Pollution-free Planting Techniques of Leek in Greenhouse
1. Site selection and greenhouse construction
Three aspects should be considered in the selection of planting land: one is to choose pollution-free planting land; the other is a planting environment with good drainage performance and fresh ambient air quality; and the third is a high-quality land with fertile soil and dry and flooded land. When planting leeks, choose loams with convenient transportation, good drainage and watering performance, and soil with a lot of organic matter. The convenient transportation is conducive to reducing the transportation time when the leeks are mature and selling to the market, and it is also convenient for planters to take care of them. For the construction of a greenhouse, you can choose a size of 4 meters in width, 40 meters in height, and 40 meters in length.
2. Variety selection
To choose those disease-free seeds, this is a very important step to grow green and pollution-free leeks. Therefore, when choosing varieties, choose leeks with strong disease resistance, strong growth potential, early germination, and good quality. .
3. Cultivation of leek root
At the end of April, the leeks should be harvested once. After that, the leeks should be cultivated, plowed, fertilized and topdressed. When the leeks are budding, the stalks should be picked to accumulate nutrients. In August, apply fertilizer twice to raise the roots of leeks. The first time is in mid-August and the second time is in late September. Fertilizer can choose human and animal manure, calcium phosphate, mainly human and animal manure 15t /hm2 and superphosphate 750kg/hm2, mixed and stirred for fertilization.
4. Fertilizer and water management
When fertilizing, use organic fertilizer as the main fertilizer, followed by chemical fertilizers and micro-fertilizers, and fertilize in combination. Organic fertilizers and NPK compound fertilizers can be applied as a base fertilizer at one time, and then once every four or five days after harvesting. Fertilization and watering, fertilization can also be watered with urine. The editor here reminds me that when fertilizing, do not use pollution-containing domestic garbage and fertilizers containing nitrate nitrogen fertilizer for fertilization.
5. Temperature management
Leek can survive in winter, so it is a relatively freeze-tolerant vegetable. The general survival temperature is 14-20 degrees. If the temperature is below 10 degrees, slow growth will occur, and when the temperature is higher than 25 degrees, it will be affected by leeks. Cause damage, so when planting leeks, pay attention to avoid the wind vents and keep the shed in a state of ventilation and cooling.
6. Pest control
In the process of planting leeks, gray mold may appear. When gray mold occurs, you can choose 5% puhydantoin wettable powder 800 to 1000 times liquid, you can choose 50% Sukeling wettable powder one Apply a solution of 1000 to 1500 times every 7-10 times. Therefore, when planting, choose dry, well-drained land, and pay attention to the temperature during the growing period of leeks.
7. Harvest in time
Leeks can be harvested two or three times in the first year of planting, and three or four times when they have been grown for two years. When harvesting leeks, the most important thing is in the morning on a sunny day, and the temperature in the morning will be relatively compared. Low, and the leeks are placed in bundles after harvest, which can prevent the appearance of rot.
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