What is foliar fertilizer? Are leaves more important than roots? Can leaves also absorb fertilizers?

Yes, the scientific name is foliar fertilization. Use chemical fertilizer leaching solution, dilute to a certain concentration, and spray (generally 5/10,000) is appropriate, the concentration is too high and easy to burn the leaves.

Moreover, most chemical fertilizers can be sprayed with water according to the proportion of instructions can have a faster effect and better plant absorption, and it should be noted that the concentration should not be too high.

Plants absorb fertilizer not only from their roots, but also from their leaves! Experiments have been conducted by dissolving fertilizer with radioactive elements in water and applying a brush to the leaves of plants.

A few days later, amazingly, radioactive elements were also found in the roots of the plant.

There are two special tissues on the surface of the leaves, one called the stomata and the other called the cuticle. The fertilizer sprinkled on the leaves enters through the "door" of the stomata, and when they get inside, they move between the cells. Because the leaves of the plant have this special function, in the last 10 years, the foliar fertilization method has been widely used in many crops, and it has been given a name, called "root topdressing".

There are many advantages to topdressing outside the roots of plants. For example, when a plant is sick due to a lack of an element, it can be prescribed. Like the lobular disease on fruit trees, it is caused by zinc deficiency, as long as you spray some zinc, you can ** this disease; Some alkaline soils are easy to fix certain elements, so they are not easy to be used by plants, and topdressing outside the roots can make up for this defect to a certain extent.

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.

The role of foliar fertilizer: to supplement the lack of root fertilization, quickly supplement nutrients, give full play to the fertilizer effect, economical and cost-effective, and reduce the pollution of soil.

The organ that absorbs nutrients and water in plants is still dominated by the root system, and the healthy growth of the root system can lead to the healthy growth of plants.

However, the current fertilizer is no longer a traditional large chemical fertilizer, there are many water-soluble fertilizer manufacturers, as well as foliar spraying of water-soluble fertilizer, such as fertile leaf foliar fertilizer, which can promote the absorption of nutrients by leaves and provide nutrients for plants, so leaves can absorb nutrients.

Can leaves also absorb foliar fertilizer?

The leaves of crops can directly absorb the nutrients in the fertilizer into the body, so that these nutrients can quickly participate in the metabolism of crops and play a role, promote the healthy growth of crops, increase yield and income.

Foliar fertilizer is absorbed more quickly and effectively than soil fertilization, because foliar absorption is much faster than that of roots, which is like the difference between taking medicine for a cold and taking a drip.

It's just some medium and trace amounts, and you can match it yourself. It can absorb part of it through photosynthesis.

Introduction to foliar fertilizers.

Foliar fertilizer refers to the fertilizer that applies the nutrients required by crops directly to the foliar surface to make up for the lack of nutrients absorbed by the plant roots.

Foliar fertilizer characteristics.

Merit. First, foliar fertilizer is absorbed quickly. Various nutrients enter the plant directly from the leaves and can be quickly absorbed by the plant; Second, the effect of foliar fertilizer is strong.

Foliar fertilizer is easy to be absorbed by plants, which can quickly alleviate crop fertilizer deficiency, promote the progress of various physiological processes in plants, and improve plant quality. Third, the amount of foliar fertilizer is small and the cost is low. Foliar fertilizer is sprayed directly on the foliage, which is more material-saving than root fertilizer.

Shortcoming. First, the leaves with thick horns have low nutrient absorption permeability and low absorption; Second, foliar fertilizer is easy to drip from the leaves, and the nutrients sprayed are easy to be lost by rainwater; Third, the spray dries quickly on the leaf surface, which affects the absorption of plants; Fourth, nutrients such as calcium are difficult to transfer from the absorption site to other sites; Fifth, the nutrients provided by foliar fertilizers cannot meet all the needs of plant growth; 6. Improper use of foliar fertilizer before splitting is easy to cause foliar burns of plants; The effect time of seven-leaf fertilizer is short, and it needs to be sprayed many times, which is time-consuming and laborious.

Precautions for the use of foliar fertilizer.

Foliar fertilizer should be mainly applied to the roots, and the appropriate spraying concentration, spraying method, spraying time and spraying time should be selected to give full play to the role of foliar fertilizer.

On salinized soils, soil fertilization may increase the concentration of soil solution and aggravate soil salinization.

