Abstract: Southern-type solar greenhouse was a newly developed greenhouse with good effect of heat insulation during winter time. Its typical dimension was 50 m in length, 8 m in width, 1.7 m in southern wall height and 3.85 m in northern wall height. The eastern, western and northern walls were constructed with thermal insulated wall composed of supporters, foam boards and films, which could be disassembled after use. The southern side was constructed with roof, supporter, film, outside coverlet and coverlet roller. In order to increase the ventilation capability, the ventilation windows were located on the southern, northern roof and northern walls. The diurnal variation of light intensity, temperature showed relatively lower in the early morning and evening, and higher in the midday, while the relative humidity showed the reverse change trend. Compared to the normal greenhouse, more sunlight entering could be captured in the southern-type solar greenhouse. The inside temperature of southern-type solar greenhouse could be maintained above 5 ℃ during night in winter and the temperature difference between inside and outside could achieve 4.7-12.7 ℃ due to the good heat insulation of external heat preservation quilt. During the sunny days, the inside temperature increased rapidly and might be above 40℃, so ventilation cooling was demanded. Due to the good sealing performance, the relative humidity in southern-type greenhouse was high, and the air exchange management was also necessary. The southern-type solar greenhouse was a good growing environment for tomato in the period of January, February and March, in which the growing and harvesting time could be prolonged for one month, and the yield could increase 20%-50%.

Key words: southern-type solar greenhouse, facility, structure, temperature, humidity