How to top dress the fruit and how to choose the time?

One month after the planting of fruit trees, it is best to use organic fertilizer, the concentration of fertilizer should not be too high, do not water after fertilization. Organic fertilizers should also be supplemented in moderation during the flowering period. During the enlargement period of the fruit, a small amount of nitrogen and potassium fertilizer should be supplemented.

If you want to top dress the fruit, the time of top dressing should be carried out according to the local climate, because if the climate is good, fertilization will be more effective.

Autumn basal fertilizer is also known as confinement fertilizer, it is best to apply confinement fertilizer to the fruit tree immediately after picking, so that the fruit tree will have enough time to absorb nutrients and store it in the tree, and the nutrition can keep up in time in the next spring without defertilizing. In order to save trouble, most fruit farmers only use large chemical fertilizers, because large chemical fertilizers are fast-acting fertilizers, which will cause fruit trees to sprout in the coming year, and the branches will not grow good fruits.

Ignoring the fertilization of organic fertilizer and biological fertilizer and biological fungus agent, because organic fertilizer is a slow-acting fertilizer, and autumn basal fertilizer is a process of laying the foundation, so if you can use more organic fertilizer, it is more conducive to tamping the foundation, but it does not mean that you can't use large chemical fertilizer.

This proves that the best time to apply basal fertilizer in autumn is from August 20 to September 10, which just verifies the two nutritional stages in the growth habit of Red Fuji: spring shoots use the nutrients stored in the previous year, and stop growing from late May to early June, which is the first nutritional stage; From late June to the year of defoliation, it is said that it depends on what fruit trees, generally speaking, the use of base fertilizer is carried out after harvesting, and the high-nitrogen compound fertilizer or calcium supplement is applied before germination, and the balanced or high-phosphorus type is used in the young fruit stage, and the high-potassium type is used in the expansion period and coloring stage.

Of course, as a human being, we have the ability to take the initiative and know that we need to eat when we are hungry, and sometimes we will eat because we are not hungry. Moreover, because of the individual's differences, some people eat three meals a day, some people eat more than one meal a day, some people even skip grains. Depending on what kind of tree you plant, each type of tree, the amount of fertilizer and element required in each period are different, but overall, apply high nitrogen fertilizer in early spring to promote crop growth, quickly improve leaf color, apply high potassium fertilizer at the flowering and fruiting stage, improve fruit setting rate and accelerate fruit expansion, apply high phosphorus fertilizer after fruit picking, as the saying goes

The time is before or after flowering after clearing the garden, mainly nitrogen fertilizer, because the liquid nitrogen consumption is serious after the tree flowering, and if nitrogen is not replenished in time, it will fall flowers and fruits, (apple trees are thinning flowers in the bud stage to save energy.) There are irrigation conditions can be fertilized with water, unconditionally can be applied after root injection or rain, fertilization is a very technical agricultural yield increase measure, some farmers often spend money to buy a lot of fertilizer, but the effect of application is not ideal. This is because of the lack of understanding of fertilization, fertilization should pay attention to the type of fertilizer used, the amount of fertilizer, the nutrient distribution ratio, the fertilization period, the fertilization method and the fertilization of the tree is divided into two kinds, the bottom fertilizer is also called the base fertilizer to soil miscellaneous fertilizer or fermented pigs, cattle, sheep and other manure, to freeze before the ditch or hole application.

It is not suitable for use after the year. The second is chemical fertilizer, no matter what kind of application it is, it must be watered immediately to increase the effect. If the tree is late, potassium sulfate should be applied several times.

Fertilize in the spring at a young age. In the process of planting fruit trees, spring is an important period for their budding, leaf development, and flowering. This period includes the energy of all life activities of the fruit tree and the growth of all parts, and it is very necessary to provide a large amount of nutrients, which is related to whether the fruit tree can grow and develop healthily in the later stage.

So in the spring, it is the first important period for the fruit trees to be fertilized. 2. Fertilization at the beginning of the fruit period in summer. Summer is an important period to promote the differentiation of fruit trees and improve the yield and appearance quality of fruit trees, so it is also very necessary to top dressing in summer.

