Effect of Different Control Combinations on Temperature and Humidity of Greenhouse in Southern China

摘要：

A greenhouse experiment was carried out at water-saving park,Hohai University in the summer of 2005.Four control measurements were considered: outer coving,up window opening,top sprinkler and wetting wall-air circulation.5 control combinations were considered: control ① (up window opening + outer coving),control ② (top sprinkler + outer coving),control ③ (wetting wall-air circulation + outer coving),control ④(wetting wall-air circulation + top sprinkler) and control⑤ (wetting wall-air circulation + outer coving + top sprinkler)for the study.The results show that when the air temperature maintained at 35℃～39℃ and 50%～75% for relative humidity outside the greenhouse,the air temperature could reach 47.3℃～57℃ and 30%～55% for relative humidity inside the greenhouse.When there was no ventilation and cooling system,temperature inside the greenhouse was 12.3℃～18℃ higher than the outside while the relative humidity is 20% lower.After every control was performed,there was a marked drop in air temperature and clear rising in relative humidity inside the greenhouse,and the largest drop in air temperature was obtained under control ⑤which maintained 33.5℃ within 10 rain.and 32℃ within 60 min.and 34.8℃ within 60 rain.For control ①.The level of drop in temperature was as follows: control ⑤＞contr01 ④＞control ③＞control ②＞control ①,indicating that the cooling system had played an important role combining with other measurements in air temperature control.The test also shows a rapid rising in the relative humidity inside greenhouse when 5 controls performed,the highest rising in relative humidity is control ⑤,with 25.2% rising;and 9.4 rising for control ①,The increase lever in relative humidity is as follows: control ⑤＞control ④＞control ③＞control ②＞control ①.The above study shows: the lower the temperature,the higher the relative humidity.Therefore,application of different control combination must react the plant requirement in air temperature and relative humidity at different growth stage.

关键词： greenhouse temperature relative humidity control method effect

作者: Xing Wengang Li Honglian Zhang Juan Kou Lijuan Jiang Yuanxun

作者单位: Department of Agricultural Engineering,Hohai University,Nanjing,210098,China

会议类型: 国际会议

会议名称: International Conference on Effective Utilization of Agricultural Soil & Water Resources and Protection of Environment and the 4th Annual Academic Conference of Chinese Society of Agricultural Soil and Water Engineering

会议地点: 南京

会议语种:英文

页码: 567-571

在线出版日期: 2006-08-16（万方平台首次上网日期，不代表论文的发表时间）