Artificial seeding propagation method of willow verbena

Willow verbena is widely used in landscape layout. Here is a case study of planting in Shenyang to talk about the sowing and breeding techniques of Verbena. Willow verbena is suitable for sowing in spring, blooming in summer and autumn, luxuriant flowers and long flowering period in Shenyang.

1. Selection and disinfection of acupoint plates

The shape size of the hole plate is 54.9cm × 27.8cm, the size of the hole plate is 200 holes, and the seedling transplanting plate is 32 holes or 50 holes. For the reused point plate, it must be cleaned, sterilized and dried before it can continue to be used. Disinfection generally put the acupoint plate into a 100-fold diluted bleach solution and soak it for 8-10 hours, then take out and dry it.

two。 Matrix material

The sowing matrix materials mainly include garden soil, peat soil, perlite, vermiculite, peat soil and so on. In the actual production, the formula is garden soil ∶ peat soil ∶ vermiculite or perlite with a ratio of 1 ∶ 1 ∶ 1. Fully mix the selected substrates and spray a small amount of water with a spray can while stirring, mixing evenly.

3. Matrix disinfection

Two methods of solar disinfection and chemical treatment are generally used. Daylight disinfection is to put the prepared seedling substrate on a clean ground or on a wooden board, spread a thin layer of 3~5cm evenly, and kill a large number of bacteria and pests after exposure to the sun for 3 to 15 days. The chemical treatment is to apply 50% carbendazim powder 40 g or 60% Dysen zinc powder 60 g on the substrate of 1m3, mix well and cover with thin film. Remove the film after 2 to 3 days and use it after the smell of the medicine evaporates. Potassium permanganate can also be used to disinfect, after the hole plate soil is installed, if the soil is dry, wet the topsoil with clean water first, if the soil is wet, omit this step, then dilute it to 400 × 600 times potassium permanganate, spray it evenly on the topsoil with a sprayer, and then cover it with plastic film and seal and expose for 3-5 days, then uncover the film and sow seeds.

4. Sowing seeds

Before and after sowing, fill the matrix into the hole plate, gently scrape off the excess matrix with glass or wood, do not compaction hard, so as not to destroy its physical properties. Hit the bottom one day in advance. When sowing, tweezers, toothpicks and other tools are used to gently press the seeds on the hole plate with the substrate, and the depth of the pressure is determined according to the size of the seeds, usually 1 ~ 3mm. Each hole 1 ~ 2, and then gently covered with a layer of fine soil, perlite or vermiculite, the cover is not easy to be too thick, it is appropriate to be flat with the small lattice. Spray water in time after sowing, spray to the bottom of the hole plate and water can seep out. After spraying, cover the plastic film to keep the soil moist. It is best to put some small bamboo strips on the hole plate before covering the plastic film, so that there is a gap between the film and the hole plate without bonding.

5. Seedling stage management

Remove the mulch in time after emergence to prevent overgrowth caused by too late uncovering of the film. Immediately after the development of cotyledons, the seedlings and transplanting seedlings are filled, and the redundant seedlings in a single hole are pulled out and moved into the hole without seedlings to ensure that there is a seedling in each hole, and the seedlings should be watered immediately after transplanting. After sowing to before germination, if the temperature is too high and timely ventilation, and timely replenishment of water, but the soil should not be too wet. About one and a half months after sowing, they were moved into large hole plates or nutrition bowls such as 32 points to grow. It was planted in the planting place about 3 months after sowing, and the seedlings needed to be refined before planting, that is, the seedlings were placed outdoors for exercise for 3 ~ 5 days, and they could blossom 1 ~ 1.5 months after planting. The florescence lasts as long as 2 ~ 3 months.

The above is all about the willow verbena, because of its spectacular effect, it is often used in sparse forests, botanical gardens and villas. So farmers who have ideas to understand can first come to Huinong Network to learn planting techniques.

The use of Willow Verbena the Culture method of Willow Verbena

Many people will easily mistake a whole cluster of willow verbena flowers for lavender fields, both of which bloom in a sea of purple flowers, but if you take a closer look, you will find that there is a big difference between the two flowers. Willow verbena has strong drought tolerance and simple planting management. nowadays, many parks like to plant a piece of willow verbena to decorate. If you have a small garden at home, planting a piece of willow vervain is also a good choice. Today, the editor will join you to understand the use of willow verbena and the breeding method of willow verbena.

