What Are the Construction Uses of Rice Hulls?

Carbonized rice husks are charcoal substances formed by heating rice husks to a temperature below their ignition point and causing them to burn insufficiently. It has the characteristics of light weight and low thermal conductivity.

Carbonized rice husk

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Carbonized rice husk refers to

Can be used for industrial production of steel, iron, etc.

Overview of carbonized rice husks for substrates

The bulk density of carbonized rice husks in the nursery substrate is generally 0.15-0.24g / cubic centimeter, the total porosity is 82.5% (large 57.5%, small 25%), light weight, breathable, and moderate moisture absorption. Also pay attention to wet damage when the liquid supply is excessive. The carbonized rice husk contains 0.54% nitrogen, 66mg / kg of available phosphorus, 0.66% of available potassium, rich nutrition, high-temperature carbonization, and free of germs. The pH value is 6.5-7.7. If there is no water washing before use, the K2CO3 formed by carbonization will raise the pH value to more than 9, so it should be washed before use.

For many good potassium crops, carbonized rice husks or plant ash in the nursery substrate can increase potassium; make the soil loose, breathable, darker in color, absorb more solar heat, increase soil temperature, and the content of carbonized rice husks can be It accounts for 20% to 30% of the nursery substrate content. The degree of carbonization of the rice husk should be properly controlled. Generally, the rice husk should be completely carbonized, but the basic shape should still be basically maintained. If rice husks are lacking, waste cottonseed crumbs after planting edible fungi can also be used to compost and ferment with garden soil and manure.