초록 ▼

A vitreous product which can be used in agriculture is disclosed. With the exception of nitrogen, this vitreous product contains all the major and minor mineral elements which are essential for the nutrition of plants. The vitreous products can contain the following constituents, taken in the follow

A vitreous product which can be used in agriculture is disclosed. With the exception of nitrogen, this vitreous product contains all the major and minor mineral elements which are essential for the nutrition of plants. The vitreous products can contain the following constituents, taken in the following proportions by weight: [TABLE] ______________________________________ SiO 2 25 to 65% Fe 2 O 3 1 to 15% P 2 O 5 1 to 15% B 2 O 3 0.01 to 2% K 2 O 5 to 35% MnO 0.01 to 3% CaO 11 to 35% ZnO 0.01 to 3% MgO 1 to 10% CuO 0.01 to 2% SO 3 0.01 to 1% MoO 3 0.01 to 3% Na 2 O 0 to 2% Al 2 O 3 0 to 25%. ______________________________________

대표청구항 ▼

1. Silicon dioxide-based glass fibers for use in agriculture, comprising at least 25% by weight of silicon dioxide, and, with the exception of nitrogen, all the major and minor nutritive essential elements for the nutrition of plants, said major nutritive essential elements comprising P 2 O 5, K 2 O

1. Silicon dioxide-based glass fibers for use in agriculture, comprising at least 25% by weight of silicon dioxide, and, with the exception of nitrogen, all the major and minor nutritive essential elements for the nutrition of plants, said major nutritive essential elements comprising P 2 O 5, K 2 O, CaO, MgO, and SO 3 ; said minor nutritive essential elements comprising Fe 2 O 3, B 2 O 3, MnO, ZnO, CuO and MoO 3 ; said elements being capable of being removed by a plant's root system from an ambient medium, wherein the quantity and proportion of the said major and minor nutritive elements in said glass fibers are selected such that said nutritive elements are soluble and can be assimilated by the plant. 2. The silicon dioxide-based glass fibers of claim 1, comprising: SiO 2 in 25 to 65 wt. %; P 2 O 5 in 1 to 15 wt. %; K 2 O in 5 to 35 wt. %; CaO in 11 to 35 wt. %; MgO in 1 to 10 wt. %; SO 3 in 0.01 to 1 wt. %; Fe 2 O 3 in 1 to 15 wt. %; B 2 O 3 in 0.01 to 2 wt. %; MnO in 0.01 to 3 wt. %; ZnO in 0.01 to 3 wt. %; CuO in 0.01 to 2 wt. %; MoO 3 in 0.01 to 3 wt. %; Na 2 O in 0 to 2 wt. %; and Al 2 O 3 in 0 to 25 wt. %. 3. The silicon dioxide-based glass fibers of claim 1, comprising Al 2 O 3 in an amount of less than 7% by weight. 4. The silicon dioxide-based glass fibers of claim 1, comprising: SiO 2 in 40 to 55 wt. %; P 2 O 5 in 5 to 8 wt. %; K 2 O in 15 to 20 wt. %; CaO in 13 to 18 wt. %; MgO in 4 to 7 wt. %; SO 3 in 0.1 to 0.3 wt. %; Fe 3 O 3 in 2 to 5 wt. %; B 2 O 3 in 0.1 to 0.3 wt. %; MnO in 0.1 to 0.3 wt. %; ZnO in 0.1 to 0.3 wt. %; CuO in 0.1 to 0.2 wt. %; MoO 3 in 0.05 to 0.1 wt. %; Na 2 O=0.1 to 0.5 wt. %; and Al 2 O 3 in <7 wt. %. 5. The silicon dioxide-based glass fibers of claim 1, wherein the glass fibers have specific surface area of 0.25 to 0.35 m 2 /g. 6. The silicon dioxide-based glass fibers of claim 5, wherein the glass fibers have an average diameter of between 3 and 9 micrometers. 7. The silicon dioxide-based glass fibers of claim 1, wherein the glass fibers are bound by an organic binder. 8. The silicon-dioxide based glass fibers of claim 7, wherein the organic binder is a phenoplast resin, an aminoplast resin, or a mixture of these. 9. The silicon dioxide-based glass fibers of claim 7, wherein the vitreous material comprises the binder on the order of from 2 to 15% by weight of the glass fibers. 10. The silicon-dioxide based glass fibers of claim 7, wherein the vitreous material comprises the binder on the order of 3 to 6% by weight of the glass fibers. 11. A substrate for culture outside the soil, comprising the silicon dioxide-based glass fibers of claim 1 and an agronomically inert material.