When is the best time for grape to supplement calcium?

Grapes have a great demand for calcium, which is similar to that of nitrogen fertilizer and potassium fertilizer. The most important thing to supplement calcium is the supplement of base fertilizer, the adjustment of pH value and soil activity, rather than finding the best time.

Therefore, calcium supplementation should pay attention to the following points.

1. The effect of adding organic fertilizer is better than simply adding calcium fertilizer. Base fertilizer must be strengthened, preferably based on base fertilizer, supplemented by flushing and spraying.

2. Acidic soil is best to adjust acid first and then supplement calcium.

3. Attention must be paid to the establishment and activity of microbial flora in soil.

Knowing this, we should pay attention to several nodes that need more calcium. Generally, I like four calcium supplements.

2. Before and after flowers

Nutrient storage before flowering is very important, especially calcium storage.

After flowering, grapes enter a period of rapid expansion, with rapid cell division and great demand for calcium. At this time, it is necessary to restrain the consumption of new shoots and let more calcium flow to the fruit.

Silicon-calcium fertilizer can be arranged before flowering, but I like high phosphorus fertilizer to promote flowering, so I have to advance it. Potassium calcium nitrate is sufficient in time after flowering. At the same time, pay attention to the soil pH value.

Before and after flowering, it should be noted that aging branches will affect the absorption of calcium by fruit particles. Nitrate nitrogen can delay aging very well, and potassium calcium nitrate is very affordable.

3. Late expansion-early coloring. At this time, calcium supplementation has a certain effect on cracking prevention during coloring period.

The specific time depends on the aging degree of the branches. Generally, phosphorus is added at the end of expansion and calcium is added at the beginning of coloring.

4. Calcium can be supplemented after harvest. Generally, base fertilizer can be applied before and after the autumnal equinox, and sufficient organic fertilizer and calcium fertilizer can be added to the base fertilizer.

It is best to apply quick-acting calcium fertilizer to late-maturing varieties after harvest to develop branches, and add enough calcium fertilizer when applying base fertilizer in spring.

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Calcium fertilizer plays an important role in the growth of grapes. Calcium participates in the synthesis of plant cells, and calcium deficiency can easily lead to grape cracking, sunburn and other diseases!

When is the best time to supplement calcium? During the grape growing period, calcium supplementation is best in two periods:

During the first period from germination to fruiting, grapes began to germinate and grow. By supplementing calcium fertilizer, promote the growth and development of root system and the growth of new growth points (new shoots and new leaves)!

In the second period, from the fruit-setting stage to the color-changing stage, calcium fertilizer should be sprayed several times during this period. Calcium supplementation can promote peel growth, avoid fruit cracking and gain weight, and also make leaves thicker, roots developed and disease resistance enhanced!

The choice of calcium fertilizer here is a suggestion for the use of calcium fertilizer. First, the choice of base fertilizer calcium, generally slow-release calcium fertilizer, common ingredients are calcium superphosphate, calcium magnesium phosphate and so on; Water-soluble calcium fertilizers such as calcium nitrate can be used in young fruit stage and hard core stage, and can be applied by irrigation or drip irrigation! Calcium fertilizer should be applied at the same time as foliar calcium fertilizer at the hard core stage and discoloration stage, and the effect is better. Calcium nitrate, calcium for fruits and vegetables and so on are recommended here!

0-2 weeks after withering and before harvest of 65438+ grape are the two peak periods of calcium fertilizer absorption. It is suggested to seize the critical period and make foliar calcium supplementation for 3-5 times. If the concentration of calcium nitrate is controlled between 0.25% and 0.5%, don't raise the concentration at will.

How to judge whether your grapes are calcium deficient?

When the grape is deficient in calcium, the young leaves will fade between the vein and the leaf edge, and then there will be pinhead-sized spots, and the tip and edge will curl downward, and fade to form withered spots after a few days.

Generally, grapes are about 10 days after flowering-14 days, which is the peak of calcium demand. Generally, calcium chelate or calcium amino acid can be supplemented at this time, and calcium-magnesium water-soluble fertilizer can also be sprayed on the leaves. In order to prevent calcium deficiency, it can be sprayed once every 7 days to 10 days, and it is best to spray it continuously for three times. Grape calcium supplementation can prevent fruit cracking and improve fruit hardness. There is a great demand for calcium during fruit expansion, and calcium fertilizer will gradually decrease. It is suggested that timely supplementation of spray chelated calcium can improve the hardness and toughness of pericarp, form a protective layer on epidermis and reduce rotten fruit.

