What is the key to the conservation of root systems in greenhouse vegetable production? The author believes that the most important thing is watering. Speaking of watering, even decades of old "style", it is often difficult to grasp the degree of watering.
In the production practice, many vegetable farmers will deeply feel that root disease has been particularly serious after watering. In fact, the pathogenic bacteria in the soil has always existed, and it will not be greatly increased because of watering. So why does the disease occur after watering? To make a simple analogy, it is not terrible for people to get flu. What is terrible is complications. By the same token, it is not terrible that the roots of plants are rooted after watering, and it is fearful that the resulting root diseases are caused. After watering, due to the lack of oxygen in the soil, the activity of the root system of the plant weakened, especially when the roots were more watered and the roots were more viscous, the root resistance was greatly weakened, and the pathogens in the soil were destroyed and the disease was caused. It can be said that if there are no roots caused by watering, there will be no large-scale outbreak of root disease.
To control root diseases, we must start with reasonable watering, and the key point is to avoid rooting caused by watering. When watering, it is necessary to control the amount of watering, so that the water is dry to the ground, to avoid the accumulation of water for more than half an hour, to ensure adequate supply of oxygen in the soil to maintain the root system.
New irrigation methods, such as drip irrigation, slowly infiltrate the soil in the form of water droplets. The amount of water per unit of time is small, the damage to the soil structure is light, and the amount of watering can be controlled at will. It should be said that roots should not appear. However, the author found that drip irrigation in the use of more areas, drip irrigation in the use of more problems. Drip irrigation generally does not appear water accumulation, but it does not mean that there will not be roots, nor does it mean that the amount of watering can be arbitrarily increased. The author had met with drip irrigation at Heguan Town and Dongxia Town in Qingzhou County, which used 40 to 50 kWh of electricity before pouring over 1 mu of shed. As a result, the roots of shed, eggplant, cucumber, etc. were severely damaged, and the growth was weak and the yield was low. There are many dead trees.
In addition, it is also important to increase organic fertilizers, improve soil, and enhance soil permeability. This ensures that even if the amount of water is large, it will not cause root collapse due to lack of oxygen in the soil.
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