In the production of shed vegetables, many peasants have applied excessive amounts of fertilizing materials, resulting in excessive amounts of soil, often causing soil compaction, rot, rooting, and plant wilting, which seriously affect the economic efficiency of farmers. For this reason, it is recommended that fertilization should be “four combined” in the production of shed vegetables.
(a) Top dressing and fertilization combined use of high-quality fertilizer. With multiple compound fertilizers as the main method, the combination of topdressing and rushing is used. On the one hand, the problem of surface roots need fertilizer is solved. On the other hand, top dressing can activate soil layers, increase root systems, and alleviate fertilizer effects.
(B) Organic and inorganic combinations Many farmers use chemical fertilizers, whether they are rushing or applying. Although some fertilized fertilizers contain humic acid, inorganic fertilizers mainly include nitrogen fertilizers such as ammonium nitrate and urea. In the short term, they grow fast, have large leaves, and have long stems. They look good on the surface but lack long-term effects. Attention should be paid to the balance between vegetative growth and reproductive growth; some fertilization also consists of cakes (hempseed cake, cotton cake, bean cake) and diammonium phosphate (or ammonium nitrate), and potassium chloride, potassium sulfate and other fertilizers. The reason for this is that it takes a certain amount of time for the cake to ferment.
(3) Bio-fertilizer combined with chemical fertilizer Bio-fertilizer contains more than ten kinds of beneficial bacteria, which have the effect of activating soil and regulating nutrients. In combination with inorganic fertilizer (fertilizer), it can relieve fertilizer damage, increase soil organic matter, and promote root development.
(4) Combination of Dashui and Xiaoshui Chong Shi Many farmers, regardless of the seedling stage and the result period, use large-scale water and fertilizers to make the fertilizer and water excessively large and cause disease, rotten roots, and roots. Regardless of bio-fertilizers, organic fertilizers, and fertilizers, they should all be seen as seedlings and fertilizers, and they should be used in reasonable amounts. "Small fertilizers to raise roots, water and fertilizer in the seedlings, big fertilizer fruit," is this truth. If the fertilizer is applied, the cultivating soil in time will be better.

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