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研制新建自然光气体熏蒸平台主要用于开展大气环境变化对作物影响的研究。该平台采用分布式拓扑结构,通过监测系统实时探知温度、湿度、光照、压力以及目标气体浓度的变化,利用温度、湿度调控系统和布气系统实现对外界环境的动态模拟,使气室内的气象因子与室外基本一致,并使气体浓度达预定目标要求。平台设置室外对照(Ambient)、室内对照(CK)、高浓度臭氧([O3])、高浓度二氧化碳([CO2])和高浓度O3和CO(2[O3×CO2])5个处理,其中室内对照实时模拟室外环境,[O3]处理为Ambient的1.6倍,[CO2]处理比Ambient高200ppm。2011年水稻生长季气室运行结果表明,[CO2]和[O3]控制精度在90%以上的时间占总布气时间的比例分别达95%和80%以上,温度、湿度和大气压力控制精度在90%以上的时间均占总运行时间的95%以上,平台光照控制精度在90%以上的时间占总运行时间的75%以上。整个布气期间,CO2和O3浓度平均控制目标完成比(target achievement ratios,TAR)分别为1.01和1.00,温度、湿度、光照和大气压TAR分别达1.01、0.99、0.96和1.00。稳态熏蒸测试结果表明,气室内O3、CO2、温度和湿度的水平分布和垂直分布均匀,控制稳定。
Development of new natural gas fumigation platform is mainly used to carry out atmospheric changes in crop research. The platform uses a distributed topology to detect the changes of temperature, humidity, light, pressure and target gas concentration in real time through the monitoring system. The temperature, humidity control system and distribution system are used to simulate the external environment and make the meteorological factor Basically the same with the outdoor, and the gas concentration up to the desired target. The platform was set up with 5 treatments: Ambient, CK, O3, CO2, and O3 × CO2. Indoor Control Simulates the outdoor environment in real time, [O3] 1.6 times as Ambient and [CO2] 200 ppm more than Ambient. The results of gas chamber operation in rice growing season in 2011 showed that the control precision of CO2 and O3 was above 95% and over 80% with the control accuracy over 90%, and the control precision of temperature, humidity and barometric pressure In more than 90% of the total operating time accounted for more than 95% of the platform lighting control accuracy of more than 90% of the total operating time of more than 75%. During the entire deployment period, the average TAR of control CO2 and O3 concentrations was 1.01 and 1.00, respectively. The temperature, humidity, light and atmospheric TAR were 1.01, 0.99, 0.96 and 1.00, respectively. Steady state fumigation test results show that the gas chamber O3, CO2, temperature and humidity horizontal distribution and vertical distribution, control and stability.