Methods to regulate and control the flower bud differentiation of pear trees: By adopting reasonable cultivation techniques, reasonably controlling environmental conditions, changing the nutritional conditions and endogenous hormone levels of trees, and balancing the growth and development relationship among various organs of pear trees, the number of flower buds can be controlled, the normal differentiation of flower buds can be realized, and the flower buds with sufficient quality can be ensured.

Such as pruning (girdling, bud cutting, branch pulling, etc. ), water control and fertilization (applying nitrogen fertilizer before flower bud differentiation in autumn), etc. ), using plant growth regulators (2,4-d, ethephon, etc. ), thinning flowers and fruits to prevent premature defoliation.

Specific methods of accelerating pear bud differentiation;

1, do a good job in summer pruning and improve the lighting of the canopy hall;

2. Appropriate drought in late June is beneficial to flower bud differentiation;

3. Spraying 300 times of potassium dihydrogen phosphate on leaves can improve the nutritional level of trees and promote flower bud differentiation.

Extended data:

The process of flower bud morphological differentiation in pear trees can be divided into five periods, namely, flower bud differentiation initiation period, calyx emergence period, corolla emergence period, stamen emergence period and pistil emergence period. As far as a flower bud is concerned, the time to start flower bud differentiation is related to the time of flower bud entering and going through qualitative change, external environmental conditions, internal nutritional conditions, species and variety characteristics.

Generally speaking, the later the branches stop growing, the later the flower buds begin to differentiate. The flower bud differentiation of new shoots with the same length is related to the leaf area and the nutritional status of subordinate mother branches. The larger the leaf area, the earlier the flower bud differentiation. The flower buds of short branches differentiate earlier than those of medium and long branches.

As far as the whole plant is concerned, flower bud differentiation lasts for more than 3 months. When young fruits begin to grow rapidly, flower buds begin to differentiate. When the young fruit expands rapidly, the flower buds enter a large number of differentiation stages, and most of the flower buds have been formed when the fruit is harvested. Different species and varieties have different flower bud differentiation sooner or later.

References:

Baidu encyclopedia-pear tree