In winter, there are many requirements for watering vegetables. In addition to the water required for the normal growth of vegetables, it is more important not to increase the humidity in the shed or to hurt the roots. In this regard, it is recommended that conditional vegetable farmers use drip irrigation under film to irrigate the sheds where drip irrigation is not installed in order to minimize the impact of watering on the root system and the small environment of the shed.
In order to avoid a large pit under the water outlet after watering, many vegetable farmers have always been accustomed to watering on membranes. Although watering on the film can indeed avoid rushing out of the big pit and exposing the root system, this method of watering does more harm than good:
First, the humidity in the shed was increased. Watering from the film, although the water can seep into the ground along the holes in the film (holes left around the root system when the film is laid), there will still be a large amount of water on the surface of the film, and this part of water will cause the shed The increased humidity in the air provides favorable conditions for the occurrence of some pests.
Secondly, it is easy to cause insufficient nutrient supply. During the fertilization, some fertilizers remain on the mulch. These fertilizers cannot be absorbed by the root system, which not only causes waste, but also easily leads to insufficient nutrient supply. Even if the next watering may flush the fertilizer to the root system, it is unavoidable. Uneven fertilizer affects the growth of plants.
Third, soil compaction is impermeable. The biggest disadvantage of watering on the film is that the soil is tight and airtight. The mulch film is attached to the surface, which affects the permeability of the soil. Over time, the root system is not ligated, hovering on the surface. When encountering bad weather such as low temperature, it is easy to hurt the root and affect Normal plant growth. In this regard, it is recommended that vegetable farmers use watering under the film to support the film with a small bow to increase the permeability of the soil, and then place the seedling tray or tile at the water outlet under the film to prevent water from rushing out. Pitfall.
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