Recently I saw a few old pear trees flowers and fruits at the same time, what is the reason

The general law of annual growth and development of fruit trees is spring flowering and autumn fruiting, but under the constraints of special natural conditions in some years, fruit trees often have the abnormal phenomenon of secondary flowering in autumn. The second flowering of fruit trees in autumn will seriously affect the normal growth and yield of fruit trees in the second year, which is extremely unfavorable to fruit production and is a taboo in fruit tree production.

Why do fruit trees bloom twice in autumn? This is mainly caused by wrong cultivation methods and improper management practices. In areas with obvious seasonal changes in China, most fruit trees begin to sprout in spring, and successively bud, flower, bear and ripen fruits, and enter dormancy after falling leaves in late autumn.

When one of these links is disrupted, it will cause the growth and development rhythm of the fruit tree to be chaotic. For example, in the autumn harvest pests and diseases, resulting in the early fall of leaves or leaves eaten by pests, the light and temperature are still suitable for the growth of fruit trees, at this time, the fruit trees have formed mature dead buds, leaf buds will break buds and germinate, and the so-called "secondary flowering" phenomenon in the production of fruit trees appears, which occurs in some branches, whole plants or fruit trees without leaves.

The second flowering of fruit trees not only caused a huge waste of nutrients in the tree, but also caused a large decline in the amount of flowers in the coming year due to the early opening of flowers and leaves, resulting in heavy losses.

The early fall of leaves and the devouring of leaves by pests caused by diseases are the main reasons for "secondary flowering". In addition, poor soil and water conditions are also factors that cause the early fall of fruit leaves. In addition, special climatic conditions, such as abnormal, sustained high temperatures in late autumn, can also cause fruit trees to bloom in autumn. Therefore, in the production of fruit trees, it is necessary to strengthen the later management of fruit trees, especially the management after fruit picking, do a good job in pest control, and protect the leaves of fruit trees, so as to effectively prevent the disadvantages of "secondary flowering" of fruit trees. (Sun Yude, Agricultural Technology Station, Purification Town, Boxing County).

Pests and diseases and poor growth of pear trees will cause pear trees to drop fruit before picking, pear tree fruit setting period, pear load is too large, resulting in insufficient nutrients in the tree, can not keep up with the growth rate of pears, resulting in fruit drop, fruit hanging general, but improper topdressing in the later stage. Mainly caused by nutritional competition, fruit setting is a process that consumes nutrients, insufficient nutrition, reproductive growth and vegetative growth will compete against, and reproductive growth competition will fall however.

In order to prevent fruit drop, fruit trees should be given anti-fruit drop medicine at the time of flowering. If the fruit still falls after it grows, it is necessary to find the reason, see if the fruit tree lacks nutrients, lacks a certain element, and fertilizes it in time, or to see if the tree is sick, the leaves are insected and the fruit falls due to root disease. In the fruiting period of pear trees, due to soil-borne or fertilizer-borne harmful bacteria, a large number of pears breed in high temperature and high humidity environments, harming the root system of pear trees or the reed head of the roots, resulting in rotten skin or rotten roots, resulting in nutrient and water delivery disorders, and physiological dysfunction.

Fruit drop due to drought in the soil. Due to the spring drought for a long time without rain, the soil moisture is very poor, the soil dryness is serious, due to the severe lack of water and drought, resulting in the lack of water required for the growth and development of pear trees in the fruit-setting period, resulting in nutrient inability to transport, resulting in lack of water and fertilizer, after the autumn fruit harvest, strengthen fertilizer and water management to improve the nutritional conditions of the tree, combined with autumn shearing to do a good job of clearing the garden, spray the general tree protection before winter to prevent the invasion of pests and diseases, and spray the Kao No. 3 solution after the beginning of spring to promote the differentiation of flower buds and improve the quality of flower buds.

The main reason for fruit drop is that the nutrients in the plant are not enough to support the needs of the endosperm development of young fruits, and the base of the fruit stalk forms a layer separation and makes the young fruit fall off, a self-regulating phenomenon that overcomes undesirable factors. Caused by root disease. The neck of the tree is covered with white mycelium, which is preliminarily determined to be caused by white silk disease, and the roots can be irrigated with potassium permanganate solution or double Bordeaux solution.

It is caused by poor drainage of the site. Or the pests in the roots of the tree should be found in time to solve the problem so that it can recover as soon as possible. Because of the roots of the tree spread a layer of organic soil, or compound fertilizer.

There are some pests and diseases, and the soil is not nutritious and not watered regularly, and the land is particularly dry, which can cause fruit drop.

It may be that the nutrients are not sufficient, or the branches grow vigorously due to excessive fertilization, or it may be infected with some pests and diseases, or it is the use of too many drugs, which causes some damage.

Nope

Under normal circumstances, the flower buds of the pear tree will bloom in the spring of the following year, but if the pear tree encounters adverse climatic and environmental conditions after germination, flowering, and fruiting in the current year, there will be a second flowering, so when the pear tree appears a second flowering, it is likely to be caused by abnormal climate.

