How to select the seeds of Elm Leaf Plum? What are the methods of raising seedlings?

The elm leaf plum is named because of its leaves like elm and flowers such as plum. Prunus mandshurica is a rare tree of the genus Peach in Rosaceae with luxuriant branches and leaves and colorful flowers. It is a widely cultivated early spring flowering tree species in northern China. Now it is the time when spring is in full bloom, and it is also the time when the growth of elm leaf plum is the most exuberant. And if flower friends want to plant elm-leaf plum well, they have to learn the skills of selecting seeds and raising seedlings.

How to select the seeds of Elm Leaf Plum?

There are still many varieties of elm leaf plum, such as single elm leaf plum, double elm leaf plum, curved branch elm leaf plum, truncated elm leaf plum and so on. Generally, the seeds of Prunus mandshurica are used to propagate single-petal varieties with small flowers, light color and few flowers, and the varieties with double petals, bright colors, large flowers and many flowers can be developed by grafting.

The shape of elm leaf plum is generally bushy, and it is easy to sprout at the base after grafting, and it is difficult to distinguish rootstock from scion. Through high grafting and replacement, the small tree type can be formed, the ornamental property can be improved, and the sprouting can be removed easily.

What are the methods of raising seedlings?

1. Seed collection

The fine single tree with 15-year-old, strong growth, normal fruit and no diseases and insect pests was selected as the seed collection mother tree. When the pericarp is orange-yellow or red-yellow in mid-late August, it can be harvested.

2. Sowing and raising seedlings

Select sandy loam or loam with flat terrain, convenient irrigation, good drainage, soil depth of more than 1 m, PH value of 7-8, and organic matter content of more than 1%. Soil preparation in autumn, ploughing depth of 30-35cm, combined with deep ploughing and application of rotten organic fertilizer 1000-1500 / mu, sufficient winter water.

The seeds can be germinated 15-20 days before sowing. When the thawing depth of the soil surface reaches 15-20cm, the seeds can be sown. Generally, the method of trench sowing is used, the row spacing is 25-30cm and the ditch depth is 5-7 cm. The seeds are evenly sown in the ditch according to the interval of 3-5 cm and covered with 2-3cm fine sand.

3. Post-broadcast management

Irrigation immediately after sowing, and timely irrigation when the soil water content is less than 60%. Seedling height 10-15cm time seedlings, according to plant distance 6-10cm, retained seedlings 20000-25000 plants / mu, when seedling height reached 25-30cm, topdressing nitrogen fertilizer 5-10kg/ mu, followed by nitrogen fertilizer 10-15kg/ mu at intervals of 30-40 days.

4. Grafting seedling

The rootstock was grafted after sap flow in spring, and the nursery was irrigated 5-7 days before grafting. Skin grafting and split grafting can be used, that is, the scion is directly inserted between the xylem and the cortex, and then the interface is tightly wrapped with plastic film; the split cutting surface is inserted into the split of the rootstock to make the cutting surface of the scion slightly exposed, and the rootstock and ear cambium are closely aligned, and then bound with plastic strips.

Generally speaking, Prunus mandshurica is the main flowering tree species in the arid area of Northwest China, which has the characteristics of cold resistance, drought resistance and barren resistance. in order to standardize the reproduction process and promote the prosperity of Prunus mume blossom, it is the key to master the key seedling breeding techniques.

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