Why do branches drip in spring?

I think it's a normal natural phenomenon caused by the temperature rising in spring, and the temperature outside the branches is much higher than the temperature of the branches themselves. Especially in the cold and freezing places in the north, dripping water at the joints of tree branches is more common.

When spring comes, walking on the campus path, watching everything recover, the surrounding greenery becomes thicker little by little, and the water droplets condensed on the branches give people a moist and tranquil feeling, which makes people forget the cold and dryness of winter, and a warm current can't help but rise in the depths of their hearts.

Friends who have lived in the countryside may have had the experience that in summer, there is often a thick layer of water droplets on the outer wall of the water tank at home for water or pickles, and I think this is the same principle as the dripping of water from tree branches, so there is no fuss.

In addition, I think there is another reason why the joints of the branches are dripping, that is, the joints of the branches are rougher, and there are more lines and cracks. Frost and snow are particularly easy to hide. When the weather is warm, the frost and snow hidden at the joints of the branches have nowhere to hide, and they begin to melt silently, so that the joints of the branches begin to drip water.

Especially at noon in early spring, the phenomenon of dripping water at the joints of the branches is more obvious. Walking on the tree-lined path, I saw the raindrops falling at the joints of the branches, ticking and ticking, as if the beautiful spring girl told us that winter has passed, and we are ready to welcome the baptism of spring.

Another possibility is that there is a lot of snowfall in winter, and the trees absorb more water in the winter. In order to maintain the balance of water in the spring, it is necessary to eliminate excess water from the body in this form, and it is the same as the overflow of essence.

So I think the Creator is magical, and He has created all kinds of amazing natural phenomena.

In early spring, everything comes back to life. The various animals that hibernate in the winter due to the cold weather have finished hibernation and come out of hibernation, and most plants have begun their seasonal cycle. However, there are many observant people who will find that in early spring, there are many times when there are water droplets at the joints of the branches of plants.

Anyway, I think there are two reasons, and we only mention one in the book.

The first reason is relatively simple, in early spring, the weather is still relatively cold. And we often say that the spring is cold, which means that the temperature in spring is still relatively low. But the temperature at night in spring is lower, so the air has less ability to contain moisture, so the moisture in the air condenses and clings to the branches, which is what we often call dew.

As soon as the sun comes out and the temperature rises, all the dew evaporates. So the dew can only be seen by the early risers. In fact, not only spring, but also dew is available all year round.

There's another reason why it's in our book. In early spring, the trees are starting to sprout, but the buds have not yet grown into leaves, and the stomata of the surface area of the buds are not enough to support the transpiration of the tree, so those branches help the young leaves to transpire. Help each other, anyway, it's the same mother, helping the leaf is helping itself.

And transpiration has water, and when all the water is condensed, it drips. As for the joints of the branches, it is because the joints of the tree usually have some small holes or some small cracks, and the bark is too hard in other places, and the water in the tree can't come out from other places, so it only comes out of the joints, condenses, and then forms the phenomenon you see.

Grape wound flow is called "wound flow", and once the grape is pruned or accidentally broken during the dormant period, it will produce wound flow. is a common phenomenon. Generally, when the soil temperature reaches 6 10, the grape root system begins to move, the sap and the organic nutrients in the tree body are transported to all parts of the tree along the xylem, and the wound will flow out of the homeopathic flow, and the tree drips like raindrops when it is serious, and the wound flow is very unfavorable to the growth and development of grapes in spring, and attention should be paid to prevention and control.

The specific measures are as follows:

Control the tree potential. Wang tree is seriously injured, weak tree is lightly injured, and fertilization should be scientifically controlled in the production process; Watering should be finished 10-15 days before the wound flow.

Choose the right time for pruning. It is best to prune with leaves in late autumn, or within 4 weeks before the grape drain.

Avoid mechanical injury.

Wound flow**: First, burn the wound to promote the formation of a "dry scar"; the second is the lime paste application method; The third is the membrane wound dressing method.