In the process of supplementing calcium fertilizer, the absorption of calcium fertilizer by roots is also very important. Organic fertilizer should be added to the base fertilizer to improve the content of soil organic matter, which can promote the activity of calcium and reduce the fixation of new calcium fertilizer in soil. It is best to combine root absorption and foliar spraying to supplement calcium, which has the best effect.

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Grapes always absorb calcium nutrition from the new growth period to the fruit maturity period. Calcium supplementation can be done in the whole growth period (before fruit harvesting 15 days) or in the four golden periods of calcium supplementation (especially in the flower and fruit period). However, calcium supplementation should be based on "several times" and "soil application". It is suggested that calcium supplementation should be started before grape flowering, and foliar spraying should be emphasized.

In the choice of calcium fertilizer, the commonly used calcium fertilizers mainly include: calcium fertilizer with lime, shell powder, lime nitrogen, calcium superphosphate, calcium magnesium phosphate and so on. As base fertilizer, calcium ammonium nitrate, calcium nitrate, etc. As irrigation fertilizer, calcium sugar alcohol, calcium chelate, calcium amino acid and calcium nitrate are used as foliar fertilizer.

1, base fertilizer to supplement calcium

Generally speaking, the soil in the north is alkaline and the soil in the south is acidic because of the great difference between the north and the south. Therefore, when applying calcium fertilizer as base fertilizer in soil, it is suggested that calcium superphosphate, calcium sulfate and calcium nitrate should be used in northern area, and lime and calcium magnesium phosphate should be used in southern area.

Step 2 spray calcium supplementation

Calcium spraying can be combined with pest control. When spraying calcium supplements, it should be carried out flexibly according to soil nutrient status, calcium deficiency status of grapes and growth period. It can be sprayed 65,438+0 times before flowering, 7-65,438+05 days after flowering, young fruit expansion period and 65,438+00-65,438+05 days before fruit harvesting, or it can be sprayed 2-3 times at intervals after flowering.

When spraying calcium fertilizer, we should pay attention to: ① choose sunny and windless weather to spray; (2) Spraying the front and back of the leaves evenly, focusing on the inflorescence, ear and tender growth parts of the grapes; (3) Supplementing calcium and boron before flowering can improve the application effect of calcium fertilizer and boron fertilizer simultaneously; ④ Pay attention to the concentration of calcium fertilizer, but it should be excessive or too high. For example, the highest concentration of calcium nitrate should not exceed 0.5%, preferably between 0.25 and 0.5%.

3. flush calcium.

When washing and applying calcium, the roots of grapes can be thoroughly watered 30-40 days after withering, and it is best to use calcium fertilizer with high calcium content, so that calcium nutrition can be transported to the upper young fruits through transpiration of trees.

4. What are the precautions for grape calcium supplementation?

1. Calcium should be supplemented in acidic soil, and the pH value of the soil should be adjusted to 6.0-7.5 with quicklime and hydrated lime, and then calcium fertilizer should be supplemented; To supplement calcium in alkaline soil, fully decomposed organic fertilizer should be applied as far as possible, which can improve the water solubility and activity of calcium ions and reduce the loss of calcium ions caused by soil calcium fixation.

2. For gardens with serious soil problems, we should first try root-nourishing and root-protecting fertilizers such as sea elf biostimulants to activate the soil environment and improve the activity of grape roots to absorb nutrients.

3. Pay attention to control the dosage of nitrogen fertilizer, phosphate fertilizer and potash fertilizer when supplementing calcium. Calcium fertilizer cannot be mixed with potash fertilizer and phosphate fertilizer, otherwise calcium will be fixed by soil, and element antagonism or reaction precipitation will occur, which will reduce the calcium supplement effect.

4. Calcium supplementation should be based on base fertilizer, supplemented by foliar calcium supplementation. Not only can calcium fertilizer be sprayed without soil application, but also the best calcium supplement effect of grapes can be achieved.

Grapes need more calcium, second only to nitrogen and potassium. It is not an exaggeration to say that it is a large element in grapes.

You ask the effect of calcium on grapes? When is the best time for grape to supplement calcium? Here's a brief explanation.

The effects of calcium on grapes generally include three aspects, namely, participating in and regulating the growth and development of grapes, improving stress resistance and improving fruit quality.

Participate in and regulate the growth and development of grapes, such as maintaining the stability of cell membrane and osmotic pressure; Regulate cell mitosis of meristem such as root tip and stem tip; Improve the photosynthetic rate of leaves and accelerate the transfer and transportation of organic matter.

