Bitao is an indispensable ornamental tree in early spring in the northern gardens. Its tree posture is graceful and the flowers are charming and the viewing effect is very good. However, its strong growth, many branches, canopy closure, resulting in excessive consumption of nutrients, poor ventilation and light transmission, is not conducive to shoots and flower bud differentiation. Therefore, it is necessary to timely pruning and pruning, especially during the production period trimming (also called summer shear), which plays an important role in the cultivation and management of blue peach.
Summer cut can reduce ineffective growth, save nutrients, can improve light conditions, strengthen the synthesis of nutrients, can adjust the opening angle of the main branch to balance the tree potential, thus promoting the full shoot buds full of flower buds. Proper and timely summer pruning not only lays the foundation for winter shearing, but also reduces the amount of pruning in winter. It can be said that summer pruning plays a decisive role in the early formation of the beautiful posture of Peach.
Peach's summer pruning often uses techniques such as wiping buds, removing sprouts, picking hearts, twisting tips, and pulling branches.
1. Trimming buds and removing germs are in time to erase the buds in the canopy, the back buds on the branches, the competition buds under the cuts, and the buds on the upper branches of the flowers. In addition to the strong tip of the tree left weak tip. By this method, it is possible to reduce useless shoots and shoots, save nutrients, improve light, and reduce the number of wounds caused by thinning during winter cutting.
2. Picking up is to remove a small shoot at the top of the shoot. Through topping, it is possible to control the growth of the shoots and to promote the formation of relatively full flower buds in the lower part of the shoots. In the early stage of shoot growth, picking up the heart can also promote the early sprouting of the shoots, so that the shoots can differentiate into fuller flower buds.
3. The tip of the spine twists the upper half of the non-lignified and upright limbs 180 and squats in the lower half of the leaf (note to prevent it from re-warping). By this method, the growth direction is changed, the growth is controlled, and the transformation is promoted into flowering fruit branches, and at the same time, the effect of improving the illumination is also achieved.
4. The pull branch is about to open and fix the main branch or lateral branch according to the required angle of the branch. The most suitable opening angle is about 80. If the angle is not opened, it is easy to appear “strong and weak†and it cannot be bowed. Otherwise, it will pick up branches in the curved part. By "pulling branches," it is possible to ease the tree potential and prevent the "light foot" phenomenon in the lower branches. Generally, large branches with more than three years of growth can be carried out from May to September. The main branch of saplings must be opened from June to July.
Prunus persicae's pruning is often based on variety, age, tree vigor, and weather conditions. The time and number of pruning should be combined with the actual conditions of the cultivated land, usually after flowering until around August, and can be trimmed from 2 to 5 times.
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