of the same crop.

Therefore, when carrying out foliar fertilizer spraying, it is flexible to grasp the specific situation, and prepare the appropriate concentration, the concentration is too low to have little effect, and the concentration is too high to damage the stems and leaves.

b Pay attention to the spraying site should be comprehensive. Many farmers only spray the fertilizer solution on the front of the leaves and ignore the back of the leaves, and the results are not ideal. Because foliar fertilizer is mainly absorbed by the leaves through the diffusion of stomata, and the distribution of stomata on the leaves, generally the back of the leaves is more than the front of the leaves, here, spraying foliar fertilizer, it is necessary to pay attention to the front and back of the leaves to spray, in order to expand the absorption surface, especially the dicots should pay more attention to the back of the spraying leaves.

c Be reasonable. There is an "antagonistic effect" between mixed spraying of phosphorus and zinc, so zinc fertilizer cannot be mixed with phosphate fertilizer, and zinc fertilizer and phosphate fertilizer are mixed to form zinc phosphate precipitates, thereby reducing the effectiveness of zinc. Phosphorus and molybdenum promote each other's crops, and a leguminous crop can be sprayed with fertilizer.

Copper fertilizer can not be mixed with potassium dihydrogen phosphate, zinc fertilizer and copper fertilizer can not be mixed with superphosphate, and generally various micro fertilizers can not be mixed with alkaline fertilizers. Note that alkaline and acidic fertilizers can not be mixed, and the solution is best to be used with it, and it is not suitable for long-term storage. The frequency of foliar fertilization should not be less than 2-3 times, with an interval of at least one week or more, and the amount of water is 50-60 kg mu.

d Pay attention to the spraying time. Great attention should be paid to the appropriate time of spraying, which is related to the effect of spraying. The effect of foliar fertilizer spraying is affected by factors such as high temperature, light, intensity, rain, etc., and the spraying should be selected on a sunny day without wind, in the morning and evening, and the best in the evening.

Drought, rainy days, strong winds and hot weather should not be carried out, and do not spray before rain to prevent fertilizer from being lost by rain and reduce fertilizer efficiency. 3-4 days after spraying is no rain, the wind speed is below 4 meters and seconds, and the temperature is 8-25, which requires uniform spraying and good atomization. If it rains 3 hours after spraying, it should be sprayed once when the oak is sunny, but the concentration should be appropriately reduced.

It should be noted that the spraying equipment should be cleaned frequently, so as not to affect the effect of spraying fertilizer due to pesticide residues.

<> when spraying foliar fertilizer, it is necessary to pay attention to the combination of soil fertilization. Foliar fertilizer acidity is suitable, and the general pH value is required to be 5-8. Foliar fertilizer has good solubility and can be used in combination.

Foliar fertilizer spraying time should be reasonable, the best time of day is in the morning and evening, when the light intensity is low, which is conducive to foliar absorption. If the surface spray catches up with the occurrence of crop diseases, etc., it can be mixed and matched with fungicides, which can improve the operation efficiency.

The leaf surface of <> plants generally has cuticle cracks, and these cracks are like the rhizome source on the leaves of plants, which can actively absorb foreign nutrients.

Foliar fertilizer spraying contraindications: it is forbidden to use it during the flowering period, it is forbidden to use it in the afternoon high temperature, and it is forbidden to use it when the seedlings are not slowing down.

1. It is forbidden to use it during the flowering period.

Crops can not be sprayed with foliar fertilizer during the flowering period, the flowering period is the stage of pollination and fruit hanging, and fertilization during this period is easy to burn flowers, which is not conducive to normal pollination and thus reduces yield.

2. It is forbidden to use it in high temperature in the afternoon.

Foliar fertilizer is a highly effective nutrient solution, and if foliar sprays are applied in hot weather, nutrient evaporation will cause nutrient evaporation, and nutrient concentrations will be reduced in the rainy season, both of which significantly reduce the utilization rate of foliar fertilizer.

3. The use of dust is prohibited during the seedling period.

In the crop seedling stage, most crops have just begun to germinate, or can not be sprayed with foliar fertilizer just after transplanting, because at this time the crop itself is not only fragile, not so adaptable to external conditions, generally spraying nutrient solution, it is easy to lead to the phenomenon of burning seedlings and leaves, which is not conducive to the normal growth of seedlings.

Introduction to foliar fertilizers

In the late growth stage of annual crops, root activity declines and fertilizer absorption capacity decreases. If you want to apply fertilizer to crops, the root application method cannot meet the needs of crops, so it is suitable to use foliar sprays. In the process of crop growth, when it has shown some nutrient deficiencies, if soil fertilization is used, it takes a certain amount of time for nutrients to be absorbed by crops, and cannot alleviate the symptoms of nutrient deficiency of crops in time.

At this time, if foliar fertilization is used, the advantages of fast absorption of foliar fertilizer can be fully utilized, so that nutrients can quickly enter the plant body through the leaves, and the problem of nutrient deficiency can be solved. For example, when vegetables lack some trace elements and the plants are short and the leaves are yellow and green, if the foliar fertilizer is sprayed to supplement these trace elements, these deficiency symptoms can be alleviated in time, and the effect is better than that of soil fertilizer and the utilization rate is high.

The above content refers to Encyclopedia - Foliar Fertilizer.