Multi-element silicon fertilizer as well as preparation method and application thereof

The invention relates to multi-element silicon fertilizer as well as a preparation method and an application thereof. The multi-element silicon fertilizer is prepared from siliceous base fertilizer, alginic acid, active fermentation fertilizer, modified shell powder, compound amino acid, humic acid, metal composition, animal bone meal, sodium selenite, starch, chitosan, EDDHA-chelated iron and potassium fulvate. The multi-element silicon fertilizer has excellent effects of being good in permeability and water-retaining property, improving soil pH value and increasing crop yield through specific component selection and specific preparation methods of certain components, thereby having good application prospect and potential in the technical field of agriculture; besides, the multi-element silicon fertilizer can be in a liquid form or a solid form according to different needs and is preferably in the liquid state.