Seedling raising method of Forsythia suspensa

Forsythia is a deciduous shrub, flowering first and then leaves, golden flowers are beautiful and lovely. The fruit is oval and the seeds are winged. Like light and shade, can withstand-50 ℃ cold, drought and barren, but afraid of waterlogging. The techniques of raising seedlings are introduced as follows.

First, sowing and raising seedlings

The main results are as follows: 1. Seed collection and bud treatment after harvest, the fruit is spread out and preserved without wings. The weight of 1000 seeds is 4.5g, the sowing rate is 100g / 10m 2, and the seedling yield is 3000 plants / 10m 2. The seeds were treated in early April, sterilized with 0.5% potassium permanganate solution for 3 hours, soaked in 30 ℃ warm water for 48 hours, mixed with 3 times of river sand, and placed in 10 ℃ to 20 ℃ room. Turn frequently, keep the humidity of the sand 60%, and the grinning seeds account for 1 / 3 of the sowing after 40 days.

2. Make a bed and sow a dry and drained plot of land, and make a bed that is 10 meters long, 15 centimeters high and 1 meter wide. Every 30 jin of bed soil was mixed with 5 grams of pentachloronitrobenzene and 5 grams of Dyson zinc to make medicinal soil. Lay a layer of medicinal soil before sowing, cover the soil after strip sowing or sowing, and the thickness is 3 times the diameter of the seed. Compacted and watered thoroughly, again with grass ether that blocks the sprouts of weeds, without watering for 10 hours.

3. Seedling stage management and keeping the bed moist after overwintering sowing, timely loosening soil and topdressing, the height of seedlings in the same year can reach 60 to 90 cm. After defoliation, the seedlings were graded and pseudo-planted before freezing, and the big seedlings were cultivated in ridges during afforestation with top pulp in the next spring.

Second, cuttage seedling

1. Select strong 1-2-year-old branches free of diseases and insect pests. The ear is 10 to 15 cm long, 0.3 to 1.5 cm in diameter and 1 to 2 strong buds at the top. The cut is smooth and the lower end is cut into a 45-degree slope. Before the sap flows in late autumn and early winter or early spring, cut with picking, then buried in sand, and cut in July.

2. Make bed and cuttage to raise seedlings with the same seed. Fill the bottom of the bed with hot material 20 cm thick, fill the bed soil and matrix 20 cm thick, hold flat and pour water thoroughly. Soak the cuttings in clean water for two days before cutting, and then soak the roots with ABT rooting powder 50ppm for 2 to 4 hours. Insert distance 10 15 cm, depth 6 to 10 cm, then pour water thoroughly.

3. After setting up the shed and the management, build a small arch shed with a height of 60 cm, and cover it with plastic film. Irrigate once every 1 to 2 days, keep the bed moist without stagnant water, humidity 70% to 90%, ground temperature 23 ℃ to 24 ℃, temperature 25 ℃ to 28 ℃, about 20 days after spitting leaves to take root. During this period, weeds should be removed, soil loosened and fertilized.

3. Striping seedling raising

Select strong branches in early spring, dig a pit 20 centimeters deep, scrape the branches and press them into the pit, bury the soil and water it. After the branches take root and extract new seedlings, they are truncated to form new plants.

4. Separate roots to raise seedlings

In early spring, the soil was loosened and fertilized and watered in the periphery of 70 cm under the crown, so that the surface roots sprouted and new plants appeared. After artificial tending, the seedlings to meet the greening standard were cultivated. The method of striping and root-splitting is generally used less.