Abstract:

Continuous temperature and light monitoring and typical weather temperature and light analysis were carried out inside and outside of the 8 m single plastic greenhouse for determining the characteristics of temperature and light environment of plastic greenhouse in winter in southern Zhejiang. The results showed that the light intensity of the south of the greenhouse was better than that in the north during the experiment with an increase range of 6.33%-26.68%. The light transmittance in the greenhouse in typical weather accounted for 61.44%-67.38% of the open field. The light transmittance of the greenhouse in sunny days was 3.67% and 9.66% higher than that in cloudy days and light rain days, respectively. During the experiment, the lowest and highest night temperature was 5.88℃ and 13.38℃ respectively in open field, which were 17.51%, 16.67%, 3.43% and 2.54% lower than those of the north and south of the greenhouse. The average night temperature in the greenhouse increased by 4.47% to 8.91% compared with that in the open field under four typical weather conditions.

Key words: Single Plastic Greenhouse, Temperature, Light Transmittance, Winter, Greenhouse Structure, Southern Zhejiang