Common problems and solutions for onion seedlings
Onions, also known as onions and scallions, are annual vegetables that are widely grown in China and are a very common vegetable. Due to the rich nutrition of onions, there are many “vegetable queens†in Europe and the United States. There are many farmers who grow onions. In the process of onion cultivation, the most important thing is onion seedlings. However, farmers always encounter some problems when onion seedlings, so Xiaobian today summed up the common problems and solutions of onion seedlings. Let's take a look. 1, no seedlings after sowing After the onion is planted, due to environmental and management problems, the farmer can open the bed and check it. As long as the peeled seed coat embryo is still white and fresh, it means that the seed has not died yet, and corresponding measures can be taken to produce seedlings later. Solution: If the bed soil is too wet, you can sprinkle the vegetation ash on the nursery bed, which can absorb moisture and warm. 2, the emergence is not neat The uneven emergence of onions is mainly caused by sowing techniques and seedbed management. The temperature, humidity and air conditions of the various parts of the seedbed are inconsistent, making the onion emergence irregular. Uneven soil cover after sowing is also an important reason. The soil covered with thick soil is rich in water, but the soil temperature is low and the gas permeability is poor. The cover soil is too thin, the soil temperature is high, and the bed soil is easy to dry, which is not conducive to emergence. At the same time, the time required for the excavation of thick soil seedlings to pass through the soil layer is also long. The sowing bed is uneven, the soil in the low bed is rich in water, the soil temperature is low, the air is small, the cover soil is thick, and the emergence is slow. 3, root The onion roots are mainly caused by the low temperature of the seedbed, excessive humidity and insufficient light. The seedling bed is low-lying, the bed soil is not well formulated, the clay is too much, the permeability is poor, and the roots are prone to occur. If the bottom water is poured too much and it is exposed to yin and snow, it is easy to cause roots. Solution: After the onion roots occur, all measures should be taken to increase the temperature of the seedbed, such as multi-layer cover, firing furnace, etc., and timely ventilation and dehumidification, or can be applied to the wood ash to absorb moisture. At the same time, the roots are sprayed with rooting agents to promote new root growth. 4, burning roots The root of the onion is yellow, the roots are short and short, and no new roots are produced, but the roots are not rotten. The growth of the shoots is slow, forming small old seedlings. In severe cases, the seedlings die. Rooting is mainly caused by excessive fertilization, especially due to excessive nitrogen fertilizer and bed soil drought. Solution: To find the problem of burning onions, it is necessary to water more and reduce the concentration of fertilizer in the soil. Leaf spray rooting agents can also be used to promote new root growth. 5, Chang Chang Miao The main reason for the onion seedlings is the lack of sunlight, excessive nighttime temperature and excessive nitrogen and water. The seeding density is too large, the seedlings are crowded, and the light between the seedlings is weak. Solution: Strengthen the management of temperature and moisture. The amount of seeding and nitrogen fertilizer application should not be too much, pay attention to the combination of NPK. To keep the film clean, try to extend the lighting time and light intensity. 6, aging seedlings The main cause of onion aging seedlings is malnutrition and prolonged high temperature and drought. During the nursery period, the child is afraid of long, the water is too strict and does not control the temperature, and it is most likely to cause the aging of the seedlings. Solution: When the seedlings are aged, in addition to paying attention to the normal management of temperature and water and fertilizer, they can spray the small leaf enemy, spray Shibao and other plant growth promoting agents. After one week, the seedlings will gradually return to normal. The above are the common problems and solutions for onion seedlings. The above problems occur during the onion seedling process. If not solved in time, it will seriously affect the normal growth and development of onions, which will reduce the onion production and reduce the economic benefits of farmers. Therefore, farmers must Arouse attention. For the wonderful pictures and popular comments on onion seedlings, you may be interested in the following recommended content, welcome to read. Vacuum packed Shelled shrimps,Vacuum packed shrimps,Fast Food Dried Shrimps Zhejiang Ocean Family Co., Ltd., , https://www.ocean-family.com.jpg "Common problems and solutions for onion seedlings")
