When is it better to apply potassium fertilizer to grapes?

Many people think that phosphorus and potassium fertilizers are used for grape coloring, but in fact, the most important need for high potassium fertilizer is the expansion period. Grapes need potassium fertilizer throughout the growth period, potassium does not participate in the composition of grape organs, but plays an important role in the synthesis, conduction, transformation and other aspects of organic nutrients in the whole growth and development process of grapes, the demand for potassium is large, and it plays an important role in the synthesis and transformation of organic nutrients. It can promote root growth and branch ripening, help sugar conversion, promote berry ripening, and improve stress resistance.

Grapes are a seasonal fruit that people love, and our locally grown grapes are all Kyoho grapes, which only ripen in late August and are available for sale, although there are also early-maturing grapes, but they are not as rich and sweet as late-ripening Kyoho grapes. In the fruit filling stage, that is, when the fruit is soft, it is also the most important time, irrigating the roots with high potassium or light potassium to promote the fruit to turn color and accumulate sugar. This is my operation in grape production, welcome to comment and like.

After grape fruit set to fruit veraison, according to the orchard soil fertility, 5 10 kg of potassium sulfate per mu of vineyard is applied, and potassium dihydrogen phosphate solution can also be sprayed on the foliar surface, once every 7-15 days, 2-3 times. Potassium fertilizer is important throughout the growth period of grapes, especially during the growth period. Therefore, grapes are known as "potassium" crops.

Potassium fertilizer can promote fruit hypertrophy and ripening, improve varietal and shelf tolerance.

Specifically, how to manage fertilization, it is recommended not to use single-element fertilizer as much as possible, because the utilization rate of single-element fertilizer is low and the residue is high. It is recommended to use high-tower granulation compound fertilizer with good water solubility, especially high-tower granulated compound fertilizer containing organic silicon, which has the function of regulating soil and swelling period. The application of potassium fertilizer has a significant effect on promoting grape enlargement, early ripening, accelerating the aging of branches and vines, and improving grape resistance.

At the same time, it can also significantly inhibit major diseases such as grape anthracnose and black pox. So, apply potassium fertilizer for the expansion of the grapes

It is better to fertilize the grapes when they are growing, because this is when the grapes can grow larger.

From the time of fruit setting to veraison, 5 10 kg of potassium sulfate can be applied per mu of vineyard according to the soil fertility of the orchard. It has a significant effect on promoting grape enlargement, early ripening, accelerating the aging of branches and vines, and improving grape resistance. Foliar spraying should be carried out before 9 a.m. and after 5 p.m., and should not be sprayed at noon during high temperatures.

It should be done in the morning, and it is also important to avoid applying this potassium fertilizer to the roots, which can easily burn or rot the roots.

Potassium fertilizer can ensure the nutrition of grape planting, can absorb nutrients well, can also improve the survival rate of grapes, increase grape income, can make the grapes become very plump and so on.

Grapes require potassium and are known as potassium crops. Appropriate application of potash fertilizer, 1Good for promoting berry coloration and ripening.

2.It can improve the sugar content and taste of grapes. 3.

It can also promote the growth of grape roots, the ripening of branches, and enhance the resistance of grapes to cold and drought.

Grapes are potassium-loving plants, which need a large amount of potassium throughout the growth process, and potassium does not participate in the composition of grape organs, but plays an important role in the synthesis, conduction, and transformation of organic nutrients. The potassium content in young tissues is relatively higher, so the need for potassium is greater during the fruit expansion period. Potassium fertilization promotes the growth of grape roots, increases resistance to stress, aids in sugar conversion, and develops shoots and flower buds.

Potassium fertilizer can also promote the hypertrophy and ripening of grape fruits, improve variety, shelf tolerance, promote the growth and ripening of branches, and improve their resistance to cold, drought, high temperature and pests.

In the cultivation of grapes, grapes will find that they like potassium fruit trees, and if the correct scientific planting of potassium fertilizer for viticulture can achieve an unexpected harvest. The yield of potassium application increased, the sugar content increased to, and the coloring was good, the weight of the single fruit increased significantly, and the main diseases of the grapes (anthracnose, black pox, etc.) were significantly inhibited.

Grapes also need to be fertilized during the fruit-setting period, and when it is observed that its fruit grows to the size of a soybean grain, it can be applied with some human feces, nitrogen, phosphorus and potassium to relieve the difficulty of Hefei and urea, etc., in order to facilitate the growth and development of its fruit, otherwise the yield of grapes will decline if the nutrients are insufficient.

1.Moisture management.

