How to harvest the seeds of Koelreuteria paniculata? What are the methods of raising seedlings?

Koelreuteria paniculata is resistant to cold and drought and is often cultivated as a garden ornamental tree. In addition, wood can be made into furniture and leaves can be used as dyes. It is of high value and has been planted in many areas. So how to harvest the seeds of planting Koelreuteria paniculata? What are the methods of raising seedlings? Let's learn about it.

How to harvest the seeds of Koelreuteria paniculata?

The fruit of Koelreuteria paniculata matures from September to October. Can choose to grow well, straight stem, open crown, full fruit, in the mature age of Koelreuteria paniculata as the mother tree, should be collected in time when the fruit is not cracked, otherwise it will fall off by itself. But it should not be picked too early, otherwise the seed germination rate is low. After the fruit is collected, the peel and pedicel should be removed, and the peel and pedicel should be dried in time or spread out in the shade. After the capsule is cracked, it should be beaten and threshed, and the seed should be cleaned by screening method.

What are the methods of raising seedlings of Koelreuteria paniculata?

1. Sowing seeds

Sow in March in spring, take out the seeds and sow directly. When base fertilizer is applied on the selected land, the sowing method can be sown with wide strips, which has the characteristics of ventilation and light transmission and easy management. After sowing, it is covered with a layer of loose and fine broken soil with a thick layer of 1~2cm to prevent the seeds from drying and losing water or being harmed by birds and animals. Then irrigate once with small water, and then cover with grass, straw and other materials, in order to increase the soil temperature, maintain soil moisture, prevent the growth of weeds and soil hardening, about 20 days later, the seedlings came out and the straw was removed.

2. Seedling management

When the seedlings grow to 5~10cm height, it is necessary to keep about 12 seedlings per square meter. the principle of inter-seedlings is to get rid of inferior seedlings and keep good ones, and it is better to keep them in overcast and rainy days. In addition, combined with inter-seedlings, we should supplement seedlings in order to ensure uniform distribution of seedlings.

3. Daily management

Do a good job in the daily management of loosening soil, weeding, watering, etc., the seedlings can be dug up and graded after growing up, and transplanted in the spring of the next year, the roots will be slightly cut short before transplantation, and the stem of the seedlings will be cut off from the rhizome after the end of transplantation, and then watered thoroughly. Sprouts should be wiped frequently after germination, leaving only the strongest bud to become the trunk. During the growing period, the soil is often loosened, weeded, watered and fertilized, and a straight trunk can be formed in autumn.

4. Fertilization management

Fertilization is an important measure to cultivate strong seedlings. After the seedlings are unearthed and grow roots, it should be combined with watering and fertilization frequently. In the peak period of annual growth, nitrogen-based quick-acting fertilizer should be applied to promote the vegetative growth of the plant. In autumn, it is necessary to stop the application of nitrogen fertilizer and increase the application of phosphorus and potassium fertilizer in order to improve the Lignification degree of plants and the cold resistance of seedlings. In winter, farm organic fertilizer should be used as base fertilizer, which not only provides persistent nutrients for seedling growth, but also plays the role of heat preservation and soil improvement.

5. Shaping and pruning

The crown of Koelreuteria paniculata is nearly spherical, the tree shape is straight, and the natural tree shape is generally adopted. Due to different uses, the plastic requirements are also different. The seedlings of street trees should have a straight trunk, the height of the first branch is 2.5 m to 3.5 m, the crown is complete and plump, and the branches are evenly distributed and developed. Shade trees require large and dense crowns, and the height of the first branch is lower than that of street trees.

6. Disease control

Gummosis was sprayed with stone-sulfur mixture every 10 days before germination in early spring, twice in a row to kill overwintering pathogens. Spray chlorothalonil or carbendazim 800 to 1000 times during the onset period. Aphids can be buried in late April, 15% aldicarb granules are applied in the roots, the tree dry diameter is 1: 2g per centimeter, and the tree is watered after covering the soil, or dimethoate EC is poured about 1.5kg per centimeter in dry diameter. During the occurrence of Japanese tortoise wax, the mixture of 2000 times of benzoin and 1000 times of detergent was sprayed 2 to 3 times with an interval of 7 to 10 days. Irrigating the root twice in May with 25% carbofuran wettable powder 200 to 300 times has a good effect on killing nymphs.

The above is about Koelreuteria seed harvesting and seedling methods are introduced, in order to effectively ensure the growth of Koelreuteria paniculata, we must do a good job in these management points, about Koelreuteria planting you have anything to add? Welcome to leave a message to share!

For the wonderful pictures and articles and popular comments on the seeds of Koelreuteria paniculata, you may be interested in the following recommended contents of Nongxun. Welcome to read.

Agricultural products you may be interested in: national Koelreuteria seed supply

Phellodendron mandshurica (Thunb.)