JPWO2020129222A5 - - Google Patents

Claims (10)

A fertilizer containing a vitreous foamed calcined product having an elution property of metasilicate ions (SiO 3-2-) with respect to water ^and _having an average particle size in the range of 10 to 60 mm . A fertilizer containing a vitreous foam fired body.
The vitreous foamed fired body has an average particle size in the range of 10 to 60 mm, and metasilicate ions when 100 g of the vitreous foamed fired body is placed in 1 liter of water and stored for 3 days. (SiO ₃ ^2- ) Concentration is 25 mg / L or more, metasilicate ion (SiO) with respect to water ₃ ^2- ) Fertilizer showing elution. Metasilicate ion (SiO) when 100 g of the vitreous foam fired body was placed in 1 liter of water and stored for 14 days. ₃ ^2- ) The fertilizer according to claim 1 or 2, wherein the concentration is 50 mg / L or more. A method for producing a cultivated plant, which comprises arranging the fertilizer according to any one of claims 1 to 3 in the vicinity of the root of the cultivated plant in soil cultivation or hydroponic cultivation of the cultivated plant. .. The method for producing the fertilizer according to any one of claims 1 to 3.
SiO ₂ To the glass crushing raw material obtained by crushing a glass raw material containing 65.0% by mass or more of, 0.1 to 3% by mass of a foaming agent is added to 100% by mass of the glass crushing raw material, and the glass crushing raw material is added. And the step of mixing the foaming agent to prepare a mixed powder,
A firing foaming step of heating the mixed powder at a softening point or higher of the glass crushing raw material, and
A cooling step of obtaining a vitreous foamed fired body by cooling after the fired foaming step.
How to make fertilizer, including. The method for producing fertilizer according to claim 5, wherein a plurality of vitreous foamed fired bodies having a particle size of 10 to 60 mm are obtained by quenching the cooling in the cooling step. The method for producing fertilizer according to claim 5 or 6, wherein the glass raw material is soda-lime glass. The glass raw material is SiO ₂ 65.0 to 75.0% by mass, CaO 7.0 to 15.0% by mass, Na ₂ O is 10.0 to 16.0% by mass, K ₂ O is 0 to 3.5% by mass, MgO is 0 to 4.5% by mass, Al ₂ O ₃ The method for producing a fertilizer according to claim 5 or 6, wherein 0 to 2.5% by mass of C, 0 to 2% by mass of C, and less than 3% by mass of other components are used. The fertilizer according to any one of claims 1 to 3 is placed in the soil or on the surface of the ground in the case of soil cultivation of cultivated plants, and the cultivated plants in the case of hydroponics of cultivated plants. The concentration of ^metasilicate ion (SiO _3-2- ) in the vicinity of the root of the cultivated plant is measured by arranging it in the vicinity of the root of the plant or at least in contact with one of the water supply routes to the root of the cultivated plant. A method for promoting the growth of cultivated plants, which is characterized by adjusting. The method for promoting growth of a cultivated plant according to claim 9 , wherein the concentration of metasilicate ion (SiO ₃ ^2- ) in water given to the cultivated plant is maintained at 20 mg / L or more.