What are the conditions for apple trees to form flower buds?

We must pay attention to the temperature, the temperature should be controlled at 25 degrees to 30 degrees, the bottom fertilizer should be sufficient, and the field management should be strengthened, the density of planting should be paid attention to, and the pre-cold work should be done.

Environmental reasons, bud differentiation reasons, nutritional reasons, apple tree growth reasons, light reasons, pesticide reasons, watering reasons.

Only the flower bones on the apple tree represent the apple flower bud differentiation stage, and the flower bone differentiation of the apple tree is divided into the third stage, namely physiological differentiation, morphological differentiation and sexual organ formation.

The flowering period of apples varies greatly depending on the climate. Generally in April and May, apples have 3 or 7 flowers per flower bud, and the center flower blooms first. Apples are cross-pollinated plants, and most varieties cannot bear fruit on their own, and the proportion of various fruiting branches varies depending on the age and variety of the tree.

Usually young trees have more long fruit branches and medium fruit branches, with the increase of tree age, the proportion of short fruit branches increases rapidly, and to the full fruit stage, generally up to more than 70%, the senescence period is almost completely short fruit branches.

What is the growth cycle of apples?

1. Seedling growth:

The growth period of apple seedlings needs to be carefully maintained, and reasonable water and fertilizer management should be carried out to make them grow quickly.

2. Flower bud differentiation:

After the seedling growth period, the apple begins to differentiate its flower buds and enters the flowering stage. At this time, the temperature and light should be ensured, and it is best to control the temperature at 12-18 degrees.

3. Apple flowering period:

Apples should be watered before flowering, and after flowering, they should be stopped to prevent the flowers from falling, and the buds should be thinned in time.

4. Physiological fruit drop period:

This period generally occurs in June, and it is necessary to do a good job of maintenance work to ensure nutrient absorption and avoid a large number of fruit drops.

5. Fruit expansion period:

When apples enter the fruit expansion stage, they need to be replenished with nutrients in time, apply phosphorus and potassium fertilizers, and prune them properly to make them grow better.

6. Maturity period:

During the ripening period of apples, it is necessary to correctly manage water and fertilizer, prune and maintain, supplement fertilizer and water, and do a good job in the prevention and control of pests and diseases.

Since flower buds are formed by the differentiation of leaf buds, it is difficult to distinguish between the initial stage of flower buds and leaf buds. In the past, it was thought that the base of the young shoots was more enlarged than flower buds, but now it seems to be unreliable. According to the anatomical observation of young shoots, the apical part of the axillary bud primitive body of each young bud will always develop into a leaf bud in the future, and only the axillary bud primitive body on the scales may develop into a flower bud in the future, so the young bud is a mixed bud.

Flower bud differentiation is basically over from mid-June to late August. The flower bud has a long stalk, the growth cone is relatively rounded, and the leaf primordium is underdeveloped, located at the base of the young bud. The leaf buds are not stalked, the growth cone is slightly pointed, and there are 3 7 original leaflets, located at the top of the young buds.

The apical buds are generally 1 3, more than 5, the middle one is a leaf bud, and the rest are flower buds. If there is only 1, it is a leaf bud. The leaf buds are thin and long, and the flower buds are round and fat.

During the development of flower buds, the leaf buds are latent, and sometimes the leaf buds shrink and fall off due to the strong development of flower buds. If the nutrients are abundant, the leaf buds and flower buds develop at the same time; If the nutrients are insufficient, the leaf buds are inhibited by the flower buds. Therefore, when the flower buds are formed, strengthening the fertilization management of Camellia sinensis can promote the formation of flower buds.

The flower buds are generally plump, full, and firm when squeezed by hand. The leaf buds are slender and soft-shelled, not full.

Trimming Method:

1. There are many flower buds in apple trees, so in order to reduce flower buds and improve ventilation and light transmission conditions, they should be thinned or retracted.

Improper return to the auxiliary branches and large trunk branches. Thinning of overly dense fruiting branches or groups of fruiting branches. The peripheral extension branches should be cut at the full buds, and the annual lengthy branches below should be appropriately thinned.

The inner bore annual development branches, except for the extra-long stubs, are generally lightly pruned or not pruned, so as to form a certain number of flower buds for the small year.

2. Reduce flower buds and increase reserve branches. In winter, the fruit branches are re-pruned, the branch groups are renewed, the medium and long fruit branches are shortened, the proportion of leaf buds is increased, and the flower is exchanged for flowers, so as to form a sufficient number of flower buds for the next year. When there are too many flower buds, it is necessary to rejuvenate a group of senescent short fruit branches and branches.

After pruning, the ratio of flower buds and leaf buds is mastered at about 1 3.

3. There are many flower buds in apple trees, which are not easy to distinguish in winter, and can be re-cut when the flower buds are swollen in spring. Remove excess flower buds so that the new year is not too big.

4. For apple trees with strong growth potential, in the case of leaving more fruits, from late May to early June, the base of the central stem or part of the large branch can be circumcised once to promote the formation of flower buds.

5. For the annual development branches and varieties that are easy to become flowers, the long branches can form flower buds in the current year, and they should be put more and cut off less, so as to lay the foundation for the next year. For varieties that are not easy to form flower buds, it is not easy to form flower buds in the year of long branches, and it is generally necessary to continue to bloom for 2 years, and it can only flower and bear fruit after three years. The strong branches that have been in the small year for a year should be continuously grown to promote the formation of flower buds and bear fruit in the small year.

Flowers are developed by flower buds.

bai. When the roots of a flower du seedling zhi

The stems and leaves grow to a certain size.

DAO is small, and all parts of the organ have matured, and the whole body begins to move from the vegetative growth stage to the reproductive growth stage. At this time, some of the buds undergo qualitative changes, forming a number of small protrusions, also called flower primordium. The process by which these flower primordiums are further developed into flowers is called flower bud differentiation.

Flower bud differentiation is generally carried out in the order of calyx, corolla, stamens, and pistil.

It is very important to touch the branches on the spine of the apple tree in May, and teach you a way to let it form flower buds right away!

Hello, I am glad to answer the question of how the branches of the apple tree can form flower buds from the new growth points (long, medium and short shoots) of the current year, and before germination in the next year, as long as the conditions are suitable, they can be differentiated into flower buds at any time. However, there were two periods of concentrated differentiation in a year, which appeared after the spring shoots stopped growing in June and July, and after the autumn shoots stopped growing in August and September. In the early stage, it is mainly the flowering of short branches and some of the top buds of middle branches, and in the later stage, it is mainly the flowering of autumn shoots (including axillary flower buds), and the flowering of short branches and apical buds promoted by pulling branches and taking branches in autumn.

Dear, I'm glad to answer for you, can the new apple tree branches form flower buds back then: yes. But to grow slowly, the prerequisites for the formation of flower buds of the apple tree.

When the apple tree is planted for three or five years, it enters the stage of sexual maturity, at this time the fruit tree has also reached the leaf area required to form flower buds, which can meet the needs of photosynthetic product accumulation, and the lignification of the branches has also reached the required level, and the vegetative growth and reproductive growth can be in a balanced state. <>