Method and equipment for dissolved oxygen enrichment of irrigation water for plant cultivation
AssigneeL'Air Liquide, Societe Anonyme pour l'Exploitation des Procedes Georges Claude
InventorsFranck COUSIN, Pauline LE DRU
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Abstract
A method and equipment for plant cultivation, where the plants are supplied with water, over irrigation phases of specific duration spread over a 24 h day, which water has a given content of dissolved oxygen, characterized in that use is made of a system for boosting the injection of oxygen (or of an oxygen-containing gas mixture) in the irrigation water over a first period, of given duration, of one or some of the irrigation phases in question, and in that the remainder of the time of said irrigation phase(s) in question is characterized by a content of dissolved oxygen in the water which is nominal, i.e. lower than the boosted content of the first period.
Claims9
A method for cultivating plants, wherein the plants are supplied with water during irrigation phases of determined duration, spread over a 24-hour day, which water has a given dissolved-oxygen content, comprising:
- boosting the injection of oxygen or of a gaseous mixture containing oxygen into an irrigation water during a first period, of given duration, of one or of some of the irrigation phases concerned, through the fact that the oxygen content in the irrigation water during said first period is greater than a given set-point,
- wherein
- the remainder of the time of said irrigation phase(s) concerned, the first period of which has been boosted, is characterized by a dissolved-oxygen content of the irrigation water which is equal to said set-point.
A plant cultivation equipment, wherein the plants are supplied with water during irrigation phases of determined duration, spread over a 24-hour day, which water contains a given dissolved-oxygen content, the plant cultivation equipment comprising:
- at least one irrigation water supply line, configured to supplying water to the crop;
- means of injecting oxygen or a gas containing oxygen into the irrigation water;
- wherein the installation comprises a flow rate sensor, located on the water supply line supplying water to the crop, and in that the means for injecting oxygen or a mixture containing oxygen comprise two supply lines for admitting oxygen or a mixture containing oxygen into the water supply line, each gas supply line being equipped with a flowmeter in series with an electrically operated valve, one of the two electrically operated valves being on a timer.
Dependencies are inferred from the claim text.