The symptoms of yellow leaves, lobule, and drop and fruit drop of vegetables are all related to the deficiency of nutrients, and this phenomenon is prone to spread year by year. According to expert analysis, there are mainly the following reasons. One is even more cloudy days. In cloudy days, the low temperature causes vegetable roots to be injured, affecting their absorption of nutrients and exhibiting symptoms of deficiency of nutrients. In addition, the lack of adequate light during the cloudy days leads to poor crop malnutrition, the inability of carbohydrates to convert, the relatively small thickness of the leaves, the injury of roots (especially the apical roots), browning, and no new roots. If large-fat water management is performed at this time, there are many phenomenon of vegetable rooting, and it is impossible to absorb nutrients normally, and vegetables will inevitably suffer from deficiency of the disease. At this point, spraying leaf fertilizer is the most effective solution. The second is the improper use of trace elements. In order to pursue high yields, some vegetable farmers blindly applied chemical fertilizers to greenhouses, ignoring the application of trace elements, resulting in a generally high nitrogen, phosphorus, and potassium content in soil, and insufficient trace elements. Some vegetable farmers excessively applied trace element fertilizers. Because of antagonism, the absorption of other elements by the root system was inhibited, thus showing deficiency symptoms. Third, the concentration of soil solution in the shed is too high. Due to the large amount of chemical fertilizers used by vegetable farmers all the year round, the concentration of soil solution is too high, the roots of the plants are stunted, and sufficient nutrients cannot be absorbed to supply plant growth. The plants exhibit deficiency of the disease. Fourth, prevention and treatment are inappropriate. Some vegetable farmers saw that the leaves of vegetables were yellow, and they considered it as a lack of fertilizer. Therefore, a large amount of chemical fertilizers were used in a large amount. The result was counterproductive and led to a growing shortage of vegetable deficiencies. Therefore, more guidance should be given to vegetable farmers so that they can distinguish various symptoms of deficiency. Large Health Industry, Rehabilitation Equipment lifting column is a kind of lifting column, It is usually used for furniture and Equipment such as writing desk, Table Lifting Equipment workbench, Lifting Table Customization, display cabinet, etc. It can be adjusted as required. It can be used for Health Equipment Customization. Improve work efficiency and comfort. According to different use needs and structural forms, lifting columns can be divided into the following categories: Lifting Column,Electric Lifting Column,Lifting Columns Telescopic,Telescopic Lifting Columns Suzhou Herstar Medical Technology Co., Ltd. , https://www.hosunherstar.com
1. Electric Lifting Column: The electric lifting column is a lifting column driven by a motor and its height can be adjusted by button control. Electric lifting column speed, good stability, easy to operate, suitable for frequent adjustment of the height of the occasion.
2 manual lifting column: manual lifting column is a kind of column by manually rotating the screw to achieve height adjustment, has the advantages of simple, reliable, economic, suitable for some occasions do not need to adjust the height frequently.
3. Pneumatic lifting column: pneumatic lifting column is a kind of column to achieve height regulation through air pressure. It has the advantages of fast speed, low noise, simple maintenance and so on.