The Management of Fertilizer and Water in Vegetables Should Do a Good Job of "Three Changes Must Be Certain"
In the process of vegetable production, if it is not properly managed, there will be some obstacles to the growth of vegetables. Some soils will have a white “salt layer†on the surface of the soil, or the topsoil will appear light red, and some will have green penicillium layers. They are all different manifestations of soil salinization. Light causes vegetables to stagnate, and severe causes rot or dead seedlings. In order to protect vegetable production from the normal growth and development, and eliminate or alleviate the physiological and biochemical barriers caused by soil, in the management of fertilizer and water, we must pay attention to the implementation of the "three changes must be" technology.
The first is to change the single fertilizer to increase organic fertilizer. Fertilizers are indeed effective, but long-term use of inorganic fertilizers will accelerate the deterioration of soil structure and affect the yield and quality of vegetables. Increase organic fertilizers or use organic fertilizers instead of chemical fertilizers to improve the soil structure and increase the content of organic matter. Secondly, to provide rich nutrients, both large quantities of elements and trace elements. Third, to increase fertilizer and water conservation and fertilizer supply. Ability; 4 can improve the living environment of vegetable fields, and obviously improve the quality of vegetables.
The second is to dilute the soil to deep plowing. Because salt accumulates on the surface of the soil surface with a depth of 5 cm, and less than 25 cm of tillage layer accumulates, deeper tillage is performed after harvesting each vegetable to reduce the salt content of the tillage layer.
The third is to change once over-dressing to a small amount of fertilizer. Too much fertilizer at one time not only increases the acidity or alkalinity of the soil, but also inhibits the growth of vegetables. Top dressings should be applied in small quantities several times, and top dressings should be promoted, especially topdressing nitrogen, potassium dihydrogen phosphate, potassium sulfate, boron, molybdenum and other fertilizers. As these fertilizers can supplement the deficiency of the base fertilizer, the physiological disorders caused by the flail can be alleviated.
Fourth, regular flood irrigation. For the vegetable land with higher salinization degree, in addition to the natural rainfall scouring salt accumulation during the uncovering period, it should be combined with the method of washing drought in the drought-repelling ditch every year. The salt can be discharged at the speed of irrigation, and the salt can be leached under irrigation. Reduce the concentration of soil solution and promote the safe growth and development of vegetables under normal conditions.
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