When the shade net is closely attached to the shed surface to cover the shade net, it must be separated by a certain distance, and put on two bamboo laminar soil bags on the bamboo pole. The front edge of the shed must also be placed on the abandoned grass raft at a certain distance. The purpose is to allow The shade net does not adhere to the film. It is recommended that the shade net be kept at a distance of 0.5 to 1 meter from the shed to facilitate air flow in the greenhouse and reduce the temperature in the shed.
Shading time should not be too long Sunny weather, shade nets can be used in the sunny light of the most intense stage, the specific time of control in the morning from 11:30 to 14:30. Of course, vegetable shading is not immutable, but it is necessary to flexibly grasp the requirements of light intensity and temperature in light of weather conditions, vegetable types, and vegetable growth stages. For shading net shading, generally used sunny cover, cloudy exposing; noon cover, sooner or later exposed; pre-covered, late growth measures.
Chlorine-containing preparation is the earliest and most widely used drinking water disinfectant, which is of great significance for carrying out disinfection and ensuring disinfection effect. Chlorine in drinking water
Effective chlorine is a method to characterize the oxygenation capacity of chlorine-containing disinfection liquid with chlorine gas as the standard. The effective chlorine content in disinfectant venom is taller, disinfect ability is stronger, kill
Kill microorganisms more thoroughly. Residual chlorine refers to the residual chlorine content in the water after the disinfectant has been used for a certain period of time. If sufficient residual chlorine is maintained after chlorination of the water,
It shows that not only the disinfection effect is reliable, but also the continuous disinfection effect. This speed test paper is a kind of broad-spectrum chlorine test paper, used to determine the disinfectant
Whether the effective chlorine content reaches the disinfection application value, whether the residual chlorine content in the water can ensure the disinfection effect and whether the concentration is too high and affect the sensory properties of the water is very important
To cause secondary chemical pollution .
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