Pruning of fruit trees is often carried out according to the principle of apical dominance in horticulture, and apical dominance refers to the phenomenon that the terminal buds of plants grow first and the lateral buds are inhibited. In agricultural production, the growth of crops, fruit trees and flowers is often controlled by eliminating or maintaining the apical dominance, and the apical dominance is often removed by topping, which can promote the germination of lateral buds and increase the number of lateral branches. It can also eliminate the top advantage by chemical agents, which can improve the yield of crops.

1. What principles are often used to prune fruit trees in horticulture

1. Pruning fruit trees in horticulture is often based on the principle of apical dominance, which refers to the phenomenon that the terminal buds of plants grow first and the lateral buds are inhibited. In the process of plant growth and development, there is a close relationship between the terminal bud and the lateral bud. When the terminal bud grows vigorously, it will inhibit the growth of the lateral bud, while when the terminal bud stops growing, some lateral buds will grow rapidly.

2. In agricultural production, the growth of crops, fruit trees and flowers and trees is often controlled by eliminating or maintaining the top advantage, which can achieve the purpose of increasing production and controlling the plant type of flowers and trees.

3. You can also make plants branch and blossom more by pinching and topping. Topping is often used to remove the apical advantage, which can promote the germination of lateral buds, increase the number of lateral branches and promote the growth of lateral branches.

4. The apical dominance can also be eliminated by chemical agents, which can increase the growth of lateral buds and increase the yield of crops. The effect of chemical apical removal is similar to that of pruning apical buds.

2. Pruning technology of cucurbit vegetables

1. Cucurbit vegetables can be pruned at the seedling stage. At this time, the tendrils on its vines can be cut off with scissors, so that the plants can avoid consuming too much nutrition, and then all the branches except the main vines can be cut off, so that the plants can lose nutrition to the main vines and promote plant growth.

2. Prune melons and vegetables at the vine-pulling stage. At this time, the plants have entered the flowering and fruiting stage. When pruning, all the redundant flowers and thin-growing fruits should be cut off, which can improve the quality of fruits.

3. Prune melons and vegetables before they fall. First, prune the old leaves, yellow leaves and insect leaves at the bottom of the vines, which can improve the ventilation between plants. After pruning, clean up the fallen leaves and weeds at the roots of the plants, which can avoid breeding bacteria.

4. When the vines of melon plants are slender, the whole branches should be handled with care to avoid breaking the vines, otherwise it will affect the normal growth of the plants. After pruning, carbendazim and plant ash should be applied to the wound to avoid the outflow of tissue fluid.