Many people may have encountered this situation: After seedlings of flowers and seedlings are planted, they may have already died half or more of their seedlings. The rate of emergence is too low. What are the reasons? Raising the seedling rate of seedlings of flowers and seedlings is a highly technical work. If we want to increase the seedling emergence rate of flowers and seedlings, we should first understand the reasons that affect the seedling emergence rate in order to properly handle the seedlings. Here we have collected some information on this common phenomenon on the Internet to summarize the reasons for the low seedling emergence rate of flowers and seedlings and the solutions. Problems with Seeds There are many flower seeds on the market at present, and some of them are also very particular about packaging. At the time of purchase, whether it is domestic seeds or imported seeds, please pay attention to the production date and shelf life indicated on the packaging bag. Do not buy seeds that do not have a production date and shelf life. Because most of the expired seeds have lost their vitality, they will not sprout. In addition, when buying seeds, flower growers should have a basic understanding of them, such as whether to grasp whether the seed they buy is a two-year-old flower or a perennial flower, which is spring flowers or autumn flowers. According to common sense, seeds sowed in spring usually bloom in summer and autumn; seeds sown in autumn generally bloom in spring and summer (except for woody flowers). If it is counter-productive, it is difficult to achieve the intended purpose of flowering without the necessary equipment. For the seeds that are purchased, especially for the varieties of flowers that have not been cultivated, they should attract more attention. Seeds are not treated well with seeds of different flowers. Different methods of seed treatment are preferred: Seed soaking can be applied to easily germinated seeds. If a bunch of red seeds are soaked in warm water at 40°C for a day and night, they can be sown after rinsing. Seeds of hard seeds such as asparagus, peony, oliv, red sun, and red scent are best soaked in warm water at 40°C for 48 hours and then sowed in pots. After 20 to 30 days, you can Sprout growth. For seeds with short dormancy and easy to germinate, such as Sorbaria sorbifolia and Cercis chinensis, soaking in warm water at 40°C to 60°C for 24 to 48 hours allows direct sowing. Some flowers, such as cloves, waxy plums, and some autumn-sown herbs and flowers, need to be treated at a low temperature (0°C to 10°C) for a certain period of time to promote postharvest and break the embryo's dormancy and germination. The specific method is to mix seed with sand with a humidity of 60%, and then put it into a plastic bag, tightly affix the mouth of the bag, put it in a flower pot, and then bury the pot in an open field of 40 to 60 cm deep; The seeds are placed in a refrigerator at 3°C ​​to 5°C for 60 to 90 days, and they can be sowed in spring. You can also choose to sow in the autumn to allow the seeds to pass through the natural freeze in the winter and sprout the next spring. Some flowers, such as tassels and peony seeds, have the characteristics of double dormancy of radicles and hypocotyls, that is, their radicles need to pass a high temperature of 25°C to 32°C for 1 to 2 months or longer to break the dormancy. For this type of seed, it must be mixed with wet sand before sowing, after a period of high temperature, and then into a low temperature, after high temperature treatment, the spring sowing can quickly germinate seedlings. Do not pay attention to the temperature of seed germination. In addition to the germination of dry seeds, it must also have a certain temperature. For example, cruciferous incense bulbs must germinate at a suitable temperature of 5°C to 20°C. Gerbera must germinate at a temperature of 20°C to 25°C, and primroses must have a germination temperature of 15°C to 18°C. If the temperature is too high or too low, the emergence rate of flowers will be affected. In particular, the phenomenon of mildew and decay of the seed will occur, and the germination rate and seedling rate of the seed will be greatly reduced. The sowing time is not good enough for all seeds with smaller particles and loose skin, such as chrysanthemums, asparagus, impatiens, tenasian red, gardenia flowers, etc., suitable for late spring sowing; any large particles, solid or oily skin Seeds such as rose, pomegranate, kumquat, broad magnolia and other flower seeds are suitable for sowing in autumn. Seeds with small particles, relatively thin skin, and high temperature should be sowed in time after maturity. Flowers such as cyclamen and cineraria should be sown in early summer. Flowers such as dianthus and pansy should be sown in late autumn. Inadequate sowing of flower seeds The sowing of flowers is divided into open sowing and pot sowing. The sowing methods include sowing, drilling and sowing. No matter which method requires loose soil and ventilation, small particles, health and non-toxic, rich in humus nutrients, moderate pH, which is conducive to seed emergence. Put enough water before sowing, cover the plastic film after sowing or cover the flowerpot with glass to protect the earth, and prevent the soil from drying to affect the seed germination and emergence. The sowing depth should be about 2.5 times the diameter of the flower kernel. Seeds of tiny seeds, such as cockscomb, August chrysanthemum, Begonia sinensis, and cineraria, are sprinkled with fine sand or soil powder and sprinkled on the seeds. After germination, the seeds should be sprayed with moisture, but the water spray should not be excessive to prevent the reduction of soil temperature or erosion of seeds and seedling fibrous roots, which will adversely increase the emergence rate. Neglecting the effects of light After flower seeds are sown, light can increase the temperature of the soil and induce seed germination. This is especially important when seeds are worn through the seed coat to reveal root buds. It not only affects the seedling emergence rate, but also directly relates to the ability to grow good seedlings and strong seedlings. Therefore, from sowing to transplanting stage, it should be a process from darkness to low light to natural light. According to the different stages of sowing, germination and emergence, we should try to meet the needs of flower growth.
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Model specifications: Sterile type. The color is mainly white, supplemented by blue and green. Specifications are divided into 5 * 5-4 / 6/8/12, 7.5 * 7.5-4 / 6/8/12, 10 * 10-4 / 6/8/12, 10 * 20-4 / 6/8/12 , 5 * 70/3 * 100/5 * 100, etc .; with or without light, can be folded according to different requirements.
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