关键词: 日光温室, 乌鲁木齐, 早春, 光温环境

Abstract:

In order to strengthen the control of light/temperature environment in greenhouse and promote the rational vegetables production in Urumqi solar greenhouse during spring，this paper tested the indoor soil temperature，air temperature of different height and positions，solar light dynamic change，wall temperature and heat flow dynamic change in Urumqi under typical weather condition during spring．The results showed that in Urumqi the light condition inside of solar greenhouse was better．In a sunny day from 12：00 to 16：00，the highest illumination could reach 55 554 lx and the highest temperature was up to 48 ℃．But the indoor light distribution was uneven．In a sunny day，illumination intensity at the front part was higher than that at the rear part by 8 000-12 000 lx．The illumination intensity at 150 cm height was averagely higher than that at 50 cm height by 10 000-16 000 lx，showing the trait of the more closer to greenhouse thin film，the higher illumination intensity．Judging from the greenhouse span，in sunny days the greenhouse temperature at the rear part was slightly higher than that at middle and front part．The greenhouse back wall has heat preserving and heat storaging ability．The heat storage capacity per unit wall area was 1.97 MJ · m^-2．The heat releasing quantity was 0.79 MJ · m-²，which was 40.10% of the heat storage capacity．The soil temperature changes had obvious hysteretic nature，and along with the soil depth increasing，the hysteretic time would also be increased．

Key words: Solar greenhouse, Urumqi, Early spring, Light and temperature environment