Technical principles of Flower and Fruit thinning of Pear

Flower thinning and fruit thinning is to regulate the flowers and fruits of trees with more flowers or excessive fruit setting on the basis of winter pruning; this is a means to achieve reasonable load; its main functions are: one is to overcome the size of the year, stable production and stability; the second is to ensure that the fruit of the year is large and tidy; the fruits left on the trees develop into qualified high-quality commodity fruits, with fewer residual fruits; and the third is to form a sufficient number of flower buds for the next year and maintain strong vigor. Trees with no thinning or excessive fruit are easy to appear in big and small years.

The essence of big and small year is that fruit and flower bud compete for nutrition. Fruit expansion peak period, also is the flower bud differentiation peak period, fruit than bud competition nutrient ability is stronger; In addition, fruit more, the formation of more seeds, nutrients are almost all fruit competition, buds do not get enough nutrients, can not form flower buds, will inevitably lead to the next year is a small year. Moreover, when there are too many fruits, the fruit and fruit ask, nutrients scattered, shortage, fruit can not increase, must have a high rate of small fruit. Therefore, thinning flowers and fruits and reasonable load are important measures related to two-year yield and quality.