Development of plant production system using sea water

我们建立了一种新的简单的咸水植物栽培系统。该系统由一个装满盐水的扁平塑料容器和一个底部有孔的塑料锅组成。塑料锅的底孔用尼龙网盖住了。石头和玻璃棉被放置在锅的底部，其余的锅里装满了蛭石。锅被放在塑料容器的顶部。在白天，水吸收太阳能并蒸发。然而，由于罐内温度较高，蚯蚓石不会保留水分。在夜间，锅的温度降到浴缸的温度以下，因此蒸发的水被培养锅中的蛭石截留为纯净水。这个系统完全依赖太阳能。后者是免费的，不受限制，不需要复杂或昂贵的设备或设施。我们调查了几种培养条件，主要目标是增加水分供应和利用蛭石保持水分。在浴缸和盆栽上都用乙烯基薄膜覆盖，增加了浴缸的水分蒸发量和蛭石的保水能力。增加盆底面积和蚯蚓石的用量，有利于减少水蒸气和水分的补给，并使其保持净蓄水量。以咸水为唯一水源，在该系统中种植了油菜和金根菜。

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.