Planting methods and matters needing attention of Mantianxing, early nitrogen fertilizer and late phosphate fertilizer

Temperature: Mantianxing is resistant to shade and cold, likes to be warm and humid, and it is best to keep the daily temperature at about 10-25 ℃. Light: light directly affects the number of flowers. Soil: fertile humus soil can be selected with good air permeability and water permeability. Moisture: in accordance with the principle of no dry, no watering, watering thoroughly. Fertilizer: nitrogen fertilizer in the early stage and phosphorus fertilizer in the later stage. Attention: pay attention to fertilization, watering, pruning, basin soil replacement, reproduction and pest control and other aspects.

First, the planting method full of stars

1. Temperature

The sowing time is suitable from spring to early autumn, and the daily temperature should not be kept at about 10-25 ℃. If the sunshine is too long, it is easy to grow deformed flowers. The night temperature of 10-15 ℃ is the best. When the temperature is below 10 ℃ in autumn and winter, the stars are easy to cluster or dormant.

2. Lighting

Stars all over the sky are shady and cold-resistant, and like a warm and humid environment. Light has a direct impact on the number of flowers, especially in winter, so it is necessary to strictly control the light. The more light the star plants in the sky, the more flowers will bloom. The 80-24Klux illuminance can basically bloom in summer, but it needs to reach about 58Klux illuminance in winter. According to the summer standard, even if the plant is illuminated continuously for 24 hours, it can not make the star blossom.

3. Soil

Artemisia mandshurica is a kind of perennial herb, which is very suitable for living in fertile soil with a lot of humus. The air permeability and water permeability of the soil are more suitable for breathing at the root of the star.

4. Moisture

Because of the high temperature and humidity in summer, it is often difficult to control the standard of moisture, which has often become a major problem in the cultivation of Euphorbia angustifolia. Following the principle of "dry and wet, dry, dry and watered", Mantianxing needs sufficient water supply at the seedling stage, especially after picking the heart, so that the plant can better transition from the growing period to the growing period, which is what we commonly call the flowering period. Until the floret spike grows into petals, the amount of water can be slightly reduced, which can not only prevent the decrease of cut flower quality and water extraction, but also make the star blossom faster. Note that the full star can not accumulate water for too long, it will lead to rotting roots.

5. Fertilizer

Mantianxing has high requirements for water and fertilizer, adhering to the principle of "light fertilizer applied frequently, less and more times, and complete nutrition". After fertilizing, don't let the stars get wet at night, keep the leaves and flowers dry. After planting, topdressing was used by stages, nitrogen fertilizer was applied in the early stage, and phosphorus and potassium fertilizer was used in the later stage. Avoid random fertilization, concentrated fertilizer and partial application of nitrogen, phosphorus and potassium fertilizer.

Second, matters needing attention of the stars

1. Spread fertilizer

Due to the weak plant type, avoid applying thick fertilizer, we should follow the principle of frequent application of light fertilizer, less and more times, no dry and no watering, and watering thoroughly. Dilute the tomato fertilizer containing phosphate with water and top-dressing the whole star every two weeks or so.

2. Watering key points

During the period of flower and seedling, especially in summer, there is more demand for water, and more water and more fertilizer should be applied after picking the heart.

3. Pruning essentials

The aged leaves should be pruned in time, and they will soon be full of new ones. The star grows strong, and the more old leaves are cut, the more new leaves will grow. In autumn, it is necessary to build the whole plant full of stars in order to maintain its beautiful shape.

4. Replacement of basin soil

The selection of fresh soil can keep the basin soil moist, and the fertile sandy soil can appropriately increase the space in the basin, which is conducive to the healthy growth of the rhizome. Generally change the basin soil in the spring, because the star is growing very fast, so every year to give it a bigger basin. A well-developed root system can also keep it growing well and promote flowering.

5. Main points of reproduction

(1) sowing: it is suitable to sow seeds for the stars from autumn to early spring. The optimum temperature for growth was 10 ℃-25 ℃. Flowering period: may-July. Raising seedlings: sowing in September, first put suitable loose soil in the basin, and then slightly cover a layer of fine soil. The seeds germinated in about 10 days and moved to the nursery bed with suitable seedling growth temperature before entering winter. Cultivation: the following spring for transplanting with soil, picking the heart after planting is the most critical, which can promote the growth of too many branches and hinder the growth. When the seedlings grow to about 20cm, they can be watered appropriately. It blossoms in the middle and late May, and this species can be planted and sown before freezing in November or in early spring.

(2) Cuttage propagation: cut the old hard branches of 13cm in spring and insert them into the sand bed, wait for about a month to grow roots. Or choose the rainy season to use the top twigs of the same year for cutting, about 2-3 weeks to take root. Pay attention to the temperature control should not be less than 15 ℃, humidity above 95RH.

6. Disease and pest control

The main results are as follows: (1) the occurrence of leaf spot disease needs to be sprayed with 600 times of Dysen zinc wettable powder in time, which can improve the disease and prevent the disease from spreading effectively.

(2) if diseases and insect pests occur, aphids are diluted with essential oil or neutral washing powder; red spiders are sprayed with 1000 times omethoate EC; and for snails, Weiling granules can be sprinkled in the basin soil.

(3) when breeding all over the sky, we should also pay attention to the occurrence of diseases. Especially in the rainy season, the stars often accumulate water and appear Phytophthora. In the event of occurrence, the root should be irrigated with green cream copper EC or 800 times liquid of Gen Fuling in time.