| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an apparatus for hydroponics where a culture solution can be maintained in an optimum condition for growth of plants by suppressing the concentrations of toxic substances at such level as to be equal to or less than a concentration level of damaging the growth of plants without measuring the concentrations of the toxic substances. <P>SOLUTION: The apparatus for hydroponics 1 comprises the followings: a nutritious liquid tank 3 wherein a plant cultivation panel 2 floats on nutritious liquid W; a nutritious liquid circulation pathway 6 communicating with the nutritious tank 3; and a nutritious liquid supplying pathway 8 and a nutritious liquid extracting pathway 7 respectively communicating with the nutritious liquid tank 3 and/or the nutritious liquid circulation pathway 6. The method for hydroponics comprises the following process: using the apparatus for hydroponics 1; cultivating plants P planted in the plant cultivation panel 2 in the nutritious tank 3 while circulating the nutritious liquid W via the nutritious liquid circulation pathway 6; supplying a predetermined amount S of additional nutritious liquid W<SB>N</SB>through the nutritious liquid supplying pathway 8; and extracting a predetermined amount R of the nutritious liquid W through the nutritious liquid extracting pathway 7. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
