The safety of vegetable production is a key link in reducing cadmium consumption through the food chains.Field experiments were conducted to investigate the effects of composite materials(calcium silicate-biological humus fertilizer) on the growth of shallots and the uptake of Cd by shallots from contaminated agricultural soil.Four treatments(T1: 0.5% calcium silicate + 0.5%biological humus fertilizer; T2: 0.5% calcium silicate + 1.0% biological humus fertilizer; T3: 1.0% calcium silicate + 0.5%biological h...