After the beginning of spring, the green onions began to turn green. It is not appropriate to pay attention to onion watering. Because the temperature is low this spring and the ground temperature is low due to lack of light, avoid low temperature affecting the early-onset seedlings. Therefore, the management of water and fertilizer should be strengthened. Specifically, there are two points: First, Reasonable use of water and fertilizer, the principle is a small water and big fertilizer, which means that the amount of watering should be small, the amount of fertilizer should be large, the selection of fertilizer must not only use ammonium bicarbonate and other nitrogen fertilizer, to use nitrogen and potassium fertilizer, it is best to use onion and garlic Fertilizer, the amount of 20-30 kg per mu, once every 2-3 times. The second is to strengthen the rational use of foliar fertilizer, high nitrogen high potassium foliar fertilizer and seaweed fine foliar fertilizer should be used, with 3-4 times in one season.
Management should pay attention to:
1. When the onion flower buds are not open, they are removed to promote the development and growth of the child buds.
2, according to the climate to do about the end of March poured back to Qingshui, must be thoroughly drenched.
3. In mid-April, the height of seedlings is 15 cm. After transplanting, new high-fat membranes are sprayed in time to prevent the infection of pathogens to increase the survival rate. If light green or yellow tips appear, Mu chase 20-30 kg of urea or compound fertilizer 2 to 3 times.
4, digging medium-sized ditch transplanting green onions, must be soiled 1-2 times, so that can grow about 10 cm light blue.
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