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采用盆栽试验,研究含腐植酸风化煤对镉(Cd)污染土壤蔬菜系统,土壤理化性质以及小白菜生理指标的影响。结果显示,含腐植酸风化煤对Cd污染土壤中全氮含量影响不明显;但可以增加速效磷含量和根系阳离子交换量。活化的含腐植酸风化煤可以增加速效钾含量;更有利于增大SPAD值。因此含腐植酸风化煤能改善Cd污染土壤理化性质,促进植株健康生长,以活化含腐植酸风化煤为佳。
Pot experiments were carried out to study the effect of humic acid weathered coal on the Cd-contaminated soil and vegetable system, soil physical and chemical properties and the physiological indexes of Chinese cabbage. The results showed that humic acid-weathered coal had no obvious effect on the total nitrogen content in soils contaminated by cadmium, but could increase the content of available phosphorus and the exchange capacity of root cation. Activated anthracite weathered coal can increase the available potassium content; more conducive to increasing the SPAD value. Therefore, the weathering coal with humic acid can improve the physical and chemical properties of Cd-contaminated soils and promote the healthy growth of plants, so it is better to activate the weathered coal with humic acid.