关键词: 广西贺州, 温室, 空气湿度, 时空变化

Abstract: Based on the observation of air humidity inside the plastic greenhouse locates at Hezhou modern agricultural science and technology demonstration garden of Guangxi automatic region, south china, the time-space variation including day-period and long-period of relative humidity and absolute humidity was probed .The results indicated that :the first, obvious changes of relative humidity were found from 8:00 to 19:00 on the sunshine and the cloudy sky inside the plastic greenhouse ,taking on single vale curve, but no obvious changes of relative humidity were found in the rain, high numerical value was maintained all day long; the daily variation curve of absolute humidity took on double peak shape on the sunshine, but single peak shape on the cloudy sky and in the rain ,and the peak value was emerged at 10:00-14:00,9:00-18:00,8:00-18:00 respectively. The second, no obvious difference of monthly mean relative humidity among superstratum, middle-level and substory of the plastic greenhouse was found in the same and different months of the same moment; but obvious difference of monthly mean relative humidity of the same stratum at different moments of the same month; obvious difference of monthly mean absolute humidity of the same stratum was found in different months of the same moment, taking on rising trend gradually from December to March.

Key words: south china, south china, plastic greenhouse, air humidity, time-space variation