关键词: 镉, 菠菜, 凹凸棒, 缓解作用

Abstract: Taking pot cultivation method，this paper studied the effects of different additive proportion attapulgite on growth，antioxidant enzyme activity and cadmium enrichment of spinach under cadmium stress．The results showed that under moderate cadmium stress，the plant height，stem diameter，fresh
weight and dry weight of overground and underground parts of spinach all presented the changing tendency of increasing first then decreasing，but SOD activity，POD activity，and APX activity presented the changing tendency of decreasing first then increasing．While，the Cd²⁺ contents in aboveground and underground parts and enrichment coefficient of cadmium were gradually decreased，but there was no significant difference in the transport coefficient among each treatment．Among them，when additive amount of attapulgite in matrix was 15%，the Cd²⁺ contents in aboveground and underground parts of spinach plant were significantly reduced，the significantly reduced enrichment coefficient had alleviated the toxic effect of cadmium stress on spinach．Spinach plant height，stem diameter，fresh quality and dry quality of aboveground parts and fresh quality of underground part all reached the maximum value．

Key words: cadmium, spinach, attapulgite, alleviated effect