(1) Scientific water use After about 20 days after the onion is planted, it enters the slow seedling stage. Because the temperature is low during the planting, it cannot be watered in a large amount. Too much water will lower the ground temperature and slow the seedlings. At the same time, the new roots of the newly planted seedlings have not yet germinated, and they cannot be dehydrated. Therefore, at this stage, the number of watering the onions should be more, and the amount of watering should be less. The general principle is not to make the seedlings wilting, and not to dry the ground, so as to promote the rapid development of the seedlings. After the autumn onion seedlings survive, they will enter the wintering period. To ensure that the fixed onion seedlings will survive the winter, it is necessary to timely water the winter water. After the winter, it turns green and enters the stem and leaf growth period. At this stage, the water requirement is to water and promote growth, and to control the watering to prevent the growth. The method of controlling watering is called “small seedlingsâ€. The seedlings should be mastered according to weather conditions, soil properties and growth conditions after planting. Under normal conditions, seedlings are about 15 days old. When the outer leaves of the onion seedlings are dark green, the waxiness increases, the leaf flesh thickens, and the heart leaf color becomes darker, the seedlings begin to water. After that, the water is usually poured once every 8 to 9 days to make the soil dry and wet, to promote the growth of the plants and prevent the plants from growing. Stop watering 7 to 8 days before harvesting to facilitate harvesting and avoid high water content of the bulbs. (2) Fertilization Seven days after transplanting, the manure water of the rare animal was applied once, and the high-quality soil fertilizer was applied once every 7 to 8 days to promote the hair roots and enhance the cold resistance. In the cold season, the onion seedlings grow slowly, and the topdressing can be suspended. In the late February of the next year, when the bulb enters the expansion period, it should be reapplied 1 or 2 times of fertilizer, and 10 to 12 kilograms of urea and 5 to 6 kilograms of potassium sulfate. In late March, the bulbs rapidly expanded, and 1250 kg of manure and excrement were applied per mu, and fertilization was stopped 25 days before harvest. (3) cultivating loose soil Loose soil is beneficial to the development of onion roots and the expansion of bulbs. Generally, the seedling stage should be carried out 3 to 4 times, and the stem and leaf growth period should be carried out 2 to 3 times. After the plants are closed, the cultivating should be stopped. The depth of cultivating should be about 3 cm, the planting area should be shallow, and the place away from the plant should be deep. (4) Harvest at the right time Onion harvesting is generally from the end of May to the beginning of June. When the onion leaves gradually turn yellow from bottom to top, the pseudo stems become soft and begin to fall, the bulbs stop expanding, the outer leather is in the dormant stage, indicating that the bulbs are mature, and should be harvested in time. After the onion is harvested, it should be dried in the field for 2 to 3 days. Directly marketed, the roots can be removed and cut off at the upper stem of the bulb, which can be sold in baskets. If you need to store the onions, do not go to the stems and leaves. When the leaves are dried to 70% dry, the stems and leaves can be braided and hung in a ventilated, cool, dry place called hanging onions. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone Sports Towel,High Quality Towel Robe,Quick Dry Sport Towel Robe,Sport Towel Supplier Suzhou Golden Gamrnet MFG Co.,Ltd , https://www.svchangerobe.com