Drip irrigation fertilization technology can bring fertilizer evenly to the roots of crops while irrigation, and realize the integrated management of water and fertilizer. It is characterized by small irrigation flow, low working pressure and accurate irrigation control. Drip irrigation can reduce the humidity of vegetable growing environment, enhance the resistance of vegetables, and thus reduce pests and diseases. Integrated drip irrigation with water and fertilizer can make water and fertilizer supplied centrally and improve the yield and quality of vegetables.
To maintain the soil structure, under the action of traditional irrigation, the protected soil will be washed, compacted and eroded, which will lead to serious hardening, soil will be destroyed to a certain extent, and vegetable water shortage (insufficient water intake) will be manifested externally. Short-term water shortage will cause the stem and leaf color to fade, and the leaf edge will even turn yellow and white; Lack of water for too long will cause dry leaves, dry stems and soft vegetables.
You can check whether there are water drops on the top of the leaves of vegetables on a sunny morning, preferably before the sun comes out. If the surface is not short of water at all, a layer of water vapor and a drop of water represent different states. Winter and early spring, at this time should be less irrigation or no irrigation. If plants are really short of water, irrigate them with a small amount of water, not with flood irrigation, and at noon on a sunny day. From March to June, the outside temperature rises gradually, and the irrigation amount should be gradually increased at this time. The roots of water-deficient vegetables are generally loose and not solid, and even there will be obvious small cracks on the surface. If vegetables are not short of water, the roots are basically firm and hard, not very loose, and there will be no cracks.