How to select the seeds of Rosa davidii? What are the methods of reproduction?

Yellow thorn rose, also known as thorn rose, is the most common rose in the rose family, belonging to deciduous shrubs, the color of the flowers is yellow, and like roses, there are thorns on the branches, so it is called yellow thorns. Huang Ci Mei likes the warm environment and is golden when the flowers bloom. it is an important ornamental flower in late spring and early summer in the north. So how to choose the seeds of Rosa davidii? What are the methods of reproduction? Next, let's have a look with the editor.

First, how to select the seeds of Rosa davidii?

Not all seeds can germinate, only single petal can achieve seed sowing. Because the seed coat of yellow thorn rose is very thick, it is not easy to germinate, and the thick seed coat blocks the entry of water, so the seeds should be treated before planting.

The time to deal with the seeds is about May and June, so that they will be planted in the coming year. Prepare a basin of warm water with a temperature of about 65 degrees, soak the seeds for an hour, remove them and sterilize them with potassium permanganate for two hours. Rinse with clean water after being fished out.

2. What are the breeding methods of Rosa davidiana?

1. Sowing and reproduction

Breeding time: the following spring

Breeding method: after collecting seeds, pile them up, let them mature, soften or mash, wash and dry, or mix with wet sand to sow seeds in the following spring. The seeds were soaked in water for two days before sowing, mixed sand accumulated to promote germination, and about 1/3 of the seeds began to sow when they were exposed. Strip sowing, every 667m square meter sowing rate of 2-3kg, sowing depth about 1cm, and then covered with soil, moisturizing, about 20 days, seedlings can be unearthed.

2. Cuttage propagation

Breeding time: rainy season

Propagation method: cut the semi-lignified branches of the current year, keep 2-3 leaves at the top of the cuttings, the length is about 10-15cm, insert into the sandy soil, the plant row distance is 5cm x 5cm, the depth is about 1-2cm, pour through the water for the first time, cover with plastic film, keep the temperature 20-30 ℃, relative humidity 80% ROK 90%, carry on the foliar spray operation every day, control the humidity of the bed substrate, and the survival rate is above 80%. During this period, we should pay attention to the amount of water to avoid causing trees to be drowned.

3. Striping propagation

Breeding time: in July

Propagation method: just press the tender shoots into the soil, wait until the next year to take root, in the autumn, cut off the mother plant, the pseudo-planting will rise, and then wait until the next spring to transplant to the soil, and then a little management, can be successfully planted.

4. Ramet propagation

Propagation time: generally carried out in late March, that is, after defoliation, before bud sprouting in spring.

Propagation method: digging up the sprouting seedlings around the mother plant, planting in the hole with soil with roots, pressing the soil, watering or digging out the whole plant clump with soil, chopping into several parts, retaining 2-3 branches with some roots in each part, and planting separately. The plant spacing is 30-40 cm and the row spacing is 50-60 cm. In order to improve the survival rate, part of the branches can be removed and water transpiration can be reduced. And there are few diseases and insect pests during this period, as long as a little management, it can be successfully propagated.

The above is the introduction of yellow thorn rose, yellow thorn rose after blooming bright, and the flowering period is longer, very suitable for garden viewing, cluster planting, flower hedge. Now it is mainly born in sunny slopes or bushes, and has been widely cultivated everywhere.

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