Enhance resilience: neutralize toxic substances and heavy metals produced during the metabolism of trees; Adjust the opening and closing of stomata to reduce the evaporation of leaves and improve the drought resistance of trees; Stabilize cell structure and reduce bacterial infection.

Improve fruit quality: improve fruit hardness and storability, and reduce the occurrence of physiological diseases such as fruit cracking and sunburn.

How do grapes supplement calcium? Grapes usually absorb calcium from the new shoot stage, which rises slightly from flowering stage to hard core stage, reaches a peak from the second fruit expansion stage to the color-changing stage, decreases at maturity stage, reaches a peak again after harvest, and then decreases.

Therefore, the key nodes of topdressing calcium fertilizer are before and after germination, before and after flowering, from fruit expansion to discoloration and after fruit picking.

Before and after germination: it is best to use calcium ammonium nitrate, and nitrogen can be supplemented by the way. If the bud is weak, it can be sprayed with sea elf biostimulant to strengthen the root system.

Before and after flowering: foliar application of calcium and boron fertilizer can improve the fruit setting rate.

Fruiting period: the critical period of calcium demand, top dressing+foliar spraying, preferably magnesium, such as spraying sugar alcohol to chelate Geshimei.

After fruit picking: apply more organic fertilizer to improve soil physical and chemical properties and increase organic matter content. Calcium fertilizer can be calcium magnesium phosphate fertilizer.

The demand for calcium in grape production in one year is very large, second only to the demand for potassium fertilizer. Potassium is an essential element for grapes from germination to flowering. Potassium can make grape root system developed, fruit trees flourish, disease resistance enhanced, fruit hardness high, fruit cracking reduced, and storage and transportation resistant. When is calcium supplementation good?

Generally, calcium should be supplemented when the grapes are big, and the effect of applying fertilizer outside the roots will be better. After foliar spraying, calcium will be absorbed by the fruit quickly, but it is not suitable for the fruit with root fertilization. Calcium sulfate can be applied as base fertilizer in autumn. Foliar calcium supplement includes calcium glycolate, fruit and vegetable calcium and calcium nitrate. Spraying once every 7- 10 days after Peng Da, the effect is good.

In agricultural planting, calcium is a medium and trace element with a large dosage, second only to nitrogen, phosphorus and potassium, so some people regard calcium as the "fourth largest element". In grape planting, calcium is also one of the key elements, which is related to the yield and quality of grapes, and its importance is self-evident.

Grapes need calcium. Calcium is a more necessary nutrient for grapes, especially in many soils, artificial fertilization is needed to supplement the demand for calcium for grapes. Generally speaking, the production of 1000kg grapes requires 6.7kg of nitrogen, 7.5kg of potassium, 4.0kg of calcium and 2. 1kg of phosphorus. It can be said that the demand for calcium in grapes is even greater than the demand for phosphorus, which shows the importance of calcium to grapes.

The role of calcium calcium plays several important roles in grape cultivation:

1. Promote the transfer and absorption of nutrients, enhance fruit expansion and increase fruit sweetness;

2. Increase the toughness of pericarp and reduce the occurrence of diseases such as rotten fruit, cracked fruit and sunburn;

3. Promote story coloring, increase fruit powder and improve the appearance of grape fruit;

4. Improve the stress resistance of grapes and reduce the occurrence of diseases and insect pests;

When to supplement calcium? Grape calcium supplement runs through the whole growth period, which is divided into three stages:

From germination to fruit-setting stage: the demand for calcium in this period accounts for about 40% of the whole year, which lays a good foundation for the flowering and fruit-setting of lianas;

From fruit setting stage to hard core stage: at this time, the amount of calcium application accounts for about 30% of the whole year, mainly to promote the development of pericarp, make leaves thick, roots developed, grow vigorously and have strong disease resistance.

From hard core stage to coloring stage: this is the peak period of grape calcium supplementation. Although the time is short, the demand is relatively large, mainly to increase the yield, which can make the peel thicker and less cracked; The fruit stalk will not fall off when it becomes thicker; Leaves are healthy, not too early.

Calcium supplement and organic fertilizer for grapes: Organic fertilizer contains many nutrients, which can improve soil conditions and adjust soil PH value.

Fertilizer application: trace elements application is the simplest and most direct method. Combined with the application of organic fertilizer in autumn, before the first root growth peak in March, calcium nitrate was 1.2 kg/tree and calcium superphosphate was 0.25 kg/tree.

