?? The use of fixed greenhouses in the winter season to plant a scallion, you can improve the utilization of greenhouses and economic benefits, but also rotation down, not only to create a good sip gargle, but does not affect the early spring fruit and vegetable planting. Planting methods: When the late autumn vegetable production in the greenhouse has been completed, combined with meticulous land preparation, sufficient high-quality organic fertilizer 3000-4000 kg per acre, and then ditch planting onions. Line spacing 25-30 cm, spacing no more than 1 cm, planting depth of 3 cm or so. The planted onion can be selected from the autumn green onions to smaller plants. Post-planting management: After the planting, the water is irrigated once in a timely manner, and once the soil is frozen, it is irrigated once again. When the soil is frozen, be sure to remove the dried onion leaves from the ground. After the snow, the snow on the shed film should be promptly removed to increase the light and increase the temperature of the shed. From late February to early March, when the green onions begin to return to green, it is necessary to fill the water once in a timely manner. It is advisable for qualified farmers to use 10-15 kg of ammonium sulfate with water. Afterwards, the groundwater should be filled with small water, and water should be irrigated 1-2 days before harvest. In this way, it is not only convenient to start the onion but also to keep the green onion tender. After the harvest, the field must be fielded in time to prepare for planting seedlings in early spring.
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