摘要
为了获得桂南地区冬季不同结构塑料大棚小气候变化特征,给农事生产及大棚管理提供科学依据,本研究对3种常见结构塑料大棚内外的冬季小气候进行了观测并做了对比分析。结果表明,3种结构大棚内相对照度为70%～80%,其值大小与大棚体积呈反相关;棚内日平均气温增温1.3～3.2℃,但晴天夜间18:00～6:00单棚出现0.3～0.9℃的轻微"温度逆转"现象;棚内气温日较差高于棚外2.3～7.9℃;0～20cm土层地温平均增温3.2～3.5℃;棚内0cm地温日较差大于棚外-11.4～1.4℃,其值大小与大棚体积呈反相关,除了多云天的单棚及阴天的单棚与三连栋棚内日较差稍大于棚外外,其它情形棚内日较差均小于棚外;棚内日平均相对湿度高于棚外3%～23%,其值大小与大棚体积呈正相关。通过数理分析,建立了棚内外150cm光照、气温、空气湿度的相关方程。
The outside and inside microclimate in plastics greenhouse with three common structures in southern area of Guangxi in winter were studied for providing scientific guidance to agricultural production and greenhouse management. The results indicated that the relative illumination of the three big awnings were in the range of 70%-80% which were negative correlation with the volume of big awning. The increased daily mean temperature in awnings were 1.3-3.2℃, but a minor ＂temperature reversal＂ in single-shelf at 18：00 to 6：00 with 0.3-0.9℃ was observed. The daily range of temperature inside was 2.3-7.9℃ higher than that of outside..The ground temperature of 0-20cm soil layer raised 3.2-3.5℃, but the inside ground daily range of temperature at 0cm was warmer than that of outside in -11.4-1.4℃ which was also negative correlation with the volume of big awning. The daily range of temperature inside was normally lower than outside, except in single or 3 multi-span awing with cloudy weather. The daily average relative humidity in the awning was 3%-23% higher than outside which was a positive correlation with the volume of big awning. The relevance equation about the illumination, temperature and air humidity inside and outside of awning at 150 cm height was established by the data analysis.
出处
《湖北农业科学》
北大核心
2009年第3期732-737,共6页
Hubei Agricultural Sciences
基金
广西农业职业技术学院自然科学研究2006年立项重点课题[桂农职院发(2006)5号]
关键词
不同结构
大棚
小气候
对比
相关方程
different structure
greenhouse
microclimate
comparison
relevance equation
