Management techniques of Flower Bud differentiation in Apple

Flower bud differentiation period refers to the process of fruit tree terminal bud and lateral bud turning to flower bud, and flower bud differentiation is the basis of apple flowering and fruiting, and it is the turning point of vegetative growth to reproductive growth, which is related to apple flowering and fruiting quality and late yield. So how to manage the apple flower bud differentiation period? Come and have a look with the editor.

I. time of apple flower bud differentiation

The main results are as follows: 1. The period of physiological differentiation: when the new shoots of fruit trees stop, or most of the short branches stop growing until most of the long branches stop growing, the time of breaking is called the period of physiological differentiation, which begins in late May at the earliest, and the peak period is from June to July. It can last until September-October, which is the key to control flower bud differentiation.

2. Morphological differentiation period: at this time, various floral organs are formed in the bud. Generally, from June to September after the new shoots stop growing, the number of flower buds is closely related to the growth of new shoots and the time when new shoots stop growing.

3. Sex cell differentiation period: it refers to the dormant period to pre-flowering period, which is mainly the differentiation and development of adulterate powder and ovule, which is closely related to the fruit setting rate.

2. Conditions for flower bud differentiation of apple.

Only the growth of buds brings you active but inactive branches, so that flower bud differentiation can be carried out, while inactive buds cannot do flower bud differentiation. If the growing point is too active, it will cause the new shoots to grow without forming flower buds, and with your inactivity, they will not be able to form flowers. Under the condition of sufficient nutrient accumulation in apple trees, this is extremely beneficial to the flower bud differentiation of fruit trees, and the suitable temperature for flower bud differentiation is above 20 degrees. In addition, strong light and sunshine are also beneficial to flower bud differentiation. Short-term control of water before the critical point of flower bud differentiation, inhibition of shoot growth, conducive to flower bud differentiation.

Third, the management technology of apple flower bud differentiation.

In the early stage, promote the growth of branches and leaves of fruit trees, pay attention to fertilizer and water management, which is conducive to the accumulation of photosynthates, fruiting trees can be fertilized before the critical point, mainly phosphorus and potassium fertilizer, control the application of nitrogen fertilizer, and humidity control water, but it can not be too dry. This is conducive to flower bud formation. It can also be sprayed with some agents to promote flower bud differentiation, inhibit the growth of new shoots and fruit moss shoots, accelerate the nutrient accumulation of branches, and promote flower bud differentiation. In addition, restraining the vigorous growth of autumn shoots will also promote the flower bud differentiation of fruit trees. the simplest way is to spray growth regulators, which can be sprayed once in May-June, with young shoots and leaves as the main spraying object. fruit trees with exuberant growth or fruit yield can be sprayed again in July as appropriate. At the same time, pruning during the growing period should be strengthened to promote the development of medium and short branches. pruning during the growing period is mainly for young trees with exuberant growth, mainly light pruning and balancing tree potential.

The above is the introduction of apple flower bud differentiation management technology, hope to help you, want to know more related knowledge, please follow us.