发明名称 |
Bottom soils and filtering media for rearing fresh-water fish or hydroponically cultivating plants and water tanks using such bottom soils and filtering media |
摘要 |
It has been known that water having a pH value of 5.5 to 7.5 is suited for the rearing of fresh-water fish and hydroponic cultivation of plants. Bottom soils or filtering media prepared by mixing carbonates of alkali metals or alkali-earth metals with volcano-ash-base soils and sintering the mixture into granules. When used in water tanks or reservoirs for fish rearing or hydroponic cultivation, the bottom soils or filtering media thus prepared provide favorable environments for such rearing and cultivation.
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申请公布号 |
US6112459(A) |
申请公布日期 |
2000.09.05 |
申请号 |
US19980085789 |
申请日期 |
1998.05.28 |
申请人 |
HIROSE CO., LTD. |
发明人 |
HIROSE, MITSURU |
分类号 |
C09K3/00;C05D3/02;C09K17/04;C09K101/00;C09K109/00;(IPC1-7):A01G31/00;C05F11/00 |
主分类号 |
C09K3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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