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中文摘要：
为探索新型热镀锌大跨度双膜双拱结构塑料大棚环境优势,针对夏季对降温效果的需求,以10m跨单膜大棚为对照,对5个跨度分别为20、16、12、10、8m的双膜塑料大棚运用ZWSN-C-A无线多功能采集器进行了环境测试分析。结果表明：8、16、20m跨度塑料大棚可降低空气温度1.15、0.94、0.59℃;同时可降低土壤温度2.98、2.32、3.08℃。12m跨度塑料大棚相较于其它4个跨度空气湿度值小,为28.08%,其余5个大棚湿度无明显差异,均在47%左右。对照大棚光照强度明显强于双膜大棚,但10、16m跨度塑料大棚的透光率较其它跨度大,平均比8m跨度高2.36、2.08klx。10、12、16m跨度大棚可保持较高二氧化碳浓度。综合以上5个环境因子,16m跨度塑料大棚除了能保持较高光照强度和二氧化碳浓度外,在降温、保湿方面具有较大优势,在夏季较其余5个大棚更具有推广性。
英文摘要：
In order to explore the environmental advantages of a new type large span double film arch of plastic greenhouse with hot dip galvanized steel,the requirements of the cooling effect in summer were analyzed.With 10 mspan single film plastic greenhouse as the control,16 m,12m,10 m,8m,20 mas test objects,ZWSN-C-A were used to measure the environment performance.The results showed that 8m,16 m,20mlarge span plastic greenhouse had less air temperature1.15℃,0.94 ℃,0.59 ℃,which reduced soil temperature 2.98 ℃,2.32 ℃,3.08 ℃.12 mlarge span greenhouse compared to other four span of air humidity is minimum,for about 28.08%.Remaining other five greenhouse of humiditythat have no obvious difference,which were about 47%.Light intensity of the control greenhouse was significantly stronger than the double film shed,but the transmittance of 10 m,16mspan plastic greenhouse was more larger than other three ones,which were more 2.36 klx,2.08 klx than 8mgreenhouse.Maintaining a high carbon dioxide concentration was 10 m,12m,16 mdouble film greenhouse.Integrated above five environmental factors,16 mspan plastic greenhouse had the higher light intensity and carbon dioxide concentration,in addition to in the cooling,moisture had a greater advantage in the summer to compare with the rest of the five greenhouses,which was more promotional.
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