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美国1699年用水培法种菜。百年前,德国人采用现代标准剂型进行试验,取得成功。现在,美国的亚利桑那州的水培菜园已成为世界上最大的水培园地,可供全年蔬菜快速栽培。水培面积为10英亩(60.7市亩),由40个温室组成,每个面积26×128英尺(7.9×39米),每年生产蔬菜100万磅(90.7万斤)。目前,正在继续建筑新温室。1972年全美国有30个这种类型的水培菜园和养草所。并计划增加到200个,遍及50个州。
US 1699 hydroponics cultivation of vegetables. Hundreds of years ago, the Germans tested with modern standard dosage forms and achieved success. Now, the hydroponic vegetable garden in Arizona, the United States, has become the largest hydroponics park in the world and can be used for rapid cultivation of vegetables throughout the year. The hydroponic area is 10 acres (60.7 acres) and consists of 40 greenhouses each measuring 26 x 128 feet (7.9 x 39 meters) and producing 1 million pounds (907,000 kg) of vegetables a year. Currently, the construction of new greenhouses is continuing. In 1972, there were 30 such hydroponics gardens and grass-raising centers in the United States. And plans to increase to 200 across 50 states.