The vine branches drip water, and the jargon is called "wounded flow.""。

Grape pruning must be done during the dormant period after the leaves have fallen. At that time, the sap does not flow, and there is no wounded flow. If the sap starts flowing and pruning, it will flow and even die.

Therefore, you should take immediate steps to prevent further flow. Wrap the damaged part with some yellow mud, then wrap it with plastic sheeting and tie it tightly, and it will heal automatically after a week.

The dripping of grape vine branches is called wounded flow, which can occur when the grapes are dormant when pruned or accidentally broken branches.

That's the poplar tree is sick and needs to be sprayed.

After the water absorption of plants is released into the air through transpiration from the stomata of the leaves, the spring is already humid and most of the leaves are newly grown, and the absorbed water cannot be completely discharged through transpiration, so it will be discharged on the surface of the leaves or branches with cracks and tender green!

Pruning branches in spring is because spring is the germination period, and pruning off some branches that are not the main trunk is conducive to the absorption of nutrients and water by the main trunk branches, which is convenient for their growth.

Branch pruning order and precautions.

1.The order of trimming.

Independent branch pruning should master the principle of one look, two pruning, and three inspections, and observe the growth potential, branch distribution and crown status of the tree before pruning, especially for perennial branches should be carefully considered before pruning. When cutting, from top to bottom, from the inside and outside, first rough and then fine. Starting with thinning pruning, cut off dead branches, dense branches, overlapping branches and other branches first, and then shorten the remaining branches.

The cut buds are left in the direction where the shoots are expected to grow. When retraction pruning is required, large branches, then middle branches, and finally small branches should be treated first. After pruning, check whether the treatment is reasonable, whether there are missing cuts and wrong cuts, so as to correct or repair the cuts.

2.Trimming considerations.

1) Pay attention to safety: When pruning, all utensils and machinery must be flexible and firm to prevent accidents. Pay attention to high-voltage lines when pruning street trees, and prevent large sawed branches from hitting pedestrians and vehicles.

2) Do not tear the bark when wiping the buds and removing the tillers, so as not to affect the growth of the tree.

3) Pruning tools: the cutting edge is sharp, and the tree guard should be treated in time after pruning the diseased branches, and then prune other branches to prevent cross-infection. The pruned diseased branches are collected and burned in time.

Spring is the time when everything grows, so pruning trees at this time makes it easier to grow and shape.

Grapes come from the branches of the tree dripping water, and the jargon is called "the source of wounds.""。

Grape pruning must be done during the dormant period after the leaves have fallen. At that time, the sap does not flow, and there is no wounded flow. If the sap starts flowing and pruning, it will flow and even die.

Therefore, immediate measures should be taken to prevent further flow. Wrap the damaged part with some yellow mud, then wrap it with plastic sheeting and tie it tightly, and it will heal automatically after a week.

Plants pass through the root system to absorb water and nutrients before passing through.

tree trunks to transport water and nutrients. It's like a human artery is cut and bleeding, and there are a lot of nutrients in the stem of the vine plant, and when you cut it off, there will be a lot of nutrient juice flowing out, and then you only need to wrap the damaged part with some yellow mud, and then wrap it with plastic sheeting, and tie it tightly, and it will heal automatically after a week.

There are a lot of nutrients in the stem of the vine plant, and when you cut it off, there will be a lot of nutrient juice coming out, so you only need to wrap the damaged part with some yellow mud, and then wrap it with plastic sheeting, and tie it tightly, and it will heal automatically after a week.

Maple poplar (Pterocarya stenoptera c.) dc）

Aliases: poplar, big-leaved willow, big-leaved poplar, etc. deciduous trees, up to 30 m tall and up to 1 m DBH; The bark of young trees is smooth, light gray, and in old it is deeply longitudinally lobed; twigs grey to dark brown with grayish-yellow pores; The buds are stalked, densely covered with rust-brown shield-like glands, and the leaves are mostly even or odd pinnate compound leaves.

