What are the breeding methods of peony? Key points of propagation and grafting of tree peony

Peony is a plant of Paeoniaceae, which has always been known as the king of flowers. it is widely cultivated in our country, and it can be divided into hundreds of varieties according to the color of flowers. Next, I will take you to learn the breeding techniques of peony.

(1) methods and materials of reproduction

The reproduction of peony is divided into sexual reproduction and asexual reproduction. The breeding methods are different and the germplasm materials are different.

(1) Seeds are used as germplasm materials for sexual reproduction.

(2) asexual reproduction includes ramet, grafting, cuttage, striping and tissue culture.

The ① ramet uses several small peonies separated from tree peony as germplasm materials.

② grafting uses 6-10 cm annual strong branches, scions with strong terminal buds and 2-3 lateral buds growing in the lower part of peony as germplasm materials.

③ cuttings use native shoots or stems from peony roots to make ears on strong, full terminal buds and disease-free branches.

④ striping uses tree peony branches as germplasm material.

The embryos, flower buds, stem tips and tender leaves of tree peony were used as materials in ⑤ tissue culture.

(2) Propagation techniques

The sexual reproduction of tree peony, also known as seed reproduction, is a way of reproduction by using the seeds formed by ovule fertilization in the stage of sexual development. Asexual reproduction includes cutting, ramet, grafting, striping, tissue culture and other ways, the specific methods of propagation are listed as follows.

(2) grafting peony should be selected after early autumn before Chongyang, and the most suitable time is about White Dew, when the survival rate of grafting is as high as 80% ~ 90%. The root of Paeonia lactiflora and peony seedlings can be selected as rootstocks during grafting, and the scions with strong terminal buds and 2-3 lateral buds growing in the lower part of peony can be selected. Peony grafting is usually in the form of branch grafting and bud grafting. The grafting method can be divided into excavation method and resident method.

① grafting method

Dig and join method: Paeonia lactiflora root or peony root can be selected as rootstock. First, the two sides of the scion were symmetrically cut into a wedge with a knife at the lower end of the scion, and at the same time, the top of the rootstock was flattened, and then a crack with a depth of 2 3cm and a length of 3-4cm was cut from one side from top to bottom. Then the scion is inserted into the crack to make the two layers close together; fasten it with hemp rope or plastic film strip, smear the interface with clay slurry, and then plant it.

Residential grafting method: in order to cut off all the branches above 5-6cm of the aboveground part of the original tree peony, the rest method is the same as digging grafting method.

② bud grafting method: generally choose between June and July, when the survival rate is higher. The seedlings of tree peony were selected as rootstocks, and the full buds on the branches of the same year were used as scions. Cut one knife each at about 2cm below the axillary bud of the plant, peel around or cut the square bud as the grafting bud; then cut the same size section on the same thickness of the rootstock branch, then stick the grafting bud on the section and tie it with hemp rope or plastic film strip.

The suitable time for ③ grafting of peony: the grafting of peony depends on specific temperature and humidity, and the grafting is after the beginning of autumn and before Chongyang, especially before and after White Dew.

(3) after cutting propagation before and after the Autumn Equinox, the two-year-old stout and full branches were cut into cuttings with 10~15cm length, and then the gibberellin (GA3) strips of 500-1000mg/L were inserted into sandy loam with appropriate humidity. If the strong and sprouting branches of the same year are selected, they will be cut or treated with .500 mg/L of indoleacetic acid (IAA) around September, and the branches of 2 + 3 will be inserted into the sandy loam with appropriate humidity. If the robust sprouting branches of the same year were selected, they would be cut into cuttings with 2-3 buds around September, and then cut in the mixed medium with 500mg/L 's naphthalene acetic acid (NAA) or 300mg/L 's potassium indolebutyrate (IBA). Adventitious roots could be produced when cultured at 18-25 ℃ for 20-30 days.

These are all the contents of peony breeding technology today. Flower farmers who are interested in peony planting are welcome to come to Huinong Network for reference!

Key points of grafting Propagation of Paeonia suffruticosa

The peony plant is petite and colorful, and the peony after flowering is very delicate and gorgeous, so it is a very excellent indoor potted variety. The peony bears a bright red cactus with a good omen of "good luck", which is very suitable for giving to relatives and friends. So what problems should be paid attention to in the reproduction of such a popular tree peony?

Moutan peony

Peony is mainly propagated by grafting. Greenhouse cultivation can be carried out all year round, and spring or early summer is the best, with quick healing and high survival rate. Select a sturdy and tender rootstock (commonly used day ruler (details), cactus, cactus column, tiger thorn, etc.), flatten the top and set aside; select a strong seed ball about 1 inch in diameter from the mother plant as a scion, peel it off and flatten it with a sterilized sharp blade, press the ball close to the cut of the rootstock, align the center of the ball with the center post of the rootstock, and fasten it with thin thread or thin rubber band. It was cured at room temperature 25 ℃ and 30 min, then untied for 10 days and then cured for 2 weeks. If the interface is intact, it means that it has survived. Generally, you can watch it in the next two months.

