Seedling Propagation techniques of Walnut seedlings by Direct sowing

Seedling propagation of walnut

Seed propagation refers to the method of directly sowing and raising seedlings with walnut seeds, but its offspring become less superior and worse, and the fruit is slow, so it is only used to cultivate rootstocks for grafting. The routine is carried out according to six steps: seed selection, seed treatment, nursery preparation, sowing, nursery management and nursery emergence.

1. Seed selection

Choose full, large, fully ripe, disease-free nuts as seeds.

2. Seed treatment

Sowing in autumn can be sown with picking, that is, sowing with green bark. Spring sowing requires sprouting treatment. Soak the seeds in cold water for 5-7 days, then expose them to the sun for 2 days. Most of the seeds can be sown when there are cracks.

3. Preparation of nursery site

Generally choose the slope land with thick soil layer, sufficient soil water and nutrients and suitable temperature conditions as nursery land, and rational layout, intensive cultivation. The nursery land was sterilized and insecticidal. Fungicides can be used with formalin, insecticides can be used with seismodane or trichlorfon crystals.

4. Sowing seeds

Sowing can be divided into autumn sowing and spring sowing. ① autumn sowing after seed maturity along with picking sowing, seedling emergence early and neatly. ② spring sowing takes place from January to March. ③ sowing method and density, first apply 100kg / mu compound fertilizer, then sow on demand, plant spacing 10cm 15cm, row spacing 25cm 35cm. When sowing, make the seed suture line perpendicular to the ground, lay flat at the bottom of the ditch, cover the soil about 6cm, and then irrigate again.

5. Nursery management

① does a good job of rodent prevention. When ② warms up in spring, it is irrigated in time, and the soil moisture is kept at about 70%. ③ ploughing weeds, topdressing chemical fertilizer, improving growth conditions. ④ strengthens the control of diseases and insect pests. ⑤ cut off the main root and promoted the growth of lateral root by cutting root shovel at the base of 15-20 cm distance between seedlings and oblique insertion at an angle of 45 °to the ground.