The use of Willow Verbena

1. Willow verbena is a perennial herb of Verbenaceae. Erect, leaves dark green, clustered at base. The stem is erect, slender and tough. Inflorescence terminal, flowers minute, blue-purple, crown 60 cm in diameter, blooming in summer and autumn. Willow verbena swaying posture, delicate and beautiful colors, luxuriant and long viewing period, flowering plants can be up to 1.5 meters high, flowers are tall but not lodging, soft colors are especially suitable for configuration with other plants, the most suitable for flower border background material.

two。 Willow verbena is widely used in landscape layout. Because of its spectacular planting effect, it is often used in the landscape layout of sparse forests, botanical gardens and villas. The flowering season is like a pink-purple cloud.

3. In the courtyard greening, Verbena can be planted along the road, separating the courtyard space, but also enriching the roadside scenery. The lower layer of Verbena can be equipped with beautiful evening primrose, purple flowers, sedum, and so on. The effect will be better.

Culture methods of Willow Verbena

Habits: Verbena likes warm climate, the suitable temperature for growth is 20: 30 ℃, it is not cold-tolerant, it grows slowly below 10 ℃, it grows better in full sunshine, it will grow badly if cultivated in the environment of insufficient sunshine, it can blossom all year round, the flowering period is long, the ornamental value is high, it is better in spring, summer and autumn, but worse or no flowering in winter, it is not harsh to the soil selection, good drainage, strong drought tolerance. The water demand is moderate.

Propagation: culture can use sowing method, cutting method and root cutting method. The suitable temperature for sowing and germination is about 20-25 ℃, spring, summer and autumn, and about 1 month after sowing. Although sowing method can obtain a large number of plants in a short time, but the time from sowing to flowering is longer, so cutting culture is generally mainly based on cutting culture. Cutting is the appropriate time in spring and summer, and terminal bud is the best. Cuttings are very easy to root. The seedlings can be formed after cuttage for about 4 weeks.

Planting: 6 plants per square meter were planted with large and small ridges, large ridge spacing 60cm and small ridge spacing 40cm. To ensure that the soil conditions are good before planting, it is generally necessary to make equal preparations for watering, weeding, fertilization, ploughing and raking. After planting, water is poured through to ensure that the soil layer of 20cm under the soil surface remains wet. Willow verbena needs no pruning and has a strong ability to branch naturally. The flowering period begins one and a half to two and a half months after planting, and the full flowering period can last for two and a half to three months. Willow verbena is very drought-resistant, so it should be dry and wet in the process of maintenance. Verbena officinalis can survive the winter safely in the area above the lowest temperature O ℃, and is generally used for annual cultivation in the north of the Yangtze River.

Picking leaves: the proportion of hybrid broad-leaf verbena seeds is about 5%. During seedling cultivation, this type of seeds can not distinguish between broad leaves and narrow leaves, and only after planting and drawing out the main stem, the leaves growing from the branches on the main stem can distinguish between broad leaves and narrow leaves. Therefore, if the seed propagated verbena wants to eliminate broad-leaf miscellaneous plants, it must be carried out about one month after planting.

Brief introduction of Willow Verbena and its Culture method

Willow verbena is a perennial herb of Verbenaceae. Erect, leaves dark green, clustered at base. The stem is erect, slender and tough. Inflorescence terminal, flowers minute, blue-purple, crown 60 cm in diameter, blooming in summer and autumn. Willow verbena swaying posture, delicate and beautiful colors, luxuriant and long viewing period, flowering plants can be up to 1.5 meters high, flowers are tall but not lodging, soft colors are especially suitable for configuration with other plants, the most suitable for flower border background material.

Brief introduction of Willow Verbena

Willow verbena, perennial herb. The plant height is 100cm to 150cm. Cymes, tubular flowers borne on top of flower stems, purplish red or lavender. The leaves are willow-shaped, cross-opposite, the initial leaves are oval and slightly engraved, the leaves after the flower stem are high, such as the willow-like edge is still pointed, the stem is square, the whole plant is ciliated, the florescence is from May to September.

