The latest planting methods of sweet-scented osmanthus seeds

How to plant sweet osmanthus seeds? Sweet-scented osmanthus seeds are drupes, long oval, angled, and generally mature from April to May. When mature, the outer bark changes from green to purplish black and falls off from the tree. Seeds can be picked from trees or picked up on the ground, but they must be picked as they fall, otherwise the spring climate is dry and the seeds are easy to lose water and lose their sowing value. let's take a look at the planting methods of sweet-scented osmanthus seeds.

Pre-sowing treatment of sweet-scented osmanthus seeds

1. Seed modulation: after sweet-scented osmanthus seeds are harvested, they should be modulated immediately. The outer seed coat of ripe fruit is soft, which can be washed with water immediately, remove empty seeds and small seeds floating on the water surface, pick out impurities, and then dry them indoors. Be careful not to dry in the sun, because there is no waxy layer on the seed coat of sweet-scented osmanthus, it is easy to lose water and dry up, thus losing physiological activity.

2. Seed storage: sweet-scented osmanthus seeds have the characteristics of physiological post-ripening, which must be accelerated by proper storage in order to sow and raise seedlings. Osmanthus fragrans seeds are generally stored in two ways: sand storage and water storage.

① sand storage is covered with wet sand. The best place to store seeds is in a cool and ventilated place and pile them on the land or sand, not on the cement ground.

② water storage is to put the seeds in a breathable but not easily rotten bag, fasten the mouth of the bag, and put it in cold water, preferably in running water. Check frequently to see if the seeds are dehydrated or moldy. The seed bag stored in water should not be out of the water. In summer, the seed bag should be kept away from the hot water layer of the water surface, so as to prevent the seed from germinating and rotting by heat.

3. Inspection and disinfection of seeds

① test: seed testing should be carried out before sowing, and shell seeds and spoiled seeds should be removed. Then use a knife to randomly cut a number of full seeds to observe whether the kernels are fresh and have the ability to live. Generally speaking, the kernel of a good seed is milky white.

② disinfection: first wash the seeds with clean water, then soak them in 0.5% potassium permanganate or 1% bleach solution for 15 minutes, then filter out the residue of the disinfectant solution, rinse the seeds with clean water, dry and sow the seeds; or soak the seeds in 0.5% formalin solution for 15 minutes, drain the solution, seal the seeds for half an hour, then rinse with water to dry and sow the seeds.

4. Sprouting treatment: in order to make the seeds germinate quickly and neatly, the sterilized seeds can be soaked in warm water of about 50 ℃ for 4 hours, then taken out and put into baskets, covered with wet cloth or straw, and germinated at a temperature of 18 ℃ to 24 ℃. When half of the seeds are cracked or the radicles are slightly exposed, the seeds can be sown. In the process of accelerating germination, the seeds should be turned frequently to keep the temperature and humidity of the upper and lower layers consistent, so that the buds can sprout neatly.

Seed sowing method of sweet-scented osmanthus

From February to early April of the following year, sowing and raising seedlings can only be carried out when the seeds are white. The strip sowing method is generally used, that is, to make horizontal or longitudinal grooves on the seedling bed, with a width of 12 cm and a depth of 3 cm, and sow a germinated seed every 6-8 cm in the ditch. When sowing, the navel of the seed should be placed on the side so as not to bend the radicle and young stem and affect the growth of the seedlings. In Guilin area, it is usually sown with wide strips, with a row spacing of 20 cm, a width of 10 cm and a width of 10 cm. Sowing 20 kg per mu can produce 25000 seedlings.

Cover the fine soil immediately after sowing, and the thickness of the soil should be no more than 2-3 times the transverse diameter of the seed; smooth the border after covering the soil to avoid stagnant water; cover with a thin layer of straw to prevent the cover grass from being blown away by the wind; then spray water fully with a fine-eye spray can until the soil is soaked. Grass mulching and water spraying can keep the soil moist, avoid soil hardening, and promote early germination and emergence of seeds.

Post-sowing management of sweet-scented osmanthus seeds

The management work after seed germination should keep up in time in order to cultivate robust seedlings. For the growth and development of seedlings, the following six points should be done in the specific operation:

1. Uncover the grass and shade: when the seeds are germinated and unearthed, the grass should be properly uncovered on a cloudy day or in the evening. Uncover the grass too early to reach the purpose of covering the grass; too late, it will break the buds or form tall seedlings. Weeding should be carried out in stages, and a part of the covered grass can be left between the seedling rows to keep the seedbed moist, reduce water evaporation and prevent the growth of weeds. After uncovering the grass, entering the summer high temperature season, we should set up a shed to shade the sun in time, keep the transmittance of the shade about 40%, cover it in the morning and uncover it in the evening, cover it in sunny days and uncover it in rainy days, and store the Reed curtains for sunshade in the first and middle of September.

2. Loosening soil and weeding: loosening soil should be carried out in time, with a depth of 2-3 cm, which should be shallow rather than deep, so as to prevent root injury. Weeding can be combined with loosening the soil, and strive to remove early, small, except. In addition, weeds on ditches, trails and ridges should also be removed to clean the nursery and eliminate breeding places for diseases and insect pests.

3. Interseedling and replenishing seedlings: Osmanthus fragrans seedlings are more shade-tolerant and grow slowly. Generally, it is not necessary to transplant seedlings and replenish them properly. Do not damage the root system of the retained seedling when moving the seedling, and irrigation should be carried out after the seedling transfer, so that the seedling root is closely combined with the soil.

4. Irrigation, drainage and fertilization: drought resistance and seedling protection must be paid attention to in the dry season in summer and autumn, and irrigation should be carried out in the morning or evening. To adopt the method of rapid irrigation and drainage, the water should be watered thoroughly and evenly, and the ditch drainage should be strengthened in the rainy season to avoid the harvesting of seedlings. One month after the seedlings were unearthed, the seedlings entered the period of vigorous growth. Should be irrigated once a month mature thin barnyard manure liquid or nitrogen fertilizer. The concentration is 10 kg of barnyard manure liquid or 150 kg of urea or 300 g of thiamine per 100 kg of water. With the growth of seedlings, the concentration of fertilization can be increased appropriately. After entering autumn, stop topdressing to prevent seedlings from overgrowing and freezing injury. When topdressing, do not attach the fertilizer to the seedlings to avoid damaging the seedlings.

5. Pest control: Brown spot and blight are easy to occur in the nursery of continuous cropping of sweet-scented osmanthus, resulting in a large number of withered and yellow leaves, or root neck and root cortex rot, resulting in the death of the whole plant. At the same time, aphids are also easy to occur in the seedling stage. Therefore, the work of pest control can not be ignored.

6. timely transplanting: the annual seedling height of sweet-scented osmanthus is 20cm and 30cm, and it will be transplanted in early spring of the following year. When the height of 2-year-old seedlings is about 60 cm and that of 3-year-old seedlings is about 1 m, retransplantation is required. When it is used as a shade tree or trunk road tree, it is generally required to be cultivated for 8 years, with a height of 2 meters and a diameter of 8 centimeters, which is beneficial to the maintenance and management after planting.