Preparation of greenhouse seedbeds

Using nutritious soil seedlings or sowing seedlings, the well-matched nutritious soil can be laid directly on the seedbed. The specific method is to dig out the original soil in the seedbed for about 10 centimeters, and flatten the bottom, a few days before sowing. Fill in 12 cm thick nutritious soil to make sure that it is 10 cm thick. Melon and legume vegetables are generally not divided into seedlings during nursery. It is better to use seedlings for nutrition. The nutritious soil can be loaded into the nutrient bowl, and then the nutrients can be tightly packed on the nursery bed under the excavation. The gap between the pots should be sealed with nutritious soil to prevent running after sowing.

Water Filters

Water filter is one of the most common pretreatment devices in water treatment. Its function is to filter the floating matter, colloid, particle and so on in the liquid, which can effectively guarantee the service life of the latter stage equipment and improve the effluent quality. Water filters can be classified into three categories: sewage treatment plant, raw water treatment device, water purifying device and circulating water filter device.

The water filters can be divided into: pipeline filter, automatic water filter, fine filter, special medium rich night filter. Water filter can be used as water treatment equipment for metallurgical industry, food industry and power electronics industry.

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