1. Supplement the lack of root fertilization

When the root fertilization of crops is inconvenient, for example, in the later stage of crop growth, the root vitality declines and the fertilizer absorption ability decreases; Or when the soil dust residual 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 by taking foliar spraying, can quickly supplement nutrients, meet the needs of crop growth and development.

2. Quickly replenish nutrition

In the process of crop growth, crops have shown some nutrient deficiencies, because the use of soil fertilization requires a certain amount of time for nutrients to be absorbed by crops, can not alleviate the symptoms of nutrient 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.

3. 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, affecting the application effect, while the use of foliar sprays 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.

4. Economical

Various trace elements are essential nutrients in the process of crop growth and development, but the application amount is very small, such as molybdenum fertilizer, the application rate per mu is only a few tens of grams, if the root application method is not easy to apply evenly. Only foliar sprays can be cost-effective.

According to the research calculation, the utilization rate of boron fertilizer sprayed on the foliar surface of general crops is twice that of basal application. From the perspective of economic benefits, foliar sprays are more cost-effective than root sprays.

5. Reduce soil pollution

The application of nitrogen fertilizer to the soil in large quantities can easily cause the accumulation of nitrate in groundwater and vegetables, which is harmful to human health.

About 75% of the nitrate absorbed by humans comes from vegetables, and if the amount of soil fertilizer is appropriately reduced by foliar fertilization, the nitrate content in plants and the residual mineral nitrogen in the soil can be reduced.

On salinized soils, soil fertilization may increase the concentration of soil solution and aggravate soil salinization. Foliar fertilization measures not only save the amount of fertilizer, but also reduce the pollution of soil and water sources, which is an effective fertilization technology that kills two birds with one stone.

The role of foliar fertilizer is to make the leaves grow more full, mainly for some vegetable crops. The function of root fertilizer is to make the rhizome Qixiangdou grow more developed, mainly using some fruit trees.

Flour fertilizer can be used together with root fertilizer, but the concentration should be controlled, and the frequency of application should also be appropriate, so as not to cause root burning. Foliar fertilizer, also known as plant nutrient and plant compound liquid fertilizer, is a class of nutrients made by the concentration of nitrogen, phosphorus, potassium, iron, zinc, manganese, boron, copper and other elements.

The root system of crops is the main functional organ that absorbs nutrients. Sixteen medium, large, medium and trace elements required for crop growth can be absorbed by Xunyan Zheng. Foliar fertilizer was mainly composed of trace elements, and jujube was supplemented by a small amount of medium and large amounts of Yuanmu Songsin, but the absorption was limited.

And the best effect of foliar topdressing is to supplement trace elements.

Reason 1: Foliar fertilizer composition.

Foliar fertilizer components are mainly medium and trace elements, some of which contain a large number of elements, which play a role in the middle and late stages of crop growth, that is, the fruiting maturity period, and can be quickly absorbed and transformed through the foliar surface to achieve the purpose of not lacking nutrients and increasing yields, and the root fertilization is mainly based on base fertilizer, and a large number of elements such as urea, ammonium carbonate, compound fertilizer, etc., are mostly helpful to the early branches and leaves, flowering and other growth of crops.

Reason 2: Short fertilizer effect.

Foliar fertilizer efficiency, such as high-end molar foliar fertilizer, is about 15-30 days, and the bottom fertilizer can play a role in the whole crop growth period.

Reason 3: Fertilization method.

Foliar fertilizer is the use of foliar spraying for top dressing, suitable for a large area of planting areas, saving time and effort, root fertilization is soil fertilization is inconvenient and labor-intensive.

Why can't foliar top dressing replace root top dressing when fertilizing orchids? After reading it, I understand.

Yes. - Chosen by the questioner 1 year ago.

Plants absorb fertilizer not only from their roots, but also from their leaves!

Someone once did such an experiment: dissolved fertilizer with radioactive elements in water, and then applied a brush to the leaves of plants, and after a few days, it was surprising that radioactive elements were also found in the roots of plants.

In fact, the fact that plants use their leaves to absorb fertilizer has been noticed by some scientists more than 100 years ago, but it is only after the advent of radioactive isotopes in modern times that people have a clearer understanding of it.

It turns out that the leaf absorbs fertilizer differently than the root, and it has its own unique set of abilities. As you know, there are two special tissues on the surface of the leaf, one called the stomata and the other called the cuticle. The fertilizer sprinkled on the leaves enters through the "door" of the stomata, and when they get inside, they move between the cells.

Because the leaves of the plant have this special function, in the last ten years, the method of foliar fertilization has been widely used in many crops, and it has been given a name, called "root topdressing".

