| 摘要 |
PCT No. PCT/SE81/00004 Sec. 371 Date Sep. 10, 1981 Sec. 102(e) Date Sep. 10, 1981 PCT Filed Jan. 12, 1981 PCT Pub. No. WO81/01940 PCT Pub. Date Jul. 23, 1981.A method of cultivating plants without soil, wherein a nutrient solution is supplied to the root system of the plants. Before the nutrient solution is supplied to the root system it is oxidized with substantially pure oxygen to maintain a content of dissolved oxygen at the root system which is at least 4 ppm. |
