The main ways to return corn straw to the field are direct field return and indirect return. With the promotion of mechanized harvesting and straw crushing machinery operations, the area for direct return of corn straw is gradually expanding:
1. Straw crushing and covering the field. The harvested straw is crushed on the spot by using a combine harvester or a straw comminution machine at the time of corn harvesting, and is evenly sprinkled on the surface to cover the field, and the no-tillage sowing machine is used to directly sow the next crop. The straw should be crushed and evenly crushed, with a length of no more than 10 centimeters and spread evenly, leaving a height of less than 15 centimeters.
2, straw crushed and landed. When ploughing and ploughing land is used, the depth of ploughing is not less than 20 cm. When the plough is buried, the plough depth is not less than 15 cm. After cultivating, the soil is thoroughly emptied, soiled and leveled, and the soil caused by the straw is eliminated. Sowing and growing crops create conditions.
The amount of straw returned to the field can be increased by applying 0.5% to 1% of the amount of dry straw to apply nitrogen fertilizer to adjust C/N.
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Under the action of gravity, water flows from top to bottom, forming a water film on the surface of the corrugated fiber of the wet curtain. It and the fan form the Air Circulation System .When the fast flowing air passes through the wet curtain, the water in the water film absorbs the heat in the air and evaporates and takes away a lot of latent heat, so that the temperate of the air passing the wet curtain is lowered, so as to achieve the aim of cooling.Widely used in Tomato And Cucumber Greenhouse and Glass Greenhouse
Working principle: "water evaporation absorbs heat"
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