What fertilizer should I use for my grapes?

The grapes are large and small because the fruit is not swelled when it is expanded. The largest and smallest grapes need to be removed, otherwise the overall ripeness will be affected.

Phosphate and potassium supplementation is also required. Promotes larger and sweeter grapes.

The use of fertilizer to make grapes large: before flowering and during the expansion of young fruits, nitrogen fertilizer is the main fertilizer, supplemented by phosphorus and potassium fertilizer. During the fruit coloring period, phosphorus and potassium fertilizers are the main fertilizers, and a small amount of nitrogen fertilizers are added.

The period when the maximum demand for nitrogen fertilizer is from budding and leaf development to around the flowering stage to the swelling stage of young fruits, and the period when the maximum demand for phosphate fertilizer is from the swelling period of young fruits to the coloring and ripening stage of berries. The period when potassium fertilizer demand is the largest is from the young fruit expansion stage to the berry coloring and ripening stage, and the potassium absorption increases significantly during this process.

During the expansion of the grapes, the suitable temperature is 20-30 degrees, and the large temperature difference between day and night is conducive to the coloring of the grapes and the accumulation of sugar. Grapes are light-loving plants and need to be kept in the light for about 7-9 hours a day. If the sun is too strong, you need to bag to shade the fruit.

During the berry season, the demand for water is high. At the time of maturity, the water should not be too much, and it is okay to keep the soil moist that the nucleus is coarse.

Introduction to grapes

Grapes are found all over the world. Its winter buds generally germinate and sprout new shoots after the temperature reaches 10 in spring. During the growing season, mild climate, abundant sunshine, and long-term dryness are required; In places where the temperature is high and the temperature difference between day and night is large, fruits with more nutrients, good coloring and high sugar content can be produced; And it has strong adaptability to the soil, and most of the soil can be planted.

Grapes can be used to make various types of wine, and can also be processed into raisins, grape juice, etc.; The processed skin residue can be used to distill alcohol and tartaric acid; The seeds in the fruit can be extracted from high-grade edible oils and lubricating oils. Cultivated vines can make effective use of various terrains and soils, such as hillsides and sand barrens, and can be developed into a production base.

The above content refers to Encyclopedia - Grape (Vitis vinifera).

Encyclopedia - Grapevine (Vitis vinifera).

Fertilization techniques and precautions for grapes at various stages.

1. Embryonic stage.

Generally, germination fertilizer is applied once before germination to promote shoot growth and shoot germination. Nitrogen fertilizer was mainly applied at the germination stage, which could effectively promote the rapid growth of new shoots and leaves.

2. Flowering period.

During the flowering period, the application of flush fertilization is mainly phosphate fertilizer (phosphorus is mainly to promote the differentiation of flower buds), and the germination fertilizer should be applied before flowering, if you choose fast-acting fertilizer, you can use it 3 to 5 days in advance, and compound fertilizer 15 to 20 days in advance.

3. Young fruit stage.

Potassium fertilizer should be used as the main fertilizer to promote the rapid expansion of young grapes and prevent the occurrence of various potassium deficiency symptoms. Potassium can promote the ripening of young grapes, increase the sugar content of the grapes, reduce acidity, improve the taste and redness of grapes.

4. Swelling period.

The potassium requirement in the swelling stage is more than that in the young fruit stage, which is the highest peak of the grape fertilizer requirement in a year, and the potassium fertilizer is sufficient, which can effectively improve the expansion rate of grape fruits, promote fruit coloring, sweetening, and prevent grain loss.

5. Coloring and maturity period.

If the color of the type is not good at this time, you can apply potassium fertilizer again, if the root fertilization slag is sufficient, you can properly apply some potassium fertilizer products to promote coloring and sugar.

6. Post-harvest.

After harvesting, in order to recover quickly from injuries and survive the winter safely, without affecting the next year's product, some nitrogen fertilizer (to promote injury recovery) and phosphate fertilizer (to promote root development) can be rushed. It can be applied up to 1 month after harvest, the earlier the better.

7. Precautions.

When planting grapes, usually after the bud starts, you can supplement the fertilizer or water-soluble fertilizer in time, to ensure the nutrients required for grape growth in time, promote seedlings, and promote the expansion of young fruits.