Grape fruit set after entering the spike expansion period, spike swelling period is a period of greater plant water demand, in this period need to increase the number of watering, every 10 to 15 days to water, keep the soil in a moist state, so as not to lack of water in the plant caused by fruit expansion blocked, but imitation can not be overwatered, overwatering and rainy days need to be emptied of large source water, so as not to cause root rot caused by soil waterlogging.

2.Fertilization management.

Grape fruit set is the vigorous growth period, the demand for nutrients is large, appropriate fertilizer can promote plant growth, fruit expansion, flower bud differentiation and make the fruit sweeter, fertilization should be a small amount of many times, thin fertilizer diligent application, so as not to fertilize too much and too concentrated to cause plant fertilizer injury, at this time fertilization to nitrogen fertilizer, phosphate fertilizer and potassium fertilizer supplemented, every 10 to 15 days to apply fertilizer.

3.Trim management.

After grape fruit set, when the number of true leaves on the branch tip is about 10, in order to avoid the vigorous growth of the side branches of the bucket to absorb a large amount of nutrients, resulting in a reduction in the nutrients absorbed by the fruit and the quality of **, it is necessary to carry out topping and pruning the top tip.

4.Disease management.

When grapes encounter continuous rainy days, the air humidity is high, the soil is moist, and it is easy to develop cob brown blight, white rot, powdery mildew, gray mold, downy mildew and black rot, cob brown blight, white rot, powdery mildew and black rot can be controlled with 75% methyl tobuzine 1000 times solution, downy mildew can be controlled with 800 times of Radomir solution.

During the expansion period of young grape fruits, nitrogen fertilizer is the main fertilizer, combined with phosphorus fertilizer, human feces and urine, diammonium phosphate, etc.

Top dressing in the grape berries begin to ripen at this time, when the fruit begins to color, the acidity decreases, the sugar content increases, phosphorus and potassium fertilizers should be applied as the mainstay, and a small amount of nitrogen fertilizer can be used. Foliar spraying of potassium dihydrogen phosphate or wood ash leaching solution on the grape surface, and topdressing of human manure, cake fertilizer, concealed width of kang soil branches and plant ash on the roots are all conducive to increasing the sugar content of fruits, improving fruit quality and promoting branch ripening.

During the expansion period of grape seedlings, nitrogen fertilizer was mainly used, combined with phosphorus fertilizer, manure fertilizer, diammonium phosphate and other top dressing. When the grape berries begin to ripen, the fruit begins to change color, its acidity decreases, and its sugar content increases. , staring at the cavity of the rock with a small amount of nitrogen fertilizer to make.

Soak potassium monohydrogen phosphate or vegetable ash on the grape leaves.

Many people think that phosphate fertilizer is used to color grapes, but in fact, the highest potassium fertilizer is needed during the expansion period. Potassium fertilizer is needed throughout the grape growth period, potassium does not participate in the composition of grape organs, but plays an important role in the synthesis, conduction and transformation of organic nutrients, and plays an important role in the synthesis and transformation of organic nutrients in the process of grape growth and development, which can promote root growth and branch maturity, help sugar conversion, promote berry ripening, and improve stress resistance.

Grapes are loved as seasonal fruits, and our locally grown grapes are Kyoho grapes, which ripen and go on sale in late August every year. There are also early-maturing varieties, but in terms of fullness and sweetness, they are not as good as late-ripening Kyoho grapes. During the fruit-filling period, which is also the most important time when the fruit becomes soft, the roots are watered with high potassium or light potassium to change the color of the fruit and accumulate sugar.

This is what I do in grape production, and I evaluate that it is best to choose basal fertilizer for grapes in autumn. During this period, the temperature changes slightly, and the air and soil temperature are higher than in spring, which is conducive to the growth of new grape roots and is suitable for the cultivation of new grape seedlings. At this time, the nutrients required by the grapes are balanced, and organic fertilizers can be used, or they can be combined with green continent macro-element water fertilizers, roots and seedlings.

The amount of fertiliser applied varies depending on the age of the vines, but young trees are generally 3-4 kg. As a perennial vine, grapes absorb about 6-8 kg of potassium from the soil per acre of grape plants every year, of which the potassium content in young organs is as high as 30%-60%, so grapes are called "potassium plants". Grapes have a high demand for this type of potassium, and the symptoms of potassium deficiency are easy to appear in production, which is the reason why people pay attention to potassium.

Many people think that phosphate fertilizer is used to color grapes, but in fact, the highest potassium fertilizer is needed during the expansion period. Potassium fertilizer is needed throughout the grape growth period, potassium does not participate in the composition of grape organs, but plays an important role in the synthesis, conduction and transformation of organic nutrients, and plays an important role in the synthesis and transformation of organic nutrients in the process of grape growth and development, which can promote root growth and branch maturity, help sugar conversion, promote berry ripening, and improve stress resistance.

