Cutting and Rapid Propagation of Euonymus tomentosa

Euonymus tomentosa is evergreen all the year round, strong adaptability, very resistant to pruning, is a good hedge material, easy to shape and anti-pollution, is one of the indispensable evergreen tree species for urban greening in northern China. Its seedling rapid propagation technology is particularly important, rapid propagation is mainly cuttage, tender wood cutting, the survival rate is more than 96%.

1. The nursery facilities and inserting bed are made of bricks and cement to form a seedbed with a height of about 20 centimeters and a width of 1 meter, with a matrix of 18 centimeters thick, with coarse sand 5 to 8 centimeters thick in the lower layer and fine sand in the upper layer. Set up a water pipe at a height of 50 cm from the bed, and install a centrifugal or four-body sprinkler every 1.5 meters for spray. Before cutting, the seedbed was disinfected with 0.3% potassium permanganate solution.

two。 The materials were collected and treated to cut the middle and upper part of the crown, disease-free and sturdy annual semi-lignified or completely lignified branches on the excellent young mother plant of Euonymus tomentosa. Sprinkle the branches immediately after picking to prevent water loss and wilting. It is best to combine cuttings with pruning, cutting the cut branches to grow 10-15 cm ear segments with no less than 2-15 cm buds per cuttage, remove the basal leaves and retain the upper 1-2 leaves. The upper notch of the cuttings is cut flat at 0.5-1cm above the bud, the lower cut is at 0.5 cm below the node or 0.5 cm below the petiole, the cut should be smooth, no sprouts, no cracks, no skin damage. After cutting, the cuttings were bundled according to the thickness and thickness, and then treated in time or cut directly. The cuttings can be quickly dipped in ABT rooting powder solution for 5 seconds for 10 seconds to promote healing and rooting.

3. Cutting and cutter management big-leaf Euonymus tomentosa can be cut all the year round. Cuttings in spring, summer and autumn need to build a small arch shed, and summer cuttings should also build a shade shed on top of the small arch shed. If it is cut in early March, it can be transplanted in the same year. The cuttings from late September to late October were transplanted early after the soil was thawed in the following spring.

Cuttings can be quickly dipped in forbidden acetic acid solution or cut directly before cutting. The cuttage depth is 2cm 3 of cuttings, and the cuttage density is 60000plants / m2. After cutting, 800-1000-fold carbendazim solution was sprayed through the substrate. Spray immediately after the nursery bed is full, spray twice every morning and afternoon, once every half an hour at noon, 5: 10 minutes each time, hot summer should increase the number of sprays according to the situation, in order to lower the temperature. One week after insertion, calli can be produced, and about 20 days later, 90% of them will produce new roots. After rooting, attention should be paid to reducing the number and time of spraying to prevent rotting roots, and 0.2%-0.3% urea or compound fertilizer should be sprayed to carry out extra-root topdressing to promote the robust growth of cutting seedlings.

4. After 15-20 days, the seedling cuttings began to take root, and after the cuttings formed a more complete and full root system, the times of water spraying were reduced and the times of ventilation were increased. After 10-15 days, the plastic greenhouse film was gradually removed, and then the shading net was gradually removed after 10-15 days. The seedlings can be transferred and planted after staying in bed for more than 20 days. When transplanting, the root system should be kept intact as far as possible, and watered with planting to ensure the survival of transplanting. By using this method, the seedlings of Euonymus tomentosa can be propagated three times a year, which can greatly shorten the breeding period and improve the quality of seedlings.

In addition, the bed weeds should be pulled out in time. When the soil is too hardened, a small shovel can be used to loosen the soil gently in the gap between the rows, but it is not easy to be too deep to avoid injury at the base of the cuttings and affect the growth of the root system.