This paper carried out a systematic pilot study on the process of the thermal activation of available silicon from coal gangue,and the influence of temperature was examined.

The content and distribution of available silicon, grain size,clay minerals in the soil,pH of soil solution,and silicon solubility in the weathering process were studied by means of XRD,grain-size analysis and simulating experiment on soil weathering.

Pot experiments were conducted to study the effects of applying three kinds of blast furnace slag, a by-product from ironworks, as silicon fertilizer, on soil pH, content of available silicon in paddy soil, and silicon content in rice plant, with an acidic paddy soil in northern region of China.

Experiment research on available silicone extracted from coal refuse;

Determination on available silicone for silicone fortilizer by oxalic acid-sulfuric acid silicone-molybdenum blue spectrophotometric method, overcome the inadequate of others method.

Spatial variability of soil available Silicon in the sugarcane field of red soil area;