How to plant the latest rose seeds?

Generally speaking, rose is propagated by cuttings, and there are very few seeds planted. On the one hand, it is because the seed germination rate is low, second, because seed reproduction will degenerate, and third, seeds are not easy to get, but no matter how difficult they are, it doesn't mean they can't. Rose seeds are suitable for cultivating new rose varieties. Let's take a look at how rose seeds are planted.

What are the characteristics of rose seeds?

Rose seeds have the characteristic of dormancy. There are three reasons for dormancy of rose seeds in general.

The main results are as follows: 1. The seed coat is hard, which can imprison water absorption and respiratory metabolism.

2. The development of seed embryo is not perfect and can only germinate through post-ripening.

3. Due to the existence of some inhibitors, seed germination was inhibited.

The dormancy of rose seeds is caused by ABA (abscisic acid) in pericarp and seed coat. The results were determined by high performance liquid chromatography (HPLC). ABA is found in the pericarp, seed coat and embryo of rose seeds. By means of tissue culture, it was confirmed that there was a high level of ABA in pericarp and seed coat, which was the main cause of seed dormancy. However, the amount of ABA in the embryo is too small to cause seed dormancy.

Pre-sowing treatment of rose seeds

Because of the above-mentioned characteristics of rose seeds, the newly collected seeds can not germinate, and the "sand layer" treatment must be carried out before sowing before germination and emergence. Mix the seeds with wet sand, put them in a container, cover them with 3-5 cm thick wet sand, place them at 0-2 ℃, refrigerate for 60-90 days, and then sow.

Sowing methods of rose seeds

Sowing should be carried out under the condition of 5-10 ℃. It is feasible to sow on demand, sow, strip sow or pot sow, 3 cm apart, and cover with a layer of vermiculite or plain sand 1 cm thick after sowing. In general, seedlings can emerge about 40 days after sowing.

Matters needing attention in seed propagation of Chinese rose

The main results are as follows: 1. Usually around November, the ripe fruit whose skin turns yellow and red is cut and stored in 0-6 degrees wet sand. In January or February of the following year, the seed selection is prepared for sprouting, and the pre-selected full seeds are put into a plastic bag containing moist sand, fine sawdust or vermiculite, and the mouth of the bag is fastened to avoid light in the environment of freezing and thawing at night and drastic changes in temperature. With the increase of temperature, check once a week. Carefully pick out the seeds that have been cracked and exposed.

2. The germinated seeds are carefully planted in the seedling bed according to the row spacing of 3 cm × 5 cm. The lower part of the seedling bed can be covered with a thin layer of vermiculite (or fine sawdust) with a thin layer of vermiculite (or fine sawdust). Carefully cover a layer of sand about 1 cm thick, and finally spray water with a kettle.

3. Note that the sowing soil should be disinfected and insecticidal, the seedling bed should be arranged in the greenhouse, and the plastic film should be covered on the arch shed at the same time, keep the seedling bed moist and maintain the proper temperature of germinating seedlings at about 20 degrees Celsius. When the seeds emerge and grow 3 to 5 leaves, they should be moved to small flowerpots in time to promote the growth of seedlings. In order to promote the rapid growth of seedlings, the pot soil should keep the vegetables loose, thin fertilizer should be applied frequently, and sunshine should be seen more often. But should not be too much watering, so as not to cause disease.