Correct methods for applying flushing fertilizer to greenhouse vegetables
How should greenhouse vegetables be given flushing fertilizer? Please advise. In greenhouse vegetable production, many farmers apply flushing fertilizer too frequently and in excessive amounts, often causing soil compaction, root rot, root suffocation, and plant wilting, which seriously affects farmers' economic returns. For this reason, it is recommended that in greenhouse vegetable production, fertilization should achieve the "four combinations."...
How should greenhouse vegetables be given flushing fertilizer? Please advise
In greenhouse vegetable production, many farmers apply flushing fertilizer too frequently and in excessive amounts, often causing soil compaction, root rot, root suffocation, and plant wilting, which seriously affects farmers' economic returns. For this reason, it is recommended that in greenhouse vegetable production, fertilization should achieve the "four combinations."
(1) Combine topdressing with flushing fertilizer and choose high-quality fertilizers. Use multi-element compound fertilizer as the main type, and adopt a method combining topdressing with flushing application. On the one hand, this solves the fertilizer demand of surface roots; on the other hand, topdressing can activate the soil layer, increase roots, and buffer fertilizer efficiency.
(2) Combine organic and inorganic fertilizers. Many farmers use chemical fertilizers as the main type whether for flushing application or topdressing. Although some flushing fertilizers contain humic acid, inorganic fertilizers are mostly nitrogen fertilizers such as ammonium nitrate and urea. They promote rapid growth in the short term, with large leaves and long stems, and appear to grow well on the surface, but they lack long-term effects. Attention should be paid to the balance between vegetative growth and reproductive growth. Some flushing fertilizers are also made from cake fertilizer (hemp seed cake, cotton cake, bean cake) and diammonium phosphate (or ammonium nitrate), plus fertilizers such as potassium chloride and potassium sulfate, but the effect is not ideal because cake fertilizer requires a certain amount of time to ferment.
(3) Combine biological fertilizer with chemical fertilizer. Biological fertilizer contains more than a dozen kinds of beneficial bacteria and has the effect of activating soil and regulating nutrients. When applied together with inorganic fertilizer (chemical fertilizer), it can relieve fertilizer damage, increase soil organic matter, and promote root development.
(4) Combine large-water and small-water flushing application. Many farmers use large amounts of water with fertilizer whether during the seedling stage or the fruiting stage, making the fertilizer solution too strong and causing seedling diseases, root rot, and root suffocation. Whether biological fertilizer, organic fertilizer, or chemical fertilizer, fertilizer should be applied according to the seedlings and in reasonable amounts. "Small fertilizer water nourishes roots, medium fertilizer water protects seedlings, large fertilizer water nourishes fruit" is exactly this principle. If the soil is cultivated and loosened in time after fertilizing and watering, the effect will be even better.
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Get more fertilizer application techniques