腐植酸钠对镉胁迫小麦幼苗生物效应的研究

Biological effect of sodium humate on the Cd-stressed wheat seedlings.

盆栽试验研究Cd胁迫下不同腐植酸钠处理(浸种、灌施、混施)对小麦幼苗生长及对污染元素(Cd)、营养元素(Cu、Zn、Fe、Mn)吸收和累积的影响结果表明,不同腐植酸钠处理可缓解重金属Cd元素的毒害作用,促进小麦幼苗干物质积累,且轻度污染土壤中可显著抑制小麦幼苗对Cd元素的吸收,并促进小麦幼苗对Cu、Zn、Fe、Mn营养元素的吸收和积累,随Cd污染程度加重,不同腐植酸钠处理抑制Cd吸收能力减弱并对Cu、Zn、Fe和Mn营养元素吸收产生不同影响。

Under the Cd stress conditions, the wheat seedling devel opment and the effects on assimilation and accumulation of contamination element Cd and nutriti on elements Cu, Zn, Fe and Mn in pot experiment under different sodium hu mate tr eatments such as seed soaking, irrigating and mixed manuring were studied. T he r esults indicate that different treatments of sodium humate can mitigate t he harmful effect of heavy metal Cd and improve the accumulation of d ry matt ers in whea t seedlings. In light polluted soil, it can remarkably inhibit the ass imilation o f Cd and increase the assimilation and accumulation of Cu, Zn, Fe and Mn . With the aggravation of Cd pollution, sodium humate's ability of inhibitin g the assimilation of Cd weekens, and may have different effects on the assimilation of nutr ition e lements Cu, Zn, Fe and Mn. So the better effects of averseness resistance a re shown.