在美国俄亥俄州立大学环境研究所,“高密度厂房农业”的开发正在热潮。在靠近沙漠的中间设置了半圆锥体型的塑料屋顶温室。进行着种种新奇的试验。其中之一:把泡沫塑料板竖着靠立起来,在它的表面栽满莴苣。从里面把雾状肥料溶液喷在根上。因为是立体利用空间,所以得到的是平面栽培面积的几倍。这就是立体农业的意义。其中之二:把莴苣栽植在泡沫塑料板上,下设水槽成双排列,在水槽中饲养鲶鱼,用莴苣 At the Ohio State University Environmental Institute, the development of “high-density plant agriculture” is on the upswing. In the middle of the desert, there is a semi-conical plastic roof greenhouse. A variety of novel experiments. One of them: the foam board standing upright, planted in its surface lettuce. Spray the misty fertilizer solution on the roots from the inside. Because it is three-dimensional use of space, so get a few times the area of ​​flat cultivation. This is the meaning of three-dimensional agriculture. Two of them: planted lettuce on a foam board, placed under a double arrangement of sinks, feeding catfish in the sink, lettuce