The method of asexual propagation of Schisandra chinensis-green branch split propagation rootstock

The culture of green branch split propagation rootstock refers to open field direct seeding. If the rootstock is not dug up before winter, it must be pruned before freezing. Leave 3-4 buds for each rootstock, cut off about 5 cm, and then pour enough frozen water to prevent freezing and draining. If the rootstock seedlings are to be planted in the second year, the seedlings can be dug out of cellar or ditch storage, which is more beneficial to the management of rootstock seedlings, and 3 or 4 buds need to be cut and dried in the second year. After thawing in the coming year, the rootstock seedlings overwintering in situ should be irrigated in time and topdressing with available nitrogen fertilizer to promote the growth of new shoots, leaving 1 or 2 new shoots per plant, and all the others should be removed, especially the underground walking stems germinated at the base. Grafting with rootstock seedlings can be carried out according to the general seedling planting method, and ridge planting can be used for the convenience of grafting.

In the north-central part of Liaoning and Jilin, it can be carried out from late May to early July, but when the grafting is late, the branch is short in the same year, especially in the area with short growth period, it can not be fully mature in the same year, so it is suggested that it should be grafted early in time. When grafting, it is best to choose cloudy days, rain after grafting is more ideal, and sunny days with strong sunshine are more suitable for grafting in the afternoon.

When grafting, select the strong growing new shoots on the rootstock, the length of the new shoots should have two leaves, the cut is about 1 cm from the base of the uppermost leaf, and the leaves on the rootstock remain. In order to heal better, to minimize the damage to the cells at the cut of the rootstock, the scissors should be sharp, or one-sided blade can be used to cut off.

Scions should choose new and sturdy shoots and secondary shoots of excellent varieties or strains. After cutting F, remove the leaves and leave only the petiole. Scions had better be picked and used. If long-distance transportation is needed, cooling, moisturizing and fresh-keeping should be done well to improve the survival rate. During grafting, 0.5 cm is left on the bud, 1.5 cm is left under the bud, and the lower end of the scion is cut to 1 cm left.

The right double bevel is wedge-shaped, the bevel should be smooth, and the angle is small and uniform.

Split a notch in the middle of the rootstock, carefully insert the scion, align the cambium of the scion and the rootstock, align it to one side when the thickness of the scion and rootstock are inconsistent, and leave about 1 mm on the cutting surface of the scion, which is beneficial to healing. After that, the interface was tightly wrapped with a plastic film about 0.5 cm wide, exposing only the petiole and axillary buds on the scion. In the case of drought, the interface at the top of the scion is easy to survive due to water loss, and the top can be capped with plastic film.

Attention should be paid to the grafting process: the rootstock should be fresh and tender, and the survival rate of the excessively lignified rootstock is poor; the semi-lignified branches of the scion should be selected, which is beneficial to survival; the plastic film at the interface must be tied up, and the seam should not be leaked, but it should not be too tight; before grafting, especially after grafting, the soil should be fully irrigated and the soil moist should be kept; the lateral buds and transverse stems from the rootstock should be removed repeatedly and in time after grafting. Remove the plastic film timely after receiving work.