镉胁迫下富铁有机肥对芒草生长及镉富集的影响

为了探究镉胁迫下富铁有机肥对芒草生长及镉富集的影响,通过盆栽试验,设置CK（不施肥）、ZCK（施加普通有机肥）和Z2、Z3（施加不同浓度富铁有机肥）处理。结果表明：与CK相比,所有施肥处理均促进了芒草生长,改善了土壤理化性质,抑制了芒草富集重金属,且其中Z2、Z3比ZCK对芒草生长的效果更好。相对于ZCK,Z3的芒草干质量显著增加了131.80%,Z2的芒草根长显著增加了54.22%。此外,Z2地上部的镉含量相比于ZCK显著降低了49.86%,Z3地下部的镉含量相比于CK显著降低了58.94%。研究表明,施加富铁有机肥相对于普通有机肥更能有效促进芒草生长并抑制芒草对镉的富集,该肥料具有对轻度镉污染土壤进行边修复边生产的应用潜力。

Effects of iron-rich organic fertilizer on the growth and cadmium accumulation of Miscanthus sinensis Anderss under cadmium stress

This study aimed to investigate the effects of iron-rich organic fertilizer on the growth and cadmium accumulation of Miscanthus sinensis Anderss under cadmium stress. Pot experiments were conducted to set up CK（no fertilization）, ZCK（regular organic fertilizer）, and Z2 and Z3（application of different concentrations of iron-rich organic fertilizer）treatments. The results showed that, compared with CK, the application of the organic fertilizer treatment promoted the growth of Miscanthus sinensis, improved the soil physicochemical properties, and inhibited the absorption of heavy metals by Miscanthus sinensis. At the same time, Z2 and Z3 had a better effect on Miscanthus sinensis growth than ZCK. Compared to ZCK, the dry weight of Z3 significantly increased by 131.80%, and the root length of Z2 significantly increased by 54.22%. In addition, the cadmium content in the aboveground portion of Z2 significantly decreased by 49.86%, and the underground portion of Z3 significantly decreased by 58.94% compared to ZCK. In summary, applying iron-rich organic fertilizer is more effective in promoting the growth of Miscanthus sinensis and inhibiting its absorption of cadmium compared to regular organic fertilizer. This fertilizer has the potential to be used for both the remediation and production of lightly cadmium-contaminated soil.