【摘要】 为了提高大棚揭闭膜气象服务的针对性,对武汉城郊冬春季棚内外气温、地温进行了逐时对比观测试验,利用相关分析及逐步回归分析方法,分3种天气类型对棚内气温、地温观测数据进行了计算分析。结果表明,在晴好天气下大棚、双层膜最高气温分别比棚外大气最高气温高20、24℃左右,夜间温度分别比棚外大气高0.8～3.5℃、3.5～6.5℃,棚内温度日较差在晴好天气下高达30～35℃,气温变化剧烈,一天内可能既要防范高温热害,又要防御低温危害。白天棚内气温与大气温度、太阳高度角关系密切,夜间气温以及10cm地温与大气温度相关显著,并由此建立了棚内气温、地温统计数学模型。利用该模型可以准确地推算或预测大棚内逐时气温、地温变化,为菜农提供大棚揭闭膜气象服务。更多还原

【Abstract】 In order to improve the meteorological service on using of plastic film house,some contrast observations on hourly ground temperature and air temperature between inside and outside plastic film house were fulfilled in Wuhan,China.Based on the observation,the microclimate characteristic under plastic film was analyzed and some equations about the air temperature and ground temperature under plastic film and various weather conditions were established by using correlation analysis and stepwise regression analysis.The analyzed results indicated that the daily maximum temperature under plastic film or double-layer film was correspondingly higher by about 20℃ or 24℃ than that outside in the daylight in clear days.The averaged temperature under plastic film or double-layer film was correspondingly higher by 0.8～3.5℃ or 3.5～6.5℃ in the nighttime.Because the daily range of temperature change could be about 30～35℃ in clear days,so that a high temperature damage and a low temperature damage should be both prevented.Correlation analysis showed that the air temperature under plastic film was highly related to air temperature and solar altitude.The air temperature at night and the ground temperature of 0～10 cm soil layer were also highly related to air temperature.As a result,some equations about the air temperature and the ground temperature under plastic film were established,which can be used to derive and predict the hourly air temperature and ground temperature accurately.These equations can be utilized for the vegetable production meteorological services under plastic film conditions.更多还原