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

Oak is a general term for Fagaceae plants, which is tall and has good ornamental value and ecological value. In addition, oak is also one of the most important broad-leaved trees in China, which is distributed in most provinces and cities in China. With the increasing demand for high-quality seedlings in urban and rural greening construction in China, oak cultivation has a specific and good promotion value. So in the process of cultivation, how to select oak seeds? What are the methods of raising seedlings? Let's get to know it.

How to choose oak seeds?

For planting oak, seed selection is also extremely important, only with high-quality seeds sowing, can have a better sprouting effect. Therefore, in the process of seed selection, we should try to select seeds with full grains and high quality, and do a good job of sprouting treatment. In addition, from cold temperate zone, temperate zone, warm temperate zone to subtropical zone, there are about 140 species in China, such as sesame oak, Mongolian oak, alpine oak, Cyclobalanopsis glauca oak and so on.

What are the methods of raising seedlings?

1. Seed treatment

Before planting, it is best to wash the impurities on the surface in clean water, then treat them with a small amount of gibberellin and air-dry them in a gout environment.

2. Sowing time

Oak seeds are most suitable for sowing in March and April, because the acorn fruit is relatively large, so the soil cover is thick and requires a certain amount of humidity and temperature. It is generally kept in a wet soil layer of one centimeter thick, not in particularly dry weather. You don't need to irrigate every day.

3. Sowing and raising seedlings

Select the nursery with flat terrain, loose soil and good drainage, combined with soil preparation to build beds, apply base fertilizer 3000kg, compound fertilizer 200kg per 666.7m2, and 1-2kg carbofuran to kill underground pests. Using the method of on demand, the seeding ditch was opened according to the row spacing of 20-30cm.

In addition to sowing and raising seedlings, oak seeds can also be treated by container seedlings and grafting seedlings.

4. Seedling stage management

20-40 days after oak sowing, the germ is exposed to the ground, and some tree species emerge late, such as water oak takes 60 days, during this period, we must pay attention to resist early watering and keep the soil loose and moist. If you use plastic film to seal and moisturize, when the temperature exceeds 35-40 ℃ at noon in a sunny day, you should pay attention to opening the film for ventilation.

In order to improve the growth environment of seedlings, weeding in the nursery should be in place, and the soil can be loosened properly in combination with weeding, not less than 5-6 times in the whole year. From June to July, nitrogen fertilizer can be applied properly, the amount of nitrogen fertilizer is 7-8kg/666.7m2, topdressing 2-3 times.

Oak seedlings have straight roots, well-developed main roots, few lateral roots and fibrous roots, which often affect the survival rate of transplanting. Therefore, root cutting is the key to promote the lateral root growth of seedlings and cultivate high quality oak seedlings. The root cutting time is from late June to early July. With a sharp iron shovel, the main root of the seedling is cut off along an angle of 45 degrees at the root neck 8-10cm with a sharp iron shovel. The depth of root cutting is 8-10cm.

The benefits of planting oak are various, which can cultivate the increasingly scarce high-grade wood resources, provide industrial raw materials, and improve the forest ecosystem of our country. Therefore, growers want to improve planting efficiency, in addition to the above seedling work to be skillfully mastered, oak seedlings after the growth of adult tree management also needs to be well implemented.

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