Potassium fertilizer is mainly needed during the fruiting period, and can be fertilized after the flowers have fallen, at a rate of about 50 to 80 grams per grape.

The demand for potassium fertilizer is mainly reflected in the flowering process, which is immediately after flowering, using about 50 grams per grape.

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Potassium dihydrogen phosphate is a very good phosphorus and potassium two-element fertilizer, which has the characteristics of high content, high purity, full water solubility, fast effect, wide range of application and high safety factor, and is suitable for different growth periods of grapes. Generally, before and after flowering, we can use it to promote the germination and flower bud differentiation of the potato system, such as the root system, to provide energy for flowering and fruit set; When it comes to fruit coloring, it can also promote the flouring of grapes and increase the sweetness of the fruit; After fruit picking and grinding, the use of potassium dihydrogen phosphate can effectively promote the aging and ripening of branches and improve the degree of lignification of fruits.

Probably apply potassium fertilizer when the grapes are enlarged; Prune the branches and leaves frequently, be sure to bag to control the water, and spray some regulators, so that the color is faster.

Generally, after planting, fertilization is carried out within 2 to 3 months. The grapes can be bagged so that they can be colored and sweetened.

Grape potassium fertilizer application time: After the grapes are set to the fruit color change period, the potassium dihydrogen phosphate solution can be sprayed on the leaves, once every 7-15 days, 2-3 times in a row, and the spraying time is 9 o'clock in the morning. Before and after 5 p.m.

If you want to make the grapes color faster, you should apply fertilizer in time, 40 days before ripening, and spray foliar fertilizer. Apply 100 grams of potassium sulfate per plant, spray potassium dihydrogen phosphate foliar fertilizer, can promote color. If too many grapes are dropped, you can spread a reflective film on the ground to improve the coloration.

Proper pruning of tree branches is also required to promote better lighting and ventilation. In addition, it is strictly controlled, and the water is generally cut off 20 days before picking.

1. The fertilization period of grapes should be based on the needs of grape growth and development. According to the different stages of the development of the grape growth cycle, the specific period of fertilization in a year is: the application of basal fertilizer is generally carried out before the grape root system is about to enter the second growth high selling code peak, the northern region is carried out in September and October of each year, and the southern region is carried out in October and November, at this time the fertilization is conducive to the injured root system to promote new roots and increase the storage of tree nutrients.

Basal fertilization should ideally be completed by early October in the north and in late November in the south. If there are other reasons for not applying basal fertilizer in autumn, you can sprinkle fertilizer between the grape rows before budding in the spring of the following year, and use a rotary tiller to turn the fertilizer into the soil shallowly, and irrigate it once to permeate the water.

2. Top dressing is carried out during the grape growth period to promote plant growth and fruit development. Top dressing is mainly based on fast-acting chemical fertilizers, such as bicarbonate, superphosphate, potassium sulfate, etc. Top dressing method:

Dig a shallow ditch of 10 to 15 cm from the vines at a distance of 50 to 60 cm from the vines, spread fertilizer evenly in the ditch, and fill the ditch. The fertilization period, type and quantity of top dressing should be applied in advance according to the growth and development process of grapes in a year and the demand for nutrient types. In general, top dressing mainly includes the following types.

The fertilization time of the non-buried soil cold-proof area is half a month before germination, and the buried soil cold-proof area is mostly carried out after the excavation and shelf, and the soil is furrowed. This topdressing is mainly nitrogen fertilizer. When topdressing, be careful not to touch the branches, to the rabbit to cause too much wound flow, after the top dressing is completed to irrigate immediately.

Generally, 50 kg of dihinge compound fertilizer and 40 kg of potassium sulfate are applied every 667 square meters.

3. 7 to 10 days before grape flowering, when the inflorescence begins to elongate, apply pre-flowering fertilizer to further promote the development of the inflorescence and improve the fruit setting rate. Usually 30 kg of dihinge compound fertilizer and 30 kg of potassium sulfate are applied per 667 square meters. If the soil is fertile and watery and the tree is strong, top dressing can be avoided at this stage.

4. After flowering, when the young fruit soybeans are old, the top dressing should be applied with nitrogen, phosphorus and potassium, especially the application of phosphorus and potassium fertilizer. 50 kg of ammonium bicarbonate, 30 kg of superphosphate and 30 kg of potassium sulfate were applied per 667 square meters.

5. After the fruit is sealed and before veraison, potassium fertilizer is the main fertilization at this stage, which improves the coloring rate and sugar content of the fruit and promotes the normal aging of branches. 40 kg of urea and 30 kg of potassium sulfate per 667 square meters. For vineyards with weak trees or high tolerance yields, urea can be increased to 60 kg per 667 m² to prevent wilting or veraison.