Effects of Modifiers on the Growth and Cadmium Accumulation of Celery in Cadmium Contaminated Soil

In order to select the modifiers that can effectively reduce the absorption cadmium of celery on cadmium pollution soil,pot experiment was performed to study the effects of pairs of nano hydroxyapatite(HA),artificial zeolite(Z),superphosphate(P)and lime(L)on the celery biomass,cadmium uptake,soil pH value.The results showed that application of 6 kinds of modifiers combination could significantly improve the growth of celery,and the biomass of celery was significantly higher than that of the pollution control.Compared with pollution control,application of nano hydroxyapatite(5 g/kg)+artificial zeolite(5 g/kg)and nano hydroxyapatite(5 g/kg)+calcium superphosphate(4 g/kg) significantly inhibit the absorption of the cadmium,resulted in the reduction of edible part cadmium content by 57.43% and 54.88%.Comprehensive consideration,nano hydroxyapatite(5 g/kg)+artificial zeolite(5 g/kg)and nano hydroxyapatite(5 g/kg)+calcium superphosphate(4 g/kg)combination could be widely used in cadmium pollution soil renovation