Greenhouse Vegetable Scientific Fertilization Technology
If greenhouse vegetable is used improperly, it will not only lead to soil compaction and cause vegetable fertilizer damage, but also cause the content of vegetables nitrate and nitrite to exceed the standard and endanger human health. Therefore, in the greenhouse vegetable production, we must be careful to apply chemical fertilizers, scientific fertilization. Greenhouse vegetables scientific fertilization should pay attention to the following seven aspects: First, the farmyard fertilizer should be cooked: greenhouse vegetables to fully cooked when applying farmyard fertilizer. Because there is no decomposed farmhouse fat and bacteria and eggs, it is easy to spread the disease after it is applied to vegetables. In addition, if the farmhouse fertilizer is put into a greenhouse and then decomposed, ammonia burning burn vegetable seedlings will be produced. Therefore, the farmyard fertilizer should be fully cooked before use. Farmers have complete nutrient content and long-lasting fertilizer effects. After application, they can not only improve the vegetable soil, but also provide a variety of nutrients for vegetables. At least three or more square meters of fertilizer should be applied to each farmhouse. Second, the fertilization method should be scientific and reasonable: the best base fertilizer is best applied a week before the colonization of vegetables, and mix well with the soil. Fertilizer can be planted 7-10 cm away from the plant ditch or hole chase, top dressing immediately after dressing, watering, do not sprinkle fertilizer directly on the ground or plants, so as not to volatilize fertilizer 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 fertilizer should be applied: fertilizer in greenhouses is not easy to lose, excessive application of chemical fertilizers, can cause increased concentrations of salt in the soil, leading to soil salinization. To control nitrogen fertilizers and increase phosphorus and potassium fertilizers, the nitrogen fertilizers that are to be banned or limitedly applied are nitrate nitrogens, such as ammonium nitrate, potassium nitrate and compound fertilizers containing nitrate nitrogen. In greenhouse vegetable management, increase ventilation time and enhance light intensity, can reduce the nitrate content of vegetables. It is not suitable to apply chlorinated fertilizer because the chloride ion can reduce the starch content in the vegetables and deteriorate the quality, and the residue in the soil may cause soil compaction. Limited use of magnesium sulfate, ammonium sulfate fertilizers, because sulfate ions, not easily absorbed by vegetables will remain in the soil after long-term application, and endanger the growth of vegetables. Fourth, the amount of micro-fertilizer to be applied: trace element fertilizer on the vegetables, although the demand is small, but its role in the metabolism of vegetables is great, can greatly improve the quality of vegetables. The commonly used micronutrients include boron, molybdenum, zinc, and iron fertilizers. Micro-fertilizer is used as base fertilizer and can also be used for seed dressing, soaking or top dressing. The range between the appropriate amount of fertilizer and excess fertilizer is relatively narrow, so the amount must be accurate to avoid causing fertilizer damage. Fifth, the use of plant growth regulators should be appropriate: plant growth regulators (such as gibberellin, ethephon, paclobutrazol, etc.) if used properly will promote the growth of vegetables, but each regulator has a certain degree of application The conditions and scope, especially the time and concentration of use, must not be careless, otherwise the effect of increasing the yield of vegetables cannot be achieved, and people's long-term consumption will also be detrimental to their health. VI. Vigorously promoting bio-organic compound fertilizers: Bio-fertilizers contain microorganism-activated bacteria. It is a “four-in-one†fertilizer compounded by organic fertilizers, inorganic fertilizers, bacterial fertilizers, and synergists, and realizes the scientific formulation of various fertilizers. , Complementary advantages and mutual benefits, is one of the best fertilizers for balanced fertilizer application in greenhouses. 7. Use vegetable-specific fertilizer as far as possible: Under the premise of implementing formula fertilization, promote special compound fertilizer for vegetables. Specific fertilizers are developed according to the characteristics of different vegetables requiring fertilizers and the status of soil fertilizer supply. The nutrients are more complete, the nutrition is more scientific, the formula is more reasonable, and the specificity is stronger. After application, the yield and quality of greenhouse vegetables can be significantly improved. Accelerate Freeze Dried Fig is made of selected ripe figs. The international advanced ultra-low temperature FD technology is adopted to sublime the water content of fruit, without changing the fruit color, shape and flavor. Retaining the original nutritional and medicinal components, without any additive, pigment, sweetener or preservative, it is the best-quality dried fruit. 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