The so-called secondary flowering of pear trees refers to the phenomenon that the flower buds of the year are differentiated and bloom in the autumn of the same year. The occurrence of this abnormal physiological phenomenon not only consumes the nutrients stored in the tree, but also leads to the insufficient nutrients required by the flower buds of the tree in the following year. It will also lead to a loss of the number of flower buds that bear fruit in the pear tree, resulting in a low amount of flowers and low fruit set in the following year.

How to prevent the second flowering of pear trees

1. Strengthen management.

According to the growth and fruiting characteristics of pear trees, reasonable pruning, flower thinning and fruit thinning and reasonable load should be implemented. Apply callus antiseptic film to the wound caused by pruning in time to protect the wound healing tissue and prevent germs from infecting the wound. Pay attention to the application of organic fertilizer after fruit picking.

Timely fertilization to restore tree vigor as soon as possible, foliar fertilization can also be carried out during the growth period and after fruit picking, and foliar spraying can be carried out with a mixture of potassium dihydrogen phosphate and urea.

For the slight orchard that has already had secondary flowering, you can remove flower buds or flowers and fruits, and at the same time apply some nitrogen fertilizer to inhibit the growth of flower buds. For pear trees with serious secondary flowering, high flower buds can be carried out, that is, the flower buds that will be thinned in winter can be cut from the sturdy pear trees for pasting flower buds, and these high flower buds can be used to make up for it, and the management can be strengthened to reduce yield loss.

2. Supporting drainage and irrigation facilities.

In the pear orchard, attention should be paid to the construction of orchard drainage and irrigation facilities, so that it can be watered in drought and drained when waterlogged, so as to meet its normal demand for water as much as possible and avoid leaf fall caused by drought and flooding. After fruit picking, basal fertilizer is applied at the same time to cut off part of the root system of the pear tree, temporarily breaking the balance between the aboveground and underground parts of the tree, thereby inhibiting the germination of flower buds.

The pear tree appears twice.

Common causes of bai flowering are:

1. When pest control is not as good as zhi, dao

As a result, the leaves fall off in advance or are eaten by pests, and the pear trees germinate for the second time in autumn;

2. Pesticide damage occurs in autumn, causing the leaves to fall off in advance. Since the pear tree is a plant that flowers first and leaves later, if it sprouts a second time in autumn (August to October), it will bloom a second time in most cases (the flower buds of the pear tree have already differentiated in August).

Although the pear tree blooms in March every year, it often grows "flower buds" in June and July of the previous year, and it is not visible from the outside because it is inside the tree.

When the nutrients in the pear tree accumulate to a certain extent, or due to some reason there is excess nutrients in the pear tree, resulting in the early development and maturity of flower buds, coupled with the ambient temperature suitable for flowering, the plant will form a "sensory" error, thinking that it is the flowering season and will bloom.

If the light is good and the temperature is low, the pear trees "mistakenly" think" that spring is coming, so they bloom early, but these pear blossoms will wither and will not bear fruit. Although this situation has some ornamental value, it can seriously affect the fruit yield in the following year.

Most of the trees bloom in spring and ripen in summer and autumn. Some fruit trees also bloom once in the fall. This is due to a specific climate anomaly or a diseased insect infestation.

Autumn rains and high temperatures will awaken flower buds that are already dormant and bloom early. In autumn, there is a pest in the orchard, and the leaves fall off in large quantities, which also wakes up the flower buds that have fallen asleep.

That's because pear trees have severe abnormal leaf loss during the year, which disrupts the normal growth pattern. It will affect the results of the following year.

Pear trees bloom twice a year with no sign and are the result of poor management. Mainly in summer and autumn pest control is not timely, resulting in part of the leaves falling off or being eaten by pests, the temperature in autumn is higher, causing secondary germination, and the pear tree is the first flowering and then leafy plants, in September the flower buds have been basically differentiated, so there is a phenomenon of secondary flowering.

If all the flowers on the tree are in full bloom in the fall, the next year there will be no harvest (most fruit trees have flower buds that only diverge once a year). Therefore, after the fruit is harvested, it is also necessary to strengthen pest and disease control, protect the leaves, and ensure the normal defoliation in autumn.

Why is it that the pear trees of the same land have good fruit setting for old trees, but less fruit for young trees of 5 years?

Pro, the old pear trees in the same field set fruit well, and the 5-year-old young trees have less fruit set, there may be the following reasons: the growth and development of young trees is not complete: the root system and branches of young trees are not fully developed, and cannot provide enough nutrients and water for fruit growth and development, so there are fewer fruit sets.

Young trees are affected by pests, diseases and stresses: Young trees are relatively weak in their resistance to pests and diseases, and are susceptible to pests, diseases and stresses, resulting in a decrease in the number of fruit sets. The saplings are not sufficient:

The young trees are relatively weak and cannot provide enough nutrients and water for fruit growth and development, resulting in a decrease in the number of fruit sets. Poor pruning of young trees: Improper management of pruning sails of young trees, with too many or too few branches to provide proper light and air circulation, resulting in a decrease in the number of fruit sets.

Therefore, in view of the problem of low fruit set of young trees, the quantity and quality of fruit set of young trees can be improved through proper management and pruning, strengthening tree strength, and controlling pests and diseases and adversity.