摘要
为研究温室内光照及空气温湿度的变化趋势,指导温室作物生产,以下沉式日光温室为研究对象,利用无线传感器网络实现光照强度与空气温湿度的实时采集,分析在夏季日光温室内部光照强度及空气温湿度的变化趋势,得到靠近温室内南侧测点(S)、北墙测点(N)、东侧测点(E)、西侧测点(W)、中部测点(M)与室外测点(O)的光照强度变化趋势,以及温室跨度1/2截面内不同位置处的空气温湿度变化特征。实验结果表明,夏季晴朗天气下,温室内外日间平均光照强度由大到小依次为O(68267 lx)、S(53359 lx)、M(44770 lx)、W(44141 lx)、N(38907 lx)、E(28615 lx),南北方向光照环境较东西两侧光照环境更为接近,温室内日间平均温度高于35℃,日间平均相对湿度低于50%,不利于作物生长。夏季阴天时,温室内整体光照较弱,温室整体温、光、湿环境较晴朗天气下均匀,靠近北墙区域的光照明显不足(日间平均光强7985 lx)。
Light is the main energy source of solar greenhouse.The change of outdoor light and temperature will cause internal environmental parameters.Light intensity,air temperature and humidity are important factors affecting the rate of plant photosynthesis.Therefore,it is important to study the changing trend of light intensity,air temperature and humidity in greenhouse to guide crop production in greenhouse.In this experiment,the sunken solar greenhouse was taken as the research object,and the wireless sensor network was used to realize the real-time collection of light intensity and air temperature and humidity.Through the analysis of the variation trend of the light intensity,air temperature and humidity,the variation trend of light intensity at the observation points can be obtained,which were located on the south(S),north wall(N),east(E),west(W),middle(M)of the greenhouse interior and outdoor(O)of the greenhouse,also the variation characteristics of air temperature and humidity at different locations within 1/2 section of the greenhouse span.The results showed that the average of light intensity at daytime during summer sunny weather in descending order was as follows:observation points O(68267 lx),S(53359 lx),M(44770 lx),W(44141 lx),N(38907 lx)and E(28615 lx).The light environment in the north and south direction was more similar to that in the east and west sides.The average of temperature at daytime in the greenhouse was higher than 35℃,and the average of relative humidity at daytime was lower than 50%,which was harmful to crops.On cloudy days in summer,the overall light in the greenhouse was weak,but the overall temperature,light and wet environment of the greenhouse was more uniform than that on sunny days in summer.In the area around the north wall,the light was obviously insufficient(the average of light intensity at daytime was 7985 lx).
作者
吕欢欢
牛源艺
张漫
李寒
LÜHuanhuan;NIU Yuanyi;ZHANG Man;LI Han(Key Laboratory for Modern Precision Agriculture System Integration Research,Ministry of Education,China Agricultural University,Beijing 100083,China)
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2021年第S01期410-417,共8页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金项目(31971786)
关键词
日光温室
光照强度
空气温湿度
无线传感器网络
solar greenhouse
light intensity
air temperature and humidity
wireless sensor network
