1. Deep-sweeping farmer fertilization is the foundation to eliminate soil compaction and increase the living soil layer. At the same time as the deep plowing, a large number of farmyard manures are applied not only to provide nutrients for long-term and multi-element crops, but also to improve the soil structure, improve the physical and chemical properties of the soil, and provide good permeability and buffering capacity for the growth of vegetables. Strong soil conditions. 2. Breeding multiple seedlings and protecting seedlings The basic root system of most vegetables is formed during the nursery period. During the nursery period, cultivating seedlings with well-developed root systems and protecting these root groups during the nursery process and planting and transplanting will not only facilitate the growth of seedlings, but also play an important role in the future growth and development. From the point of view of mulching, it is necessary to grow seedlings in containers such as nutritional bowls, plastic buckets or paper bags. When seedlings are planted and seedlings are planted after seedlings, they can induce new roots and deep rooting. 3. Formulating scientific fertilization Different fertilizers have different effects on the development of root systems. For example, calcium directly affects the growth of root apical meristems, zinc determines the growth rate of root tips, and phosphorus promotes the division and proliferation of root cells. stretch. Understand this principle, regardless of seedbed fertilization, or cultivation of fertilization should pay attention to the application of superphosphate and zinc sulfate. If a certain amount of edible vinegar is incorporated into the calcium superphosphate fertilizer, calcium acetate having a certain degree of solubility can be formed, and the calcium absorption of the crop can be enhanced. 4. Pay attention to protect the root system. In the course of its life, the root system will be damaged due to low temperature, high temperature, salt accumulation, fat burning and mechanical damage. At low ground temperature, roots and cold roots can occur. High temperatures can cause the roots to age too quickly. The high solution concentration of the soil will cause damage and inhibition of the apical and root hairs, so that the absorption capacity of the root system will be greatly reduced, and inappropriate fertilization or improper cultivation of loose soil may directly damage the root system. Therefore, in the greenhouse vegetable production, On the basis of deep turning to improve soil and organic fertilizer, timely planting, appropriate planting (sowing), practical cover and removal of plastic film, scientific fertilization and tillage soil, these are the necessary measures to protect the root system. 5, Opportunity to promote the recovery of the root In the long-term cultivation of greenhouse vegetables in a certain period of time or after exposure to adverse environmental conditions such as low temperature, in order to promote root recovery as soon as possible, generally have to wait for irrigation agent or calcium, phosphorus, zinc compound fertilizer. 3 Ply Breathable Face Masks,Non-Woven Disposable face Mask,Medical Disposable Face Mask,Medical Disposable Face Mask Dongguan Keyutai Mask Co., Ltd. , https://www.maskkytai.com