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Introduction of Peony Spring Flower

Cultivation Techniques

Introduction of Peony Spring Flower

Introduction of Peony Spring Flower
In the cold winter, peony flowering in sunlight greenhouses or plastic greenhouses is based on the growth and development characteristics of different peony species, and artificially regulates environmental factors to meet the requirements of peony growth and development at different stages. Hormonal regulation to achieve the purpose of expected flowering, the main technical points are:
I. Regulation of temperature and humidity
1. Initial management. The early temperature is 10-15 ℃ during the day and 6-8 ℃ at night. After 7 days, the temperature can be adjusted to 12-16 ° C during the day and 8-10 ° C at night. The relative humidity of the air can be controlled at 50-70% during the day and 80-90% at night. After 8-10 days, the flower buds sprout and become shiny. 12-14 days, you can show buds. Management during this period is essential for the future growth of peony.
2. Medium-term management. After the peony buds, the temperature during the day can be controlled at 16-18 ℃, and at night 10-12 ℃. About 20 days can enter the "young bud period". During this period, flower buds are very sensitive to temperature changes, and abortion often occurs due to poor resistance of young buds, so the temperature should be relatively stable. The relative humidity of the air is maintained at 50-60% during the day and 70-90% at night. Do not expose the leaves and flower buds to prolonged contact with water to avoid infection with bacteria. At this time, the plants can be sprayed with carbendazim, methyltobutin and other drugs, and indoor bacterium Clear aerosol sterilization. It is worth noting that at this time, the young buds are weak and the drug concentration should not be too high.
About 25 days, the plant entered the leaf exhibition stage. The temperature can be controlled at 18-20 ℃ during the day and 12-14 ℃ at night. When the temperature is high at noon, you can ventilate on the top of the greenhouse to exercise the resistance of the plants. The length of the ventilation time should be determined by the indoor temperature. Do not ventilate and cool below the greenhouse, avoid cold air directly attacking the plants, and stop the flower buds from developing, commonly known as "cold cold". If conditions permit, air circulation facilities can be added in the greenhouse to promote indoor air circulation and increase the transpiration effect of the leaves, which is beneficial to peony leaf expansion, leaf release, and disease reduction.
About 35 days, the flower buds entered the "flat bud period". At this time, the flower buds were more resistant to stress and gradually adapted to changes in temperature. As long as the temperature did not change too much, it would not affect the flowering rate. , Reasonably grasp the temperature. The temperature during the day can generally be controlled at 18-20 ℃, and at night 10-16 ℃. In this greenhouse, the temperature is high, the humidity is high, and stem rot often occurs. To prevent this, you can use spray 600-800 times or 10% methyltobutine wettable powder spray 500 times to prevent it.
3. Post-management. About 40 days, the peony enters the heavy pupae stage, and about 45 days enters the bloom stage. At this time, the temperature can be reasonably adjusted according to the flowering time. Even if it is stored in a cold room at 2-4 ° C, it can still bloom normally after 10-20 days. .
Second, artificial supplementary lighting
The peony is a long-day plant. Due to the short sunshine duration and weak light intensity in winter, it often affects the flower formation rate and growth potential. Insufficient light in the early stage can make the pedicel longer, thinner and drooping flowers. Insufficient light in the later stage can affect the coloring and reduce the quality of the flower. Therefore, supplement the light in time to meet the growth and development requirements for light. The specific method is to use a fluorescent lamp. Or incandescent lamp to supplement the light source of peony, fill the light on cloudy days, sunny day in the early morning and dusk, supplement light for 3 hours a day before budding, the average daily light is 4045 lux, 5 hours of daylight during the leaf show period With an average daily light intensity of 5150 lux and a leaf reopening period, 7 hours of light per day and an average daily light intensity of 5330 lux can make the leaves large and fat, the flowers develop well, and the flower color is pure and bright.
Third, the preparation of substrates, fertilizing water
1. Prepare the matrix. Peony likes fertile and loose sandy loamy soil. Pay more attention to its characteristics when selecting pot soil. Generally, one piece is prepared by washing with fine slag and peat soil. This substrate has good air permeability and strong water permeability. Fertility is sufficient, the peony planted has many new roots, does not rot, grow well, and grow vigorously.
2. Make up fertilization water. Initial management: water should be drenched in the early stage, and watered in time according to the wetness of the pot soil, usually once every 7-10 days. Combined with watering, fertilizers can be applied retrospectively, and they are generally diluted with fully decomposed cake fertilizer, oil residue or potassium dihydrogen phosphate. After the leaf-expansion period, the peony roots can be topdressed. Phosphorus, potassium, and micro-fertilizers are still the main fertilizers. Potassium dihydrogen phosphate is generally controlled within 0.3%. Based on the principle of less application and frequent application, spray once every 3-5 days. The back of the leaf and the leaf surface should be sprayed evenly when spraying, and it is advisable not to drip. It should be done in the afternoon. Combine spraying fertilizer and spraying fungicide to prevent disease.
Post-Spring Management
1. Peony with buds to be placed should be placed in a place with sufficient light at 15-20 ° C to promote its blooming.
2. The peony entering the full bloom period should be placed in a place with scattered light at 5-12 ° C and watered about 250 ml every 2-3 days to extend the bloom period. Water can also be sprayed on the leaves of the peony, but it should be noted that only the leaves can be sprayed, not the flowers, to prevent the petals from falling off.
3. After flowering, the residual buds should be removed first, and then transplanted in large pots, or moved outdoors for open field cultivation after the ground defrosts.
4. In the case of ensuring the survival of the old branches, the new shoots can be appropriately removed.
5. To ensure adequate nutrition, fertilizers such as compound fertilizer, fermented bean dregs, and bean cake can be used.

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