无土栽培就是用含有植物所需营养元素的水溶液在一些多孔性的非土基质上栽培植物的一种科学技术。1804和1834年,法人索彦尔和布森高分别在水培和砂培条件下进行过试验。近三、四十年来,美、英、荷、日、法、苏、德、印和科威特等阿拉伯国家都竞相发展无土栽培,种植蔬菜、水果、花卉、树苗、谷物和牧草。具有几千平方米规模,折合亩产番茄5—6万斤的“蔬菜工厂”已在美、日、英等一些国家相继出现。今天,无土栽培学已发展成为一门新兴的农业学科。目前,我国无土栽培尚处于试验研究阶段。1975年以来,上海、湖北和辽宁等省市先后进行了水稻无土育秧或蔬菜无土育亩。而农作物全生育期的无土栽培试验研究还很 Soilless cultivation is a science and technology that plants in some porous, non-soil substrates using an aqueous solution containing the nutrients needed by plants. In 1804 and 1834, the legal entities Sauhan and Boussougou were tested under hydroponic and sand culture conditions respectively. Nearly three or four decades ago, Arab countries such as the United States, Britain, the Netherlands, Japan, France, the Soviet Union, Germany, India and Kuwait all vied with each other for the development of soilless cultivation and the cultivation of vegetables, fruits, flowers, saplings, grains and grass. With a scale of several thousand square meters, equivalent to 5-6 kilos of mu produce per mu of vegetable factory has been in the United States, Japan, Britain and some other countries have appeared. Today, soilless culture has developed into a new agricultural discipline. At present, soilless culture is still in the stage of experimental research in our country. Since 1975, Shanghai, Hubei and Liaoning provinces and cities have conducted soilless rice seedling cultivation or vegetable soilless mu. Soilless cultivation of crops throughout the growth of experimental research is still