After the horticulture experts, especially the experts of the developed countries, the constant efforts. There has been a complete set of technology for the production of seedlings for the four seasons Begonia, but in practice, it is often difficult to truly grasp the production techniques of Begonia seedlings because of insufficient technical mastery, limited Equipment conditions, and lack of experience. Based on the technology and experience we have acquired, we will briefly outline the relevant points and precautions. First, the use of coated seeds early, the quality of the seed is very general, seedling nursery is also very extensive, but also pay no attention to the cost and benefits of cultivation. Modern horticulture pursues large-scale commercial production, such as seeders and containers with plug trays, and seeds are often treated with seeds adapted to modern horticultural production. Although seed coating may have some adverse effects on the germination of seeds, coated seeds have now been widely used because the coated seeds are very easy to handle, suitable for mechanical sowing and growth in plug trays. There are two kinds of coating, one is that after absorbing water, there will be a crack in the middle, roots and buds will grow out of the cracks, the roots will go down, and after the water is poured, it will slowly decompose. Another type of coating does not crack when absorbing moisture, the seeds still germinate in the coating, and the roots slowly grow after germination. The coating seeds of some well-known seed companies, in spite of different technologies and materials, have their own advantages and disadvantages. However, as long as the application technology is truly mastered, there is no need to worry too much about the quality of the seed itself, as long as it is used with confidence. Second, to maintain the density of media and air Wet seeds germinate, the media temperature should be maintained at about 25 °C, and the air humidity should be close to 100%. As Jellyfish seeds are particularly fine and germinating requires high humidity, it should ensure that the medium is fine and uniform and has good heat preservation capacity. The purpose of keeping the humidity is to keep the coating and the seeds in a moist state and have enough moisture because the begonia seed itself has a humidity requirement. Only when the coating and the seeds are in a sufficiently moist and continuously maintained state, can the seeds germinate well. It takes about 20-25 days for the four-season begonia seeds to grow from seeding to germination. For this reason, we recommend that when selecting the medium, full consideration should be given to the medium that holds good water. It is best to use 75% peat special 25% vermiculite or peat and half of frog stone medium for imported seedlings. If conditions permit, it is advisable to have a dedicated germination room. The seeds should be grown in the germination room 7–14 days before germination. Because in the germination room temperature control can be carried out, and to ensure that the seed can meet the humidity requirements. The first method for ensuring the humidity is high-pressure spray, the second is using a humidifier, and the third is using water and air to fully mix and use air pressure to bring out a very fine mist. The third is the most ideal and reliable, but it is generally only used in the germination room. Third, to strengthen the growth and care Fourth, the difficulty of nursery is not just here. In the high-temperature and high-humidity state, from the time when the cotyledon grows (especially after it is taken out of the germination room to the normal condition of the greenhouse) to the time it takes for the two true leaves to grow, it is from the high-humidity state to the low-humidity state. , so it is very easy to cause dehydration and death of plants, so try to gradually reduce the humidity. This is also a difficulty in using germination room nursery. The main measures that should be taken are: l. Light reduction and reduction of leaf transpiration. Because the roots of Begonia plants are already underdeveloped, and their root system is smaller at this stage, generally longer than the shallow surface of the medium. If the light is too strong, the newly emerged cotyledons and seedlings will be burned, and excessive transpiration will lead to dehydration and death of the plants. In the early stage, the darkness in the germination room has no adverse effect on the plant, but after the true leaf grows, it needs a certain amount of light. Therefore, artificial shading is required to reduce light, but it cannot be too dark. 2, spray, waterproof drops, and anti-moss. Because the seedlings of Begonia grow very long and the seedlings grow long, almost all of the plugs or media surfaces are prone to grow moss. The harm of moss is due to the isolation of the air in the medium, resulting in reduced permeability of the medium and consumption of nutrients resulting in poor plant growth and even death. A feasible method is to cover the top of the seedling dish with a layer of plastic mesh (translucent, water permeable, breathable material) that is similar to the thinnest non-woven fabric, covering both light and transpiration, as well as water droplets. And to a certain extent against moss. 3, watering. Not too much, not too little, to control by experience. 4, need a small amount of fertilization. Can be applied 20-l0-20 or 14-O-14 special fertilizer, the concentration is generally not more than 50ppm. During this period, whether or not the operation is appropriate is the key to the success of the seedling cultivation. It is relatively easy to move seedlings from two true leaves to 6 true leaves, and the time is also relatively short. Generally only 10-12 weeks (288 holes) or 12-14 weeks (128 holes) are required from sowing to transplanting. Plug tray). The entire operation process of uncoated seeds is also the same and can be performed with reference to this.
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