During the growth of vegetables, symptoms such as iron deficiency, boron deficiency, and magnesium deficiency often occur, affecting the growth of vegetables. In fact, the appearance of various deficiency symptoms is closely related to the deterioration of soil conditions. Problems such as high salt content in the soil, poor air permeability, high nitrogen fertilizer, and under-fertilized manure can all affect the absorption of nutrients by the root system and cause the plant to exhibit symptoms of deficiency such as yellow head and yellow leaves.
To avoid this situation, it is recommended that vegetable farmers pay attention to the following issues in production:
Bottom application of manure must be mature.
At present, many vegetable farmers use a large amount of dried chicken manure as a base fertilizer. The manure produces a large amount of organic heterocyclic substances during the fermentation process. This substance is prone to yellow heads after being absorbed by the plants. It is recommended that manure applied at the bottom of the vegetable farmer must be fermented and rotted well before planting the vegetables.
Dedicate hoe frequently to increase soil permeability.
Qin hoeing can break the ground plate layer, improve soil permeability, promote deep rooting, and also play a role in weeding. Generally one month after planting vegetables, hoe every 3-5 days. After watering, the surface of the soil is compacted and the permeability is greatly reduced. After each watering, it should also be hoeed in time. The hoe should not be too deep to avoid a lot of damage to the roots of the vegetables, but it should not be too shallow to play the role of loosening the soil. Generally, the depth of the hoe is 3-5 cm.
Reduce the amount of chemical fertilizer and increase the application of humic acid and biological bacterial fertilizer.
Some vegetable farmers often have moss on the ground surface after watering, and red frost on the ground during drought. This is a manifestation of high soil salt content and poor permeability. It is recommended to gradually reduce the concentration of salt ions in the soil solution and improve the permeability of the soil by reducing the use of chemical fertilizers, adding humic acid and biological bacterial fertilizer. High-quality humic acid has the core role of promoting the formation of soil aggregate structure. After the formation of the granule structure, the benefits are many: first, the soil condition improves, which can greatly improve the adsorption of soil ions, reduce the content of salt ions in the soil solution, reduce the degree of soil salinization, and reduce the damage to the root system . The second is to improve soil microbial and enzyme activity. The granule structure is formed and the permeability becomes better, which can promote the activity of soil microorganisms, increase the number of soil microorganisms, and enhance the activity of soil enzymes. Generally speaking, it can reduce the salinization of soil, reduce the compaction and improve the activity of root system by using it twice continuously. Humic acid can improve the structure of the soil, but the reproduction of microorganisms takes time. While applying humic acid, it can be used to supplement the beneficial bacteria in the soil and complement each other.
Foliar supplement.
After the vegetable lacks symptoms, in addition to maintaining the root system, the vegetable farmers should judge which element is caused by the deficiency, and spray the relevant foliar fertilizer in time, once every 7 days, spray 2-3 times, Quickly supplement nutrition to relieve the symptoms of deficiency.
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