Water-retaining support for plants and plant body-growing water-retaining material

A plant body-growing water-retaining material comprising a mixture of a polymer (A) and a plant body-growing support (B), the 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 10 to 1000.

A water-retaining support for plants comprising a polymer (A) comprising at least 3-17 mmol of a carboxyl group bonded to the polymer chain thereof per 1 g of the dry weight thereof, wherein the content of alkali metal salt or ammonium salt of the carboxyl group is 0.3 to 7 mmol per 1 g of the dry weight of the support, the 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 1.0×101 to 1.0×103.

A water-retaining support for plants comprising a 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 1.0×101 to 1.0×103, wherein the counter ion to the chlorine ion is Na, K, Ca and/or NH4 ion.

A plant body-growing water-retaining material comprising a mixture of a polymer (A) and a plant body-growing support (B), the 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, having a water absorption magnification in ion-exchange water at 25° C. of 10 to 1000, and having a carboxyl group bonded to the polymer chain thereof, wherein the content of alkali metal salt or ammonium salt of the carboxyl group is 0.3 to 7 mmol per 1 g of the dry weight thereof.

A plant body-growing water-retaining material comprising a mixture of a polymer (A) and a plant body-growing support (B), the polymer (A) being a polymer comprising at least 3-17 mmol of a carboxyl group bonded to the polymer chain thereof per 1 g of the dry weight thereof, 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 10 to 1000.

A plant body-growing water-retaining material comprising a mixture of a polymer (A) and a plant body-growing support (B) comprising a rubber and/or a synthetic resin, the 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 10 to 1000.

A plant body-growing water-retaining material comprising a mixture of a polymer (A), a plant body-growing support (B) and a binder (C), the 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 10 to 1000.

A water-retaining support for plants comprising a polyvalent metal salt of a carboxyl group and a polyacrylic acid-type 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 1.0×101 to 1.0×103.