Causes of grape size:

1. Variety reasons.

Individual varieties such as Jufeng, Fujiminoru, Jingya and other European and American varieties are born with poor pollination, which affects the formation of seeds, and the seeds are closely related to the size of the fruit, so the varieties with poor pollination are prone to large and small grains.

2. The tree is too vigorous.

The large and small grains caused by vigorous growth are characterized by thick branches, long nodes, some also show distorted inflorescences, abnormal flower bud development, etc., large grains have seeds, especially large, small grains are very small, and there are few fruit sets. The size of the grain caused by the vigorous growth is related to the excessive growth of the branch in the previous year, and the vigorous growth of the previous year causes poor differentiation of flower buds, and the branch of the current year's vigorous growth will also appear in the next year.

3. The tree is too weak.

Plants that are too weak will have poor vegetative growth in the early stage, resulting in insufficient reproductive growth in the later stage** to expand the fruit grains, and will also lead to the phenomenon of large and small grains. Studies have shown that if the fruit branches are too thick and too fine, they will cause large and small grains.

4. Unbalanced nutrition.

Most of the size of the grain phenomenon is formed from the flowering period, grape flowering needs a lot of energy, energy is provided by phosphorus, at the same time boron, zinc, calcium and many other trace elements demand more, only a variety of nutrients are balanced and coordinated, grape flowering is relatively complete, pollen, so that the branches can ensure a good fruit setting rate, so as to reduce the size of the grain. Conversely, any of the above nutrient deficiencies will lead to the phenomenon of large and small grains in the grapes.

5. Bad weather during flowering.

Pollination will be affected by low temperatures, rainy weather, or high temperatures and dry weather during the flowering period.

Prevention and control plan: 1. Before flowering, control water and fertilizer for grapes that grow too vigorously, and supplement fertilizer and water for grapes that grow too weakly;

2. Use 10 kg of Shenyou lotus leaf carbon enzyme barrel fertilizer growth type + 2 kg of "Shenyou" calcium, magnesium, boron, iron and zinc, use it once, flush application or drip irrigation. Foliar sprays are applied using "Bicai" security control, diluted 300 times, used twice, and used once at an interval of 7-10. In order to promote fruit expansion, improve the sugar content of fruit, increase the thickness and gloss of fruit powder, improve quality, and prolong the picking period.

What is the reason for the large and small grains of grapes planted? The size of the grape grains, where the large grains refer to the normal size of the head grains, and the small grains refer to the grains that are smaller than the normal size, which is the main reason for the occurrence of grape grain size. Since the Kyoho UVA tree is more than three years old, genetic transformation or degradation occurs on the tree, and the size of the UVA particles also changes with the age of the tree, almost as small as the improper USO of the soybean size regulator.

In the past, the sustained temperature before flowering was very low, and the ears did not open in time, and there were almost no seeds to be planted.

Now, this is happening in many grapes. In general, the size of Kyohio, Victorian peanut or soybean seeds, usually without seeds in small seeds, they are colored in the first place. If the UVA has large particles and small particles, their base values will be very low.

There are long-term and difficult problems with ROSA and Beijing Asia UVA. Most domestic vine plants have uneven fruit size after fixing the fruit. Fruit producers often find large and small UVA phenomena that not only affect yields, but also seriously affect grape quality, causing economic losses and seriously affecting yields, grape quality and quality.

Fruit Raw Song Pure Producer Sales** and Yield. Causes of physiological pollination of grape varieties such as UVA and Tengren: congenital genetic defects and resistance dysplasia, such as UVA of the Julang variety.

In the later stage, the number of fruits was small, the distribution of fruits was uneven, the particle size was serious, and the number of grains per ear was quite different. What is a grape-sized grain? The so-called large grains refer to ordinary grains, and small grains refer to grains that are smaller than ordinary grains, such as peanuts or soybeans.

There are usually no seeds in the small particles, they are colored in the first place.

If the UVA has large particles and small particles, they are specific properties. The main causes of poor fruit fixation of UVA Josep 9312; It is related to the flowering and fruiting characteristics of the grapes. UVA is prone to berry size and grain size issues during grape flowering.

In climates with persistent high temperatures or cloudy and rainy weather during the flowering period. In addition, if the planted UVA fruit is not uniform in size, the management of water and fertilizer is ineffective. The first few flowers and fruits were not in place, water and fertilizer management was inadequate, and there was too much water, resulting in grapes with different grain sizes.

