| Solar greenhouse is the high-efficiency and types of agricultural facilities,with Chinese characteristics is to realize the important wintering production facilities in north China,this study through the different structure back wall greenhouse heat preservation performance analysis and the impact on the growth of lettuce,exploring different structure back wall of the greenhouse production and economic benefits,provide theoretical basis for select suitable greenhouse in handan area,the results are as follows:1.Through the test results of soil temperature,soil humidity,air temperature and relative air humidity of water module back wall greenhouse（G1）,honeycomb brick structure back wall greenhouse（G2）and ordinary greenhouse（CK）on snowy days,continuous cloudy days and sunny days in winter,it is found that,The average daily air temperature and soil temperature in G1 solar greenhouse were 22.7℃and 24.0℃,respectively,which were 6.32%and 8.65%higher than G2,21.75%and 20.00%higher than CK,respectively.The daily average relative humidity of G1 was the lowest,followed by G2 and CK.2.In order to determine the production and use effect of greenhouses with different rear wall structures,The results showed that dry weight per plant,fresh weight per plant,plant width,chlorophyll a content,Vc content and per acre yield of lettuce produced in G1 greenhouse were 3.73 g,85.56 g,21.32 cm,1.62mg·g-1,162.11 mg·100g-1and684.48 kg,respectively,which were significantly higher than those of G2 and CK.Compared with CK,it increased by 47.08%,26.40%,26.82%,23.19%,8.68%and27.86%respectively.To sum up,the performance of water modular back wall greenhouse is significantly better than other greenhouse back walls,which is suitable for popularization and use in Handan area. |
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