Construction and Evaluation of Transfer Function of Marginal Soil Temperature on the South Side of Greenhouse under Different Linings

The marginal soil temperature on the south side of a greenhouse remains at low temperatures in winter for long periods, which affects crop growth and land-use efficiency, it is great significance to grasp influencing factors change improve greenhouse. This study was conducted typical cold arid area northern China used Grey Relational Analysis (GRA) method, relational degree between environmental under different lining structures analyzed, established transfer function. results show that had greatest correlation with humidity air inside outside greenhouse, second relation outdoor temperature; structure could effectively reduce Polystyrene extruded board (PEB) greater reduction than other materials test. Through verification analysis, mean absolute error 5 cm less 0.85 °C, average 15 0.57 25 55 0.2 °C. In conclusion, constructed function be predict variation trend temperature, PEB material good thermal insulation.