The Propagation method of Peony Cactus (grafting) how does Peony survive the Winter

Peony is a kind of plant that blossoms easily and is deeply loved by flower friends. As a plant of cactus family, peony has more tenacious vitality than other varieties, so it is not difficult to feed it. Most of the propagation methods of general plants are grafting. Is it the same with peonies? Let's take a look at how the peony is propagated.

The Propagation method of Peony Cactus (grafting)

1. Preparation for grafting

Choose the rootstock to be grafted with peony. The sphere of tree peony lacks chlorophyll and can not carry out photosynthesis and produce nutrients, so we can choose the method of grafting and rely on rootstocks to provide nutrition.

It is generally necessary to choose rootstocks for more than one year when grafting tree peonies with well-developed and sturdy roots. The commonly used rootstocks are Tianyi, three-angled arrows, keels and other plants. The tools to be used in grafting. Mainly knives and fixtures. For fixed peonies, you can choose small strings or rubber bands.

2. Grafting process of Paeonia suffruticosa

Select suitable and rootstocks and deal with them. Choose the right place in the rootstock, flatten it with a knife, expose the rootstock and deal with the area around the rootstock. The wound should be cleaned up, otherwise it is not easy to survive. Deal with the peony to be grafted.

When dealing with the peony, it should be noted that it is necessary to decide how much to cut according to the size of the peony, generally no more than 1/2 of the sphere.

3. Grafted and fixed peony

Aim the center of the cut on the peony at the center of the rootstock and press it with your fingers for about a minute to make the rootstock fit. Then fix it with thin thread or rubber band, and pay attention to the degree of tightness when fixing, so as to avoid the gap between the scion and the rootstock. Too loose or too tight will affect its survival.

4. Waiting to survive

About 15 days after grafting, the grafted sphere was still fresh, indicating that the grafted peony had been grafted. If the interface is cracked or blackened, it means that the grafting has failed and can be regrafted at this time.

Matters needing attention in the grafting of tree peony

1. The grafting of peony can be carried out in the greenhouse all the year round, but the success rate is the highest at the end of spring and the beginning of summer.

2. After grafting, put the peony in the semi-shaded place, suspend watering, let alone spray water on the sphere.

3. When grafting, we should pay attention to fixing the grafted peony, so as not to affect its survival.

How does the peony survive the winter?

1. Temperature conditions

The tree peony is suitable for growing in a warmer environment and has poor cold resistance. Therefore, it is necessary to move it into a warm and comfortable room before cooling down during the winter, so as to avoid frostbite caused by too low temperature, or even threaten its survival. In addition, the temperature had better be kept above 8 degrees Celsius, with 10 degrees Celsius as the best curing temperature.

2. Lighting conditions

Peony needs enough light in winter to ensure its growth, so it should be placed on the windowsill or balcony where the sun can shine, so that it can receive enough light to avoid poor growth due to lack of light.

3. Water and fertilizer conditions

The tree peony has strong drought tolerance and is suitable to grow in a relatively dry environment, so it is more necessary to strictly control the water during the winter, watering less or not watering as much as possible, in order to keep the basin soil dry, avoid damage to its roots, and it is difficult to pass the winter smoothly. Moreover, the lower the temperature is, the drier the basin soil is. At the same time, it should be noted that the peony does not need to be fertilized during the winter.

Water Management of Paeonia suffruticosa

1. Spring: the exuberant growth period of peony, during which the soil should be kept moist and generally watered every 2-3 days.

2, summer: when the temperature is not high, the peony will not dormancy, at this time there is no need to stop water, normal watering can be done. If the temperature is too high and the sun is strong, the peony will go dormant, so watering should be controlled at this time, but it can be sprayed properly.

3. Autumn: it is also the growing period of peony, watering in autumn should be combined with fertilization, and the soil should be kept moist.

4, winter: to control moisture, basin soil to dry, generally within a month can be watered once, the water temperature can not be too low, watering the soil can be soaked.

Fertilization Management of Mudan Tree Peony

1. The peony likes to be fat and does not choose it. Fertilizing during the growing period can be applied with compound fertilizer, pay attention to thin application of fertilizer, once a month, it is best to apply solid fertilizer during cultivation.

2. The peony should stop fertilizing in the middle of summer and severe winter, otherwise it may damage the root system and cause the peony to rot, making it impossible to pass the winter and summer safely.

These are the breeding methods and some key points of maintenance brought by the editor today. have you learned it? Can't wait to try your own breeding skills? Come and have a try, let your peony also grow bright flowers!