Development of plant production system using sea water

我们建立了一种新的简单的盐水栽培系统。该系统由一个装有盐水的扁平塑料容器和一个底部有洞的塑料罐组成。塑料罐的底孔上盖着一张尼龙网。石头和玻璃棉被放置在底部，罐子的其余部分装满了蛭石。花盆被放在塑料容器的顶部。在白天，水吸收太阳能并蒸发。然而，由于高温，蛭石没有保留水分。在夜间，培养皿的温度下降到低于浴缸的温度，蒸发的水被蛭石截留在培养皿中作为纯水。该系统完全依靠太阳能。后者是免费的，无限制的，不需要复杂或昂贵的设备或设施。我们研究了几种培养条件，主要目的是增加蛭石的供水和保水。在浴缸和花盆上覆盖乙烯基薄膜增加了浴缸的水分蒸发和蛭石的水潴留。增加罐底面积和蛭石的用量，促进了蛭石对水蒸气的捕获和水的供应以及净保留。该系统以咸水为唯一水源，栽培了油菜和青菜。

We established a novel simple system for plant cultivation using salt water. The system comprised of a flat plastic container, filled with salt water, and a plastic pot with a hole in the bottom. The bottom hole in the plastic pot was covered with a nylon net. Stones and glasswool were placed as a bottom layr and the rest of the pot was filled with vermiculite. The pot was placed on top of the plastic container.During the daytime, water absorbs solar energy and evaporates. However, because of high pot temperature, no water is retained by vermiculite. During the night, temperature of the pot drops below that of the bath and accordingly evaporating water is trapped as pure water by vermiculite in the culture pot. This system depends completely on solar energy. The latter is free, limitless and dose not require sophisticated or costly equipment or facilities.We investigated several cultural conditions with the prime objective of increasing water supply and retention by the vermiculite. Mulching with vinyl sheets on both the bath and the pot increased water evaporation from the bath and water retention by vermiculite. Increasing the bottom area of the pot as well as amount of vermiculite promotes capturing of water vapor and water supply and net retention by vermiculite.Rapessed and Chingensai plants were grown in this system using salt water as only water source.