Pre-bud fertilizer In the pre-germination soil, fast-available nitrogen fertilizer is the main fertilizer. A small amount of compound fertilizer can be applied on the basis of the conditions on the basis of the draft. At this time, fertilization is beneficial to promote the growth of buds.

This topdressing is particularly important. For vigorous trees, you can choose not to fertilize. Pre-flowering fertilizer is used for 1 week before flowering, and is generally fast-acting, mainly nitrogen fertilizer with phosphate fertilizer and potassium fertilizer.

Vigorous wood can reduce the use of nitrogen fertilizers. Varieties that have a strong tendency to grow and are prone to falling flowers, such as Kyoho, can grow well even without top dressing. Fruit-boosting fertilizer quickly becomes the hypertrophic stage in young bright fruits.

The fruit size is similar to that of a pea. At this time, available nitrogen and phosphate fertilizers are needed mainly with potassium fertilizers for fertilization, which can increase the number of fruits. Promote the growth of flower buds, not without fertilization.

Coloring fertilizer It is important to carry out topdressing after the berries enter the veraison period, that is, when the berries of the colored varieties begin to color and the berries of the colorless varieties become soft. Top dressing is mainly based on potassium fertilizer combined with phosphorus and nitrogen fertilizer.

In general, there are two situations that lead to this, 1, genes 2, malnutrition, and there are two kinds of pesticides in general, one is to remove insects, and the other is to promote growth and use pesticides to assist him to grow, but for what you said, it may not have much effect, I hope to adopt! Thank you!

Summary. Hello dear, when the grape grains are too small, you can consider using the following fertilizers to improve the development and quality of the fruit:1

Phosphate fertilizers: Phosphorus is a key nutrient that promotes fruit development and increases fruit size. You can choose phosphate fertilizers such as diammonium phosphate and monoammonium phosphate and apply them according to the instructions on the package.

2.Potassium: Potassium is an important element in improving the sugar, color and taste of fruits.

Potash fertilizers such as potassium chloride, potassium sulfate, etc., can be used and applied according to the instructions on the package. 3.Organic fertilizer:

Organic fertilizer can improve soil texture and maintain soil moisture, and also has a positive effect on fruit development. Organic fertilizers such as well-rotted compost and chicken manure can be used and applied at the recommended amount. 4.

Trace element fertilizer: Grapes need to be supplemented with trace elements, such as iron, zinc, manganese, etc. You can choose the corresponding trace element fertilizer for application, but be careful not to overdo it so as not to cause damage to the plant.

Hello dear, when the grape grains are too small, you can consider using the following fertilizers to improve the development and quality of the fruit:1Phosphate fertilizer:

Phosphorus is a key nutrient that promotes fruit development and increases fruit size. You can choose phosphate fertilizers such as diammonium phosphate and monoammonium phosphate and apply them according to the instructions on the package. 2.

Potassium: Potassium is an important element in improving the sugar, color and taste of fruits. Potash fertilizers such as potassium chloride, potassium sulfate, etc., can be used and applied according to the instructions on the package.

3.Organic fertilizer: Organic fertilizer can improve soil texture and maintain soil moisture, and also has a positive effect on fruit development.

Organic fertilizers such as well-rotted compost and chicken manure can be used and applied at the recommended amount. 4.Trace element fertilizers:

Grape growth requires the replenishment of trace elements, such as iron, zinc, manganese, etc. You can choose the corresponding trace element fertilizer for application, but be careful not to overdo it so as not to cause damage to the plant.

Don't you use nitrogen fertilizer?

Kissing, the use of nitrogen fertilizer can be controlled during the fruit development stage of the grapes. Too much nitrogen fertilizer can promote vigorous growth of the vines, but it can be detrimental to fruit development, resulting in smaller or incomplete fruit grains. During the development of grapes, the right amount of nitrogen fertilizer can maintain the health and nutrient balance of the plant, but it should not be used excessively.

Too much nitrogen fertilizer can lead to overgrowth, which can affect the quality of the fruit. Therefore, in the secondary fruiting stage, the application rate of nitrogen fertilizer can be considered, and the supplementation of phosphate fertilizer and potassium fertilizer can be emphasized. Good.