Foliar spraying: In addition to washing, foliar spraying can also be used to supplement calcium in the early growth stage, young fruit expansion stage and before harvest 1 month, which is faster and more effective.

The important absorption period of calcium is before and after grape flowering.

Grapes need to absorb about 40% of the annual calcium requirement from germination to fruit-setting stage, and about 30% from fruit-setting stage to hard-core stage. Applying calcium fertilizer before flowering can promote the new shoots of grape root system to be strong and prepare for flowering. Applying calcium fertilizer after flowering can increase the hardness of pericarp, prevent fruit cracking, and enhance stress resistance and disease resistance. Most importantly, the accumulation of grape calcium is mainly in the early stage of fruit development, which accounts for about 890% of the total calcium in grape fruit.

The specific period is as follows: 1. Grapes should be supplemented with calcium before flowering.

Calcium ammonium nitrate can be used to supplement calcium and nitrogen. This fertilizer is neutral, suitable for grapes, and can be applied together with calcium during fruit setting. Foliar calcium fertilizer can supplement sugar alcohol calcium such as Gasmet and other calcium products. During this time, new shoots and fruits will compete for calcium, while fruits will often compete for leaves that cannot be won, so calcium should be supplemented.

2. The grapes should be supplemented with calcium after flowering.

Calcium plays an important role in grape growth and is the most absorbed element except nitrogen, phosphorus and potassium. We usually start to supplement calcium after the grapes bloom, so is it only absorbed during this period? Obviously not. In the process of grape growth, calcium is needed from germination to leaf spreading, flowering, fruit setting, expansion, discoloration and harvest, because calcium cannot be transferred in grapes. Therefore, the application of calcium fertilizer should be based on base fertilizer, supplemented by foliar calcium fertilizer.

3. The key point of grape calcium supplementation should be concentrated after fruit setting.

Grapes have a great demand for calcium. Most of the calcium in grapes is absorbed by the roots. Calcium is difficult to move in organs such as leaves and cannot be transferred to fruits. Calcium in fruits comes from xylem. From the end of the first physiological fruit drop of grapes, we can focus on fruit calcium supplementation. Fruits can be harvested from bagging to bagging, and the fruits without bagging can be supplemented roughly 4-5 times each growing season.

When is the best time for grape to supplement calcium?

Calcium is one of the essential nutrients for crop growth and plays an extremely important role in crop growth and development. Calcium generally exists in the cell wall in the form of pectin calcium in crops, which increases the toughness of the cell wall, prevents peel cracking and resists various diseases. It is especially important in melons and fruits, especially in berries such as grapes. In some periods, the demand for calcium fertilizer in grapes has far exceeded the demand for nitrogen fertilizer. At the same time, calcium fertilizer can promote root growth and enhance the functions of drought resistance, cold resistance and stress resistance of crops.

Generally 1000kg of fresh grapes need about 10 kg of pure calcium. During the whole growth period of grapes, from germination to leaf spreading, flowering, fruit hanging, swelling and coloring, calcium fertilizer is needed. The treatment of symptoms caused by trace elements such as calcium deficiency fertilizer is an irreversible process, that is to say, it is useless to supplement calcium fertilizer after calcium deficiency causes adverse symptoms. Therefore, calcium fertilizer should be supplemented in advance in the whole production process of grapes.

Calcium fertilizer is generally not easy to move in the soil, and it is easy to antagonize other elements, such as nitrogen, phosphorus and magnesium. According to these characteristics, calcium fertilizer can be supplemented in three times. Once before germination, once after flowering and once before fruit swelling can meet the demand for calcium fertilizer at the peak of grape stage. Generally, basic application of calcium fertilizer is the main method, supplemented by foliar spraying. In order to improve fruit quality and reduce fruit cracking, why do you need calcium supplementation after flowering? Generally, calcium is supplemented two weeks after flowering.

The most familiar point is the anti-cracking effect of calcium fertilizer. According to a large number of experimental data, calcium deficiency fertilizer can play a very good preventive role. More importantly, water management, fruit cracking mostly occurs after drought, or suddenly encounters heavy precipitation after drought. Fruit cracking is mainly a water management work. It is most suitable for the healthy growth of grapes to do a good job of drainage and control the environmental humidity of vineyards. Generally, the humidity in the fruiting period is controlled at 20%, so it is not easy to crack.

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Make up from beginning to end, and spray drip irrigation on leaves.