漫反射薄膜覆盖大棚效果初报

应用漫反射聚氯乙烯薄膜在春夏覆盖大棚,一般比普通聚氯乙烯薄膜大棚内的一天中的最低温度高2.43℃,最高温度低2.34℃,从而使棚内蔬菜受冷、热害的程度减轻,尤其是能使一天中适宜于蔬菜生长发育的温度持续的时间相对显著延长,在漫反射薄膜棚内栽培的蔬菜表现长势好,光合作用强,氮代谢旺,结球甘蓝和生菜可增产15%左右,黄瓜和番茄的早期产量增产幅度较大,在20%以上,总产量可增产10%左右。

THE PRELIMINARY STUDY OF THE EFFECT OF USING DIFFUSE REFLECTION PLASTIC FILM ON THE HUGE SHED

By using diffuse reflection PVC film on the huge shed in spring and summer,the lowest temperature in a day is often 2.43℃ higher than that of the ordinary PVC film,and the highest temperature in a day is often 2.34℃ lower than that of ordinary PVC film,so that the vegetable hot and cold damages in the shed can be decreased,and the suitable period for the vegetable to grow in a day is relatively remarkable prolonged.Vegetable in the diffuse re- flection film shed grow better,the photosynthesises is strong,and the nitrogen metabolism is vigorous.The produc- tions of Brassica deracea vat.capitata L.and Lactuca sativa L.var angustana Irich can increase by 15% The cucum- ber and tomato's earlier productions increased by 20%,and the average total prcductions increase by 10%.