| 摘要 |
Self-contained plant growth systems include a three-compartment plant growth chamber having an upper compartment for holding soil or vermiculite, an intermediate reservoir compartment for storing fluid-such as a plant growth solution-and a lower compartment housing a pump and electric power source. Responsive to signals from a water sensor in the upper compartment, the pump is activated for pumping a metered quantity of growth solution along a feeder tube from the reservoir compartment to the upper compartment. Drainage is provided from the upper compartment to the reservoir. A vent tube vents air to and from the reservoir during emptying and filling operations. An on/off switch selectively de-activates the pump, and the chamber can include elements for displaying reservoir fluid level.
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