Water-holding carriers for plants and water-holding...

A - Human Necessities – 01 – G

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A01G 1/00 (2006.01) A01G 9/12 (2006.01) A01G 31/00 (2006.01)

Patent

CA 2350023

A water-retaining support for plants comprising a hydrogel-forming polymer (A) having a calcium ion absorption of 0-100 mg per 1 g of the dry weight thereof, having a chlorine ion content of 0.07-7 mmol per 1 g of the dry weight thereof and having a water absorption magnification in ion-exchange water at 25°C of 1.0 x 10 1 to 1.0 x 10 3; or a plant body-growing water-retaining material comprising a molded product of a mixture of such a polymer (A) and a plant body-growing support (B). The water-retaining support for plants and the plant body- growing water-retaining material are those which have an excellent water-retaining property and they substantially do not cause inhibition of root generation or inhibition of root elongation.

La présente invention concerne des matériaux à rétention d'eau pour plants renfermant un polymère (A) formant un hydrogel qui est capable d'absorber de 0 à 100 mg d'ion calcium par gramme de matière sèche, renferme de 0,07 mol à 7 mols d'ions chlorés par gramme de matière sèche et a un rapport d'absorption d'eau compris entre 1,0 x 10<1> et 1,0 x 10<3> dans de l'eau déionisée à 25 DEG C. L'invention concerne également des éléments porteurs à rétention d'eau comprenant un article moulé à partir du polymère (A) susmentionné avec un support pour cultures végétales. Ces éléments porteurs et matériaux à rétention d'eau se caractérisent par une remarquable aptitude à retenir l'eau sans empêcher, pour l'essentiel, la pousse des racines ou leur allongement.

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