| 摘要 |
PROBLEM TO BE SOLVED: To uniformly and stably harvest crops having high sugar contents in good work efficiency at a low cost and in a good yield. SOLUTION: This method for culturing the crops, comprising (1) intercepting a culture medium not having fertility from rain water and the ground, (2) germinating or transplanting the crops, (3) stopping the supply of water and nitrogen fertilizers after the crops are germinated or transplanted, (4) giving water and fertilizers in small amounts comprising 1/10 to 1/100 of conventional amounts (clean culture method), when the crops start to be wilted, and (5) repeating the works of the processes (3) and (4) to produce the starved roots having a strong water-absorbing force and a strong fertilizer-absorbing force, thus harvesting crops having high sugar contents, characterized by receiving the culture medium not having fertility in a culture container for limiting the depth of the root rhizosphere of each of the crops to <= about 10 cm. The culture container for receiving the culture medium not having fertility is preferably a bag not permitting the permeation of the roots, gas and water and having a height of <= about 10 cm, and has a transplantation hole on the upper side, gas-permeable holes in the upper portion of the lateral side, and a draining hole in the lower end portion of the lateral side.
|
