How to choose walnut seeds? What are the methods of raising seedlings?

Walnut belongs to the fruit tree of the nut category. The fruit of walnut consists of three parts: green pericarp, core shell and edible nucleolus when ripe. Nowadays, people pay more and more attention to health preservation, and the demand for walnuts in the market is increasing. When farmers plant walnuts, many use seeds. So how to choose the seeds of walnut trees? What are the methods of raising seedlings? Next, let's have a look with the editor.

How to select the seeds of walnut trees?

Generally choose the local walnut as the seed, the fruit is required to be full, uniform size, no mildew, broken. The seeds must be fully mature, and walnuts harvested in advance should not be used, otherwise the high germination rate of walnut seedlings can not be ensured.

Second, what are the seedling methods of walnut trees?

1. Seedling land arrangement

Generally speaking, after the wheat harvest, the nursery land should be turned over about 30 centimeters deep. Apply enough base fertilizer, rake the land, spread phoxim fruit granules when sowing to control underground pests, can also spray chlorpyrifos, sowing in spring should also rake the land in autumn.

2. Deal with the seeds

Seed sowing and seedling raising of walnut can be divided into autumn sowing and spring sowing, generally spring sowing can be sown directly, and spring sowing has the advantages of adapting to agricultural season, but it is easily restricted by climatic conditions and soil moisture, so it needs to be sown after budding treatment. The main methods of accelerating germination are digging ditch sand storage, soaking seeds in lime water, soaking seeds in cold water, soaking seeds in warm water, soaking seeds in boiling water and so on. If you choose to soak the seeds in lime water, generally soak the seeds in 5% lime water for a week, then expose them in the hot sun for 2 hours, select the seed of the walnut suture opening, and continue to soak the walnut without opening until the opening can be soaked.

3. Sowing time

Can be divided into autumn, late autumn, spring sowing, autumn sowing can be in walnut natural maturity with green skin sowing, the same year and can sprout to winter defoliation when the seedling height can reach about 20 cm, if the management is in place, the next year can be grafted in the same year, finished seedlings. Leave 1 strong bud to erase the rest after sprouting in spring, but cold prevention measures should be taken in cold areas in winter, such as soil piling or mulching at the roots. You can also choose to sow seeds in late autumn.

Sowing in late autumn is to sow the sun-dried walnut seeds directly without any treatment before the soil is frozen. Spring sowing is from the end of March to early April, and the seeds need to be treated before sowing. Seedlings emerged 20-30 days after sowing. The seeds can be soaked in water for 5 to 7 days, change the water once a day, make it absorb water and expand, and then expose it to the sun. Most walnuts can be sown when they crack.

4. Seedling management

Do not water before sowing and emergence in spring to avoid soil hardening, but when there is too much drought in spring, water according to drought, pay attention to shallow hoe after watering to prevent hardening. Control weeds in time, when the seedling height is about 20 cm. According to rainfall or watering, 20 jin of urea was applied in small ditches between rows. Do not apply urea after August, you can spray 0.3% potassium dihydrogen phosphate plus methyl topiramate. There is usually no pest in the first year when there is no walnut orchard nearby. Flat stubble before germination in the middle of March of the second year, about 5 cm high. Leave one bud after sprouting and wipe off the rest.

The above is the introduction of walnut trees. Walnuts can be sown in trenches with a depth of about 8 cm. The walnut crack is perpendicular to the ground, and the seed tip is sown to one side, so that the seedlings are uniform and the growth is prosperous. Sowing can be deeper in late autumn and shallower in spring.

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