栽培条件对灵芝子实体中四种重金属含量的影响

以不同灵芝品种、不同栽培基质、不同栽培方式、不同生长时期获得的菌草灵芝和木屑灵芝为原料,对栽培基质及灵芝子实体中铅、砷、汞、镉4种重金属的含量参照国际标准进行检测,结果表明虽然菌草栽培基质中重金属含量高于木屑栽培基质,但菌草灵芝对重金属富集率远低于木屑灵芝,成熟期的菌草灵芝与木屑灵芝中的重金属含量均低于农业行业标准和国家标准。因此菌草可以替代木屑用作灵芝栽培的营养来源。

Effects of cultivation conditions on the content of four heavy metals in Ganoderma lingzhi fruiting bodies

The content of four heavy metals(lead,cadmium,mercury and arsenic)in culture substrate and different growth stages of fruiting bodies of different varieties of Ganoderma lingzhi cultivated in different substrates by use of different cultivation methods was tested.The results showed that the content of heavy metals in the fruiting bodies of G.lingzhi cultured in"juncao"and that cultured in sawdust not exceeded the provided national standards.Although the heavy metal content in"juncao"substrate was higher than that in sawdust substrate,the heavy metal enrichment rate of G.lingzhi cultured in"juncao"was much lower than that cultured in sawdust.Therefore,"juncao"is an ideal substrate for replacing sawdust for cultivation of G.lingzhi.