According to a large number of practices, it has been proved that when topdressing in summer, the fertilizer time with high potassium, low nitrogen and low phosphorus is the most appropriate. And the earlier the topdressing time, the better, which is most beneficial to the growth of fruit trees. 3. Fertilization in autumn during the peak fruit period.

Autumn is an important period for fruit trees to store nutrients, and fertilization has a very important transitional effect on fruit trees at this time. Because if the fruit tree bears too much fruit or has too many insect pests during the growing season, it may cause overnutrition; If the nutrients stored in the tree are not enough to continue budding, flowering and leafing in the following year, the overall yield and quality of the fruit tree will be affected.

Generally, it is better to fertilize in the evening, because the soil temperature is relatively high, and after fertilization, the fertilizer will quickly melt into the soil and be absorbed.

1.To fertilize fruit trees, we must first know that the absorption of fertilizer by fruit trees is mainly done through root hairs. Therefore, spraying a new type of high-lipid membrane compound fertilizer in the concentrated distribution area of root hairs can improve fertilizer utilization efficiency, promote early growth and rapid growth of fruit trees, and increase yield and income.

2.Fertilization of fruit trees should be concentrated at the edge of the crown projection or slightly farther away, not too close to the trunk, because there are thick roots near the trunk, and there are few fine roots and root hairs, which is not conducive to the absorption of fertilizer.

3.To fertilize fruit trees, deeply grasp the following principles: fruit trees with deep root distribution should be applied deeply, and vice versa; Organic fertilizer decomposition is slow, but the fertilizer period is long, can be applied deeply, chemical fertilizer fluidity is large, can be shallow, such as pear trees and other deep-rooted fruit trees should be applied organic fertilizer at a depth of 40-60 cm, plum trees and other shallow root fruit trees should be applied at a depth of 30-40 cm.

After fertilization, a new type of high-lipid film was sprayed to improve fertilizer efficiency.

Dig holes around the crown of fruit trees, generally 30-40 cm away from the hole, 15-20 cm deep is appropriate, cover the soil after fertilization, and the orchard with conditions can also be watered appropriately after topdressing.

After picking the fruit, use organic fertilizer, and use chemical fertilizer for the fruit quickly and for a long time. Fertilize in radial furrows, watering after fertilization.

All healthy fruit trees require a high amount of fertilizer. Although all plants need 16 elements, which are considered essential, a large number of elements are the ones that are consumed the most from the soil. It is important to fertilize regularly to keep the trees healthy.

The macronutrients that we should apply regularly are nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (mg), and sulfur (S). Carbon, hydrogen, and oxygen are also nutrients that are needed in large quantities, but these elements are provided by air, water, and organic matter.

There are two types of fertilizers that can distinguish between phytonutrients.

Chemical fertilizer. These fertilizers are processed minerals or chemical salts.

Whether you're applying organic or conventional fertilizer, it's important to remember that only apply fertilizers that are lacking in the soil and needed by the plant. Timing of fertilization is important to protect the groundwater table and waterways from unintentional contamination from runoff and leaching. You can only fertilize the fruit trees during the year when they will use the fertilizer you provide in the soil.

Fruit trees in Sichuan can grow on a wide variety of soils, but in most places, fertilization improves plant vigor and health. To get an accurate picture of the nutrients present and deficient in your orchard, you should take soil samples. When you get the results of the soil test, you will be able to provide nutrients that the soil is lacking.

Determine the appropriate time for fertilization.

Fruit tree base fertilizer should be applied in autumn: Timely application of base fertilizer in organic orchards can not only improve the soil, stabilize and increase yield, but also make organic fruit trees grow robust and enhance the stress resistance of organic fruit trees. Basal fertilizer is best applied after fruit harvest.

Because the autumn application of basal fertilizer coincides with the third peak of the root growth of organic fruit trees, the roots injured by ditching and digging holes are the easiest to heal and can send out new roots, which is conducive to the recovery of the root system. When applying basal fertilizer in autumn, the root system has a strong ability to absorb water and fertilizer, which increases the nutrients in the tree and increases the concentration of tissue cells, which is conducive to the cold resistance of organic fruit trees to overwinter. The application of basal fertilizer in autumn is conducive to the decomposition and transformation of organic fertilizer in winter and spring and the continuous release of nutrients, and timely supply of organic fruit tree flower bud differentiation. Autumn application of basal fertilizer can improve the fruit setting rate of trees. Fertilization standard fruiting trees are generally not less than "1 kg of fruit and 2 kg of fertilizer".

