Abstract
New types of straw block (types I and II straw blocks) were developed and applied in the north wall of solar greenhouses. The hygrothermal and fungistatic properties of the new types of straw block were researched, and the thermal and wet environment of a solar greenhouse with a north wall formed from new types of straw block (STG) was measured. The thermal properties of the new types of straw block north wall (ST) were higher than those of a porous clay block north wall (CL). The pH values of the extracted liquids of the types I and II straw blocks were 13 and 11.5, respectively, making it difficult for mycelia to grow on these blocks. At the depths of 0, 80, 160 and 240 mm, the temperatures of ST were 0.5, 0.6, 0.8 and 1.2℃ higher than those of CL, respectively. Compared to the solar greenhouse with a porous clay block north wall (CLG), the air temperature of STG was 0.5℃ higher during nighttime, and the average relative humidity was 5.3% lower during nighttime. The research shows that the STG has better thermal and wet environment characteristics, and it is durable and suitable for the growth of crops.
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