Ligustrum lucidum by tender wood cutting

Ligustrum lucidum by tender wood cutting

Ligustrum lucidum is a small shrub of Oleaceae Ligustrum lucidum. The primary leaves are golden yellow and the old leaves are green, glossy, adaptable and extensive in management. it is a common tree species in landscaping at present. In this paper, the softwood cutting propagation technique of Ligustrum lucidum is briefly introduced.

First, select land preparation plots that are loose and fertile, flat and well drained, apply 125 kg of calcium superphosphate per mu, turn 15 cm deep and then fine rake flat to make a high border 1.2 meters wide and 20 cm deep.

Second, the choice of cuttings should first choose a good mother tree. generally speaking, the older the tree is, the more difficult it is to take root. Therefore, cuttings should be collected from young mother branches, and it is best to use semi-lignified branches in the same year to improve the survival rate. After the cuttings are collected, they should be placed in a cool and wet place or wrapped with wetting materials to avoid water loss, and cut them into cuttings so that they can be cut along with the cuttings, cutting and cutting. The length of cuttings should be 5 to 20 cm, leaving 2 to 3 leaves. The upper end of cuttings should be cut flat at 2 cm above the bud, and the lower end of cuttings should be cut into oblique incisions. The cutting methods include single bud cutting, double bud cutting and multi-bud cutting. Single bud cuttage: cut into one bud node, leave leaves on buds, remove leaves under buds; double bud cuttings: cut cuttings into two bud nodes, leave two buds in the upper part, and remove leaves under buds; multi-bud cuttings: cuttings are cut into three bud nodes, leaving two bud nodes in the upper part, leaves with three buds in the upper part, and leaves are removed from the lower bud.

Third, the cutting method softwood cuttings should be carried out when the new shoots grow slowly, that is, from June to September, preferably in the rainy season. Because the air humidity is high in the rainy season, it is beneficial to the cuttings to take root. In general, a single bud should be inserted into 1/2 of the length of the branch, and double buds and multiple buds should be inserted into the upper leaves. Do not insert too deep, the density between the cuttings do not squeeze each other, overlooking you can see the base of the cuttings is appropriate.

Fourth, strengthening the management of softwood cuttings requires higher air humidity and suitable substrate water content, and proper shading is very necessary. Excessive sunlight will increase the temperature of the inserting bed and reduce the humidity, which is not conducive to the survival of the cuttings. Reed curtains, bamboo curtains and sunshade nets can be used to shade, and the shading intensity is generally about 70%. The temperature of seedbed substrate should be controlled in the range of 22 ℃ to 28 ℃. Under this temperature, cuttings are the easiest to root.

How to improve the cuttage survival rate of Ligustrum lucidum

The golden leaf color of Ligustrum lucidum and its pruning resistance make it widely used in landscaping. It is very important to improve the survival rate of cutting in order to propagate Ligustrum lucidum in large quantities. Now we will introduce many years of cutting experience for your reference.

Using new shoots of two-year-old Ligustrum lucidum, it is best to cut the lignified part into cuttings of about 15 cm, remove all the lower leaves, leave 2 to 3 leaves in the upper part, cut flat 1 cm away from the upper bud, and cut the lower cut obliquely into a horseshoe shape on the back of the bud. The cutting substrate is disinfected with coarse sand and 0.5% potassium permanganate solution for one day, and then used for cutting. before cutting, a stick thicker than the cuttings is used to punch holes, and after cutting, the cutting density is not in contact with each other, and the distribution is uniform. Spray water through the plastic film, press half of it tightly with soil, press the rest with bricks for spraying water, and then shade with Reed curtains. Spray water twice a day before rooting, 10:00 to 11:00 and 13:00 to 14:00 in order to cool and moisturize, keep the temperature in the shed 20 ℃ to 30 ℃ and the relative humidity above 95%. Properly ventilated at noon every day, in order to prevent its decay in summer, 800 times carbendazim was sprayed 3 days after insertion, and again 10 days later. About 21 days after insertion, after 2 days of small ventilation, the plastic film can be removed sooner or later, shaded by Reed curtains at noon, pay attention to spraying more water, and all of them can be removed 3 days later. The seedlings can be transplanted in cloudy days or in the evening after 4 to 5 days, and watered once immediately after planting, and again after 3 days, the survival rate can reach 100%, and a small arch shed is needed to overwinter in winter.

It should be paid special attention that the survival rate of cuttings is closely related to the substrate of cutting, the concentration of rooting powder, the degree of Lignification of cuttings and the time of cutting: the rooting rate of coarse sandy soil is higher than that of fine sandy soil, and the rooting rate of cuttings with 1/1000 solution is higher than that of low concentration. The rooting rate of cuttings with Lignification is higher than that of semi-Lignification, and the rooting rate of cuttings in summer is higher than that in autumn.