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据报道,突尼斯很多大棚使用了太阳能加热方式,可以提高土壤温度1.5℃,棚内作物可提早收获一个月。法国的科西嘉岛也建立了三公顷利用太阳能加热的大棚,收到了很好的效果。塞浦路斯还集中了各国太阳能集热器的优点,建立了比较先进的用于塑料大棚的太阳能集热器。法国国家农业园艺研究所利用太阳能加热棚内的热水被的一套循环装置也是很成功的办法。热水被是用聚氯乙烯简称(PVC)的黑色薄膜,厚度0.5毫米。经热焙焊接制成袋状物。袋子有17厘米和35厘米两种规格,袋子的一端为入水口,另一端为出水口。这种热水被覆盖在土壤表面上(每垄作物用两条热水被覆盖),通过热传导使土壤升温,通过热辐射可以加热植物的叶和茎。既有加热又有保温的作用。
It is reported that many greenhouses in Tunisia use solar heating methods, which can increase soil temperature by 1.5 ℃ and shed crops for one month earlier. Corsica, France, also built three hectares of solar-powered greenhouses and received good results. Cyprus also focuses on the merits of solar collectors in various countries and has established a more advanced solar collector for use in plastic greenhouses. The French National Institute of Agricultural Horticulture is also a very successful method using a circulating device that uses hot water in a solar-powered greenhouse. Hot water is a thin film of polyvinyl chloride (PVC) black with a thickness of 0.5 mm. Heat-baked bag made of material. Bags are 17 cm and 35 cm two specifications, one end of the bag into the water, the other end of the outlet. This hot water is covered on the surface of the soil (two hot water per ridge of crop is covered), the soil is heated by heat conduction and the leaves and stems of plants are heated by thermal radiation. Both heating and insulation effect.