The first is to apply full maturity farmyard fertilizer. It is easy to spread diseases and insect pests after applying the farmer's fertilizer without vegetables to the vegetables. In addition, if the farmhouse fertilizer is put into a greenhouse and then decomposed, ammonia burning burn vegetable seedlings will be produced.
Second, the fertilization method should be scientific and reasonable. Basal fertilizer is best applied one week before the colonization of vegetables, and it should be mixed well with the soil. Fertilizer can be planted 7 to 10 cm away from the plant ditch or hole chase, top dressing immediately after top dressing, watering, do not sprinkle fertilizer directly on the ground or plants. So as not to volatilize or burn vegetable seedlings. Fertilizers outside the root should be in the peak season of vegetables and fertilizers, and it is best to choose the time of cloudy or late evening. Spray the fertilizer solution to the back of new leaves and leaves as much as possible to facilitate the absorption of vegetables.
Third, the amount of chemical fertilizer should be appropriate. As the fertilizer in the greenhouse is not easy to lose, therefore, fertilization before fertilization, formula fertilization must not be blindly applied.
The fourth is to apply trace element fertilizers. At present, the fertilizers commonly used in greenhouse vegetable production include boron, molybdenum, zinc, and iron fertilizers. Micronutrients are used as basal fertilizers and can also be used for seed dressing, soaking or top dressing. But the amount must be accurate to avoid causing damage.
The fifth is to use plant growth regulators properly. Each conditioner has certain conditions and applications in application, and it is necessary to grasp the time and concentration according to the instructions for use. Otherwise, the effect of increasing the yield of vegetables cannot be achieved.
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