After the beginning of autumn, the temperature dropped, the climate became cool, the growth of autumn green onion plants accelerated, and the fast and light green swelled, which was the key period for the formation of yield. During this period, the focus of field management is to cultivate soil as the core. Here are the key points for soil management.
First, grasp the right time
When welsh onion height is about 30 centimeters when soil is cultivated, North China generally conducts the first time of earth training in mid-August. After 15 days, the soil is once cultivated and continues until mid-September. Generally, it takes 3-4 times for the whole growth period.
Second, avoid injury and damage the leaves
When taking the soil, the bread should be kept at a proper distance from the onion root system so as not to damage the root system. Generally, earthing is selected at 4-6 pm in the afternoon. The onion leaves are soft and are not easily damaged by machinery. Every time the earth is to be kept, the stems and leaves of the green onion should be kept upright. Don't let the earth not pass through the heart, or it will easily cause the light blue and the leaves to rot. When soil is cultivated, the soil on both sides of the onion ridge should be photographed to prevent it from falling due to watering or rain.
Three, balanced with top dressing
It is best to combine topdressing with each soil. Welsh onion is a kind of vegetable with higher yield. In addition to applying base fertilizer, the top dressing with reasonable ratio can significantly increase yield and improve quality. The first time the soil can be used for the cultivation of 50 ton of glutinous bean cake and 20 to 20 kg of urea. Early application of nitrogen fertilizer can promote the robust growth of stems and leaves, laying the foundation for high yield; the second time is the rapid development of green onions and white stalks. Followed by the application of decomposed bean cakes and 100 kg of compound fertilizer and 30 kg of compound fertilizer; the third cultivation of topdressing 30 kg of calcium nitrate, can promote light blue growth, thicker plants, but also to prevent the occurrence of soft rot.
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