First, grasp the timing of planting
The principle of “cold tail warmer†should be mastered for spring planting of vegetable seedlings in protected areas. After a cold weather, sunny and hot weather lasting for more than four days is appropriate, so that the ground temperature can be continuously and steadily picked up. , resume growth as soon as possible.
Second, scientific formula fertilization
The production of vegetables in protected areas is a relatively closed environment. It is required that the base fertilizer used must be fully cooked and the livestock and poultry excrement must be subjected to high-temperature fermentation. Otherwise, the direct application of pesticides will easily induce the transmission of pests and diseases. The heat generated by fermentation will damage the rooted sprouts and produce ammonia. Other harmful gases cause gas poisoning. The combination of decomposed organic fertilizer and chemical fertilizer has the best effect. According to the type of vegetables to be planted, the proportion of fertilizer should be selected. Leafy vegetables should use high-nitrogen, low-phosphorus, and high-potassium compound fertilizers. Fruit, vegetables, and vegetables should use fertilizers with a balanced ratio of nitrogen, phosphorus, and potassium.
Third, choose age-appropriate seedlings
The quality of vegetable seedlings cultivated by a vegetable farmer using a soil-heating greenhouse or improved impotence is sometimes uneven. Prior to planting, seedlings should be graded, and diseased seedlings, aging seedlings, young seedlings, and old seedlings should be eliminated and eliminated. High quality seedlings. The selection of strong seedlings in production is conducive to rapid seedling growth, and the seedlings have a high degree of uniformity and are conducive to bumper harvests.
Fourth, do a good job of insulation work
Before and after the planting of the seedlings, the greenhouse must be maintained at a higher temperature, the higher temperature is favorable to the seedlings of the vegetable seedlings, the wound healing of the damaged roots is healed, and the roots grow rapidly. Pay attention to watching the weather forecast. Before the cold weather comes, it must be covered with grasshoppers at the night or the insulation temperature is increased. On the eve of the strong winds, do a good job of fixing the film to prevent the wind from damaging the film and freezing seedlings.
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