Prune the seedlings growing on the trunk and the seedlings growing on the roots of plants to reduce the loss of water and nutrients. Prune the branches in the dense growth area during the vigorous growth period, cut off all the side branches and leaves without new buds on the plant, cut the crown into an umbrella shape, and prune the withered, overlapping and drooping branches and leaves during the dormant period.

Elm pruning sequence

At the initial stage of the growth of Ulmus pendula, the seedlings growing on the trunk and the seedlings growing on the roots of plants were mainly pruned and cut off, so as to reduce the loss of water and nutrients during the growth of plants and promote the growth of plant lateral branches and leaves. At this time, it is necessary to maintain sufficient light to prevent plants from growing in vain.

In the vigorous growth period of Ulmus pendula, it is necessary to prune the branches in the dense growth area to improve the ventilation and light transmittance of the plant, which is beneficial to the normal photosynthesis of the leaves of the plant, and to cut off all the side branches and leaves without new buds on the plant, which is beneficial to the faster growth of the plant.

At the same time, the elm tree is pruned, the crown of the tree is pruned into an umbrella shape, the branches are pruned from the height of 30 cm of the plant, and the robust branches are cultivated into new trunk, leaving only 4-5 leaves at the top of the branches, which is beneficial to the better growth and germination of the plant in the next year.

During the dormant period of Ulmus pumila, the withered, delicate, overlapping and drooping branches and leaves on the plant should be trimmed in time, and carbendazim should be applied immediately for sterilization and disinfection, and the wound should be covered with plastic film to prevent bacterial infection or frostbite.