| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hydroponic device with which optimum conditions on density, temperature and the like for culture liquid preliminarily adjusted and supplied can be maintained in a cultivation tank and the culture solution can be uniformly supplied, and nutrients, oxygen and environment are properly and stably given to cultivated crops. <P>SOLUTION: The hydroponic device includes at least a cultivation tank 10 and a cultivation bed 20, supplies the adjusted culture solution into the cultivation tank 10, makes the culture solution constantly circulate in a flow condition and enables adjustment of the water level of the culture solution. The device is structured as follows: a plurality of liquid supply openings 31 for supplying the culture solution into the cultivation tank 10 are disposed on the longitudinal one side of the cultivation tank 10 at intervals, and a plurality of drainage openings 41 for draining the culture liquid from the inside of the cultivation tank 10 are disposed on the longitudinal other side of the cultivation tank 10 at intervals so as to make the flow direction of the culture liquid flowing in the cultivation tank 10 correspond to a lateral direction; and the number of times of exchanging the culture solution in the cultivation tank 10 is adjusted to be within 1-10 times per 1 h. <P>COPYRIGHT: (C)2012,JPO&INPIT |