Fertilizer is applied at different times according to different purposes and methods. General base fertilizer can be applied before crop planting, seed fertilizer can be applied when sowing or planting, topdressing time needs to be decided according to different crops, general vegetables can be topdressed every 7-15 days during the growth period.

Fertilization time affects the play of fertilizer efficiency: the best time for fertilization is before 10 o'clock in the morning and after 4 o'clock in the afternoon, avoid fertilization under the strong sunlight at noon, and avoid fertilization on rainy days.

When to fertilize fruit trees? How to fertilize?

Generally speaking, the effective period of fertilizer products is as follows (for reference only): ammonium carbonate takes effect on the same day, and the effective period of fertilizer is 15 days; Ammonium chloride is effective in 3 days, fertilizer is effective in 25 days, and fertilizer is defertilized in the later stage; urea, 7 days to see the mold to prepare the front effect, fat denier effect period 45 days; Compound fertilizer is effective in 10 days, and the fertilizer effective period is 90 days; Biological fertilizer generally has a rolling effect of about a month, and the effect is not very obvious in crops with a long growth cycle, but the fertilizer effect can last for 6-8 months; For example, fertile leaf fertilizer not only has a long fertilizer effect, but also improves the soil and soil quality. Hormones do not have much nutrition on their own and do not really help to increase production.

1. Apply flower-preserving fertilizer before flowering. Fruit tree germination, flowering period consumes more of its own nutrients, if the tree stored nutrients in the previous year is insufficient, nutrients ** is not timely, it will prolong the flowering period and reduce the fruit setting rate. Therefore, before flowering, it should be properly fertilized, that is, 50% of the total nitrogen fertilizer and 20% of the total potassium fertilizer should be applied before flowering.

Conditionally, 1-2 times of 250 times of borax aqueous solution can be sprayed during the flowering period, which can preserve flowers and fruits, and greatly improve the fruit setting rate and the correct rate of fruit shape.

2. Apply stable fruit fertilizer after flowering. After flowering, young fruits and new shoots grow rapidly, and topdressing fertilizer can promote the new shoots to be strong, expand the area and thickness of leaves, improve photosynthetic efficiency, and reduce physiological fruit drop. If the amount of fertilizer is sufficient during the flowering period, it should be appropriately applied less fertilizer after flowering.

3. Apply bud promoting fertilizer before flower bud differentiation. At this stage, some new shoots have stopped growing, and the young fruits are rapidly expanding, so if an appropriate amount of nitrogen, phosphorus and potassium fertilizers are applied in time, it can not only effectively improve the photosynthetic efficiency of leaves, promote nutrient accumulation, but also facilitate flower bud differentiation, and significantly reduce the occurrence of the phenomenon of "fruit tree size year".

4. Apply strong fruit fertilizer in the later stage of growth. At this stage, the topdressing fertilizer can not only increase the yield of the year, improve the quality of the fruit, enhance the market competitiveness of the fruit, but also promote the differentiation of flower buds and enhance the tree potential. Therefore, 60% of the total amount of potash fertilizer, 10% of the total amount of phosphate fertilizer, and 10% of the total amount of nitrogen fertilizer should be chased in time.

5. Apply tree fertilizer before and after fruit picking. Tree fertilizer is also known as base fertilizer (i.e., human and animal manure, straw and weed piles), fruit trees after a year of growth, flowering, fruiting, consume a lot of nutrients, winter urgently need to timely replenish the tree to restore the tree, enhance the ability of the tree body to resist frost damage. Tree fertilizer should generally be applied 7-10 days before fruit ripening, and no later than November.

At this time, the annual amount of fertilization organic fertilizer is applied at one time, 90% of the annual amount of phosphate fertilizer, 40% of the annual amount of nitrogen fertilizer, and 20% of the annual amount of potassium fertilizer, and it should be mixed together and applied to the fertilizer area.