There are many advantages to topdressing outside the roots of plants. For example; When a plant is sick due to a lack of an element, it is time to prescribe the right medicine. Like the lobular disease on fruit trees, it is caused by zinc deficiency, as long as you spray some zinc, this disease can be **; Some alkaline soils are easy to fix certain elements, so they are not easy to be used by plants, and topdressing outside the roots can make up for this defect to a certain extent.

In addition, the amount of fertilizer used in spraying fertilizer is saved, some concentrations are only 1 3, and some are even less than 0 1.

Why does applying such a little fertilizer have obvious effects? This is because some essential elements, such as boron, manganese, magnesium, zinc, iron, etc., are not required by the plant itself, and a small amount of ** can meet the requirements; Some elements, such as nitrogen, phosphorus, and potassium, are required in large quantities by plants. Extra-root topdressing can not only ** these elements, but more importantly, after spraying, it can also strengthen the ability of leaves to produce nutrients and increase the accumulation of substances in the body.

However, although root topdressing has many benefits, it cannot completely replace root fertilization, because the amount of fertilizer absorbed by the leaves is much less than that of the roots, and it can only be used as an auxiliary fertilization method. At the same time, when applying extra-root topdressing, the selection, concentration, time and method of salts are also very important, improper use, not only the effect is not good, sometimes it may bring harm, which must be paid attention to.

Yes, very good green fertilizer, no pollution.

To make organic fertilizer, cattle people use waste vegetable leaves to make it, which is not only environmentally friendly but also healthy.

Can foliar fertiliser replace root fertilization? Many flower friends do it wrong, so the moon season is not good.

In salinized soils, soil fertilizer is likely to increase the concentration of soil substances and aggravate soil salinization.

1. Fill the root topdressing is not enough.

When it is inconvenient to fertilize the roots of crops, such as in the middle and late stages of crop growth and development, the charm of rhizomes declines, and the ability to absorb fertilizer decreases. Or when the soil natural environment is poor for crop growth and development, such as too much water, drought, soil acidity, too alkaline, resulting in crop rhizome digestion and absorption blocked, and crops must quickly resume normal growth and development, if the root application method can not immediately achieve the crop must, only the use of leaf spray fertilizer, can quickly supplement vitamins, to achieve the need for crop growth and development.

2. Quickly replenish vitamins.

In the process of crop growth and development, crops have shown some symptoms of inattention of trace elements, because the selection of soil fertilizer must take a certain amount of time for nutrients to be digested and absorbed by crops, and can not immediately alleviate the symptoms of crop deficiency. At this time, foliar fertilization can make nutrients quickly enter the plant cells according to the foliar surface and deal with the problem of nutrient deficiency.

3. Make full use of fertility.

Some chemical fertilizers such as phosphorus, iron, manganese, copper, zinc fertilizer, etc., if applied as roots, are easy to be fixed by the soil, which endangers the actual effect of use, and the selection of leaf spraying fertilizer is not easy to be limited by soil standards. For example, some fruit trees and other deep root crops have a relatively small intake of some trace elements, if the traditional fertilizer application method cannot be applied to the rhizome digestion and absorption position, and can not exert its fertility, while leaf fertilizer spraying can obtain good practical results.

4. Appropriate economic development.

A variety of nutrients are indispensable nutrients in the growth and development of crops, but the application amount is very small, such as molybdenum fertilizer, the application amount of 1 mu is only a few tens of grams, if the root application method is not easy to apply evenly. Only by using leaf spraying fertilizer can we achieve reasonable economic development. According to the analysis and calculation, the use rate of boron fertilizer on the leaves of general crops is times that of basal application.

From the perspective of economic benefits, leaf fertilizer spraying is more suitable than root application.

5. Alleviate environmental pollution to the soil.

The use of base fertilizer for soil is very easy to lead to the accumulation of phosphate in surface water and vegetables and fruits, which has adverse effects on health. About 75% of the phosphate digested and absorbed by people is in vegetables and fruits, if the method of foliar fertilization is used to moderately reduce the amount of soil fertilizer, it can reduce the phosphate composition in the body of green plants and the residual mineral nitrogen in the soil.

In salinized soils, soil fertilizer is likely to increase the concentration of soil substances and aggravate soil salinization. The use of foliar fertilization countermeasures not only reduces the amount of fertilizer application, but also reduces the environmental pollution of soil and water resources, which is a reasonable fertilizer technology that kills two birds with one stone.