When pruning walnut trees in spring, it is mainly to prune the trunk branches, cut off the branches and apply carbendazim for sterilization, so as to promote the growth and development of the lateral branches of the plants and facilitate the flowering and fruiting of the plants. At this time, sufficient light should be given to accelerate wound healing and inhibit excessive growth of plants.
When pruning walnut trees in autumn, it is mainly to cut off the branches that have blossomed and borne fruit, and cultivate the healthy branches that have not borne fruit as the new trunk, which is conducive to better flowering in the next year, enhancing the growth trend of plants and promoting the differentiation of mixed buds.
Attention should be paid to the pruning of walnut trees:
1 First of all, circular sawing can weaken the growth of big branches, promote the growth of small branches, and help fill the space of exposed parts. General thickness 10cm saw once, thickness 15cm saw twice. It should be noted that when sawing, the spacing should not be too narrow and the kerf should not be too deep, which will cause the branches to dry up;
2. Then pinch the branches, mainly to pinch the wrong growth direction to a large space, which is conducive to increasing the light and ventilation of the walnut tree. Mainly for the branches below 10cm, pull them down to the required position during the growth and development, and you can use a stick to support the rope to help;
3. Finally, thinning the branches and cutting the tender tips is beneficial to promoting the branch fruiting. Walnut trees should be thinned, so that new branches can grow to fill the space without branches and avoid the phenomenon of piling up into holes; Pruning also promotes branching, mainly pruning branches without lignification.