Maple poplar is light-loving, slightly shade-tolerant, and young trees are shade-tolerant and cold-tolerant, mainly distributed in the south of the Yellow River Basin. The maple poplar has a broad canopy, dense foliage and rapid growth, and is a common shade tree and shelter tree. Moreover, the bark also has the effects of dispelling wind and relieving pain, killing insects, and collecting sores.

First, the principle of pruning. Grapes are vine-based deciduous fruit trees that must be pruned once a year during planting. If pruning is not carried out for many years, the vines will climb all over the trellis, and the dead branches, overly dense branches, weak branches, slender branches, diseased branches, and disabled old vines will not be effectively removed, and the tree shape will be disturbed, and the ventilation and light transmission between the trees will be affected, and the breeding of diseases and pests will be triggered, resulting in serious flower and fruit loss, resulting in no harvest.

Grape winter pruning is to improve the above-mentioned deficiencies, so that the grape branches and vines are always healthy and strong, effectively control the upward movement of the fruiting part or the aging and baldness of the main vine at the back, through the pruning technology, it can adjust the contradiction between the ground and the ground, growth and fruiting, balance the growth of the whole plant before and after, increase the amount of fruit, and improve the quality of grape fruit.

Second, the pruning time. It is more suitable to fall leaves and before the beginning of spring, that is, from mid-December to early February of the following year.

3. Pruning technology. The pruning method is illustrated with a trellis of grapes planted for more than four years, occupying 6-10 square meters per plant.

1. Prune useless branches. First of all, cut off the old and weak residual branches, dead branches, diseased and insect branches, slender branches (more than 0·5 cm in diameter), and some overlapping branches from the base of the scaffolding.

2. Cut the length. In practical application, the length of pruning should be determined according to different varieties, the growth, location, and maturity of the branches. In principle, the pruning and retention of fruiting mother branches are long, medium and short according to the strong, medium and weak pruning of the annual growth potential, that is, the strong branches are long and the weak branches are short, the ends are long and the base is short.

As far as the whole tree is concerned, it should be a combination of long, medium and short pruning, that is, the number of buds should be left: 8 or more buds at the long tip, 4-7 buds at the middle tip, and 1-3 buds at the short tip.

3. The amount of branches and buds left by the fruiting mother branch. The fruiting mother branch refers to the shoots that will produce new shoots and bear fruit in the next year. If there are too many branches, too many new shoots will be extracted and too dense, which will affect the ventilation and light transmission of the shelf surface, and breed diseases and pests, and at the same time, too much fruit will cause the tree to weaken, affecting the quality and growth results of the next year.

The number of fruiting branches and buds that are left to bear during pruning varies depending on the variety, frame type, and tree shape. Taking the above-mentioned scaffolding as an example, it is advisable to select 40-70 fruiting mother branches and 180-300 buds. When pruning, attention should also be paid to making the main vine and the fruiting mother branches on it evenly distributed on the shelf surface.

Fourth, pruning precautions. The diameter of the branch at the cut should reach more than 1 cm. When pruning useless branches, they should be completely removed from the base.

The cut branches and leaves should be burned intensively or buried deeply. At the same time, in combination with winter pruning, organic fertilizer should be applied enough to lay a good foundation for the next year's fruit.

That's grapes.

In wound flow, it refers to the phenomenon that a large amount of sap flows out from the fresh cut or broken wound on the branch after the root system begins to move in early spring (generally the root mark temperature reaches 6-9), that is, the period from which the grape sap begins to flow to the time before and after budding. Wounds can cause nutrient loss and affect the growth of the vine. Therefore, in addition to avoiding pruning during the wound period, the cut should also be dried and sealed before the wound period, and cut 2-3 weeks before the wound period.

The strong active force can wash away the condensation in the fruit tree, smooth the benign delivery of nutrients, heal the laceration of the delivery duct, and prevent the flow of water in the fruit tree.