Authors

Abstract

A sunken solar greenhouse is the original type of greenhouse in China, its soil wall thermal storage performance is better and low cost. Higher benefits of stereoscopic planting in sunken solar greenhouses, while repeated use of the substrate can produce pathogens, so high-temperature smothering is used for sterilization in the summer months of June to August. To investigate the mechanism of indoor temperature and humidity variation and fungicidal effect in a sunken solar greenhouse, a single cross-sectional test of temperature and humidity in sunken solar greenhouse during the smothering period was conducted using wireless sensors. The results showed that: The maximum value of indoor temperature at noon was 69.5°C the temperature value of all measurement points was greater than 50°C for 3h, when removing the measurement points at the upper surface of the ground, the relative humidity value of other measurement points was less than 60% for 5h. During the daytime period, when the indoor temperature is greater than 28°C in the interval 7:00-12:00, the initial relative humidity value of each measurement point is located at 70%-85%; when the weighted temperature of each measurement point starts to rise at a rate of 1.1°C/10min, the weighted humidity of each measurement point declining is 1.3%/10min; the determination of the rate of change of indoor temperature and humidity during the daytime and the starting value can provide a basis for indoor plants to take measures to sterilize at high temperature.

Abstract in Chinese

下沉式日光温室是我国原创型式的温室，其土质墙体储热性能优于钢筋混凝土材料且造价低廉，比一般温室的保温效果好，在生产中大面积推广建设。在下沉式日光温室中采用基质立体栽培收益较高，而基质重复使用会产生病菌，因此在夏季6-8月份采用高温闷棚杀菌。为探究下沉式日光温室室内温湿度变化机制和杀菌效果，利用无线传感器对闷棚期下沉式日光温室的温湿度进行单横截面试验，结果显示：室内温度在中午时刻的最高值为69.5℃，此时各测点相对湿度值位于40%～50%之间，所有测点温度值大于40℃的时长为9h，所有测点的温度值大于50℃的时长为3h，去除地面上表面处测点时，其他测点的相对湿度值小于60%的时长为5h，其他测点的相对湿度值小于50%的时长为2.2h；白天期间，在7:00-12:00时间段内，当室内温度都大于28℃，各测点的初始相对湿度值位于70%～85%，当各测点加权温度以1.1℃/10min速度开始上升，各测点加权湿度的下降速率为1.3%/10min，12:00时刻室内温度值在46～60.1℃之间，各测点湿度值38.4%～46.7%，对于白天期间室内温湿度变化速率和起始值的确定，可为室内有植物采取闷棚的措施提供依据。