In the field, it will cross with some verbenaceae plants with spikelike flowers of the same genus, so there are often some intermediate plants with inflorescences between Cymes and spikes.

Culture method of Verbena willow

Environment

Verbena officinalis likes warm climate, the suitable temperature for growth is 20: 30 ℃, it is not cold-tolerant, it grows slowly below 10 ℃, and it grows better in full sunshine. If cultivated in the environment of insufficient sunshine, it will grow poorly, flowering all year round, long flowering period, high ornamental value, better flowering in spring, summer and autumn, poor or no flowering in winter, no harsh soil selection, good drainage, strong drought tolerance and medium water demand.

Cultivation

Verbena willow can be propagated by sowing, cutting and root-cutting ramets, and the time of sowing and flowering in spring is the longest. There are about 4000 verbena seeds per gram, and the germination rate is about 85%. The optimum temperature for seed germination is 20 ℃ ~ 25 ℃, and germinates 10 ~ 15 days after sowing. The whole seedling raising period is 40 ~ 45 days. It is better to sow in January, and it takes 3 to 4 months from sowing to flowering (from January to March, it takes 4 ~ 5 months to sow seedlings at low temperature and 4 ~ 5 months to flowering). Seedlings are usually raised with 200-hole hole trays to facilitate transplanting and planting, and the medium can use peat soil imported from Denmark to ensure that the seedlings are strong, neat and fast. It can not be transplanted until 45 days after sowing, when the true leaves reach 2 ~ 3 pairs and the roots are clustered. Pot seedlings are not recommended to go directly to the ground, because the initial growth rate is slow and the mortality rate is high. The nutrition bowl that is generally transferred to 9cm~12cm first grows for 2 months and then colonizes.

The row spacing of large and small ridges, 60cm of large ridges and 40cm of small ridges were used for planting, with 6 plants per square meter. In order to ensure good soil conditions before planting, it is generally necessary to make equal preparations for watering, weeding, fertilization, ploughing and raking. After planting, water is poured through to ensure that the soil layer of 20cm under the soil surface remains wet. Willow verbena needs no pruning and has a strong ability to branch naturally. The flowering period begins one and a half to two and a half months after planting, and the full flowering period can last for two and a half to three months. Willow verbena is very drought-resistant, so it should be dry and wet in the process of maintenance. Verbena willow can survive the winter safely in the area with the lowest temperature above 0 ℃. It is generally used for annual cultivation in the north of the Yangtze River.

Although the sowing method can obtain more plants in a short time, it takes a long time from sowing to flowering, so cutting propagation is also a good way. Generally, the terminal bud cuttage is the best in spring and summer, and the cuttage is very easy to root. seedlings can be formed about 4 weeks after cutting. The root cutting method is to cut the root system of the female parent at the beginning of spring.

In the process of cultivation of willow verbena, we should pay attention to some problems of broad-leaf verbena which have no ornamental value. Under normal circumstances, Verbena is narrow-leaved, but the common seeds of Verbena on the market are generally conventional species produced in China, because Verbena is a nectar plant, so it is easy to be pollinated by insects in the process of breeding. as a result, the hybrid seeds were crossed with Brazilian verbena, the leaves of the plants were wider, the inflorescences were between Cymes and spikes at flowering, the flowering period was short and the flower color was dark. There is little ornamental value. The proportion of hybrid broad-leaf verbena seeds is about 5%. During seedling cultivation, this type of seeds can not distinguish between broad leaves and narrow leaves, and only after planting and drawing out the main stem, the leaves growing from the branches on the main stem can distinguish between broad leaves and narrow leaves. Therefore, if the seed propagated verbena wants to remove the broad-leaf miscellaneous plants, it must be carried out about one month after planting. For example, when the planting density is high (about 16 plants per square meter), because the proportion of broad-leaf verbena is not high, the removal work can be ignored, and the overall landscape effect will not be affected after flowering. In addition, the broad-leaf verbena can be eliminated by terminal bud cutting. generally, the female parent of narrow-leaf verbena is selected for cutting from April to June, which takes root in one week and can be planted in one month.