Controlling the emergence of new branches and leaves of longan trees in winter is also one of the important links of management. If fruit trees grow new branches and leaves in winter, it will be difficult to blossom and bear fruit next year. The specific technical methods for controlling the sprouting of new branches are as follows:
1, ring cutting method. From mid-June165438+February to mid-June 65438+February, cut the trunk or first-class branches with a sharp knife. The vigorous tree is cut once, and the ordinary tree is cut 3/4 times. The cutting depth reaches the xylem and the width is about 0.3cm.
2. Rooting method. It can be combined with deep excavation and soil improvement in the middle and late June and February of 5438. That is to say, in the rhizosphere of crown, the tillage 15 ~ 20 cm should be cut off properly to reduce water supply and control the appearance of winter shoots.
3. Drug control. After longan leaves turn green in the first half of June 1 1, spray bud tips with 40% ethyl ester 10 ~ 15 ml water 15 kg. Avoid repeated spraying on the same crown or spraying on the whole tree or spraying within one month, so as not to cause the leaves to turn yellow and fall off, which will lead to the decline of tree potential.
Extended data:
Pruning of longan trees in spring and autumn
1, spring pruning
The purpose of spring pruning is to form a good crown shape. Pruning should be combined with thinning flowers and fruits, mainly with light pruning to maintain good permeability between branches.
2, autumn pruning
Autumn pruning is mainly to maintain the shaping and pruning of the crown. Prune the overgrown branches and prune the weaker branches in the crown. Trim stubble, diseased branches, insect branches, disorderly branches, dense branches, old branches and dead branches. After picking the fruit, enhance the permeability of the crown, adjust the fruiting branches and cultivate the prepared fruiting branches. .
Baidu encyclopedia-longan
Baidu encyclopedia-longan tree