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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。
In order to explore the environmental advantages of the new hot-dip galvanized long-span double-film double-arch plastic greenhouse, in order to meet the demand of cooling effect in summer, 10m single-span greenhouse was used as a control. Five spans were 20,16,12,10,8m The double membrane plastic greenhouse using ZWSN-CA wireless multi-collector for environmental testing and analysis. The results show that the plastic greenhouse with 8, 16 and 20m span can reduce the air temperature by 1.15, 0.94 and 0.59 ℃, and reduce the soil temperature by 2.98, 2.32 and 3.08 ℃. 12m span plastic greenhouse compared with the other four span air humidity value is small, 28.08%, the remaining five greenhouses no significant difference in humidity, are about 47%. Control greenhouse light intensity was significantly stronger than double-film greenhouse, but 10,16 m span plastic greenhouse light transmission rate than other spans, the average span of more than 8m 2.36,2.08 klx. 10,12,16 m span greenhouse can maintain a high concentration of carbon dioxide. Based on the above five environmental factors, the 16m-span plastic greenhouse can not only maintain high light intensity and carbon dioxide concentration, but also have greater advantages in cooling and moisturizing. In the summer, it is more popularized than the other five greenhouses.