论文部分内容阅读
为探索生物炭与肥料配施降低烟叶对重金属镉的吸收和土壤中镉含量的可行性,采用盆栽试验,研究了镉胁迫下生物炭与不同肥料配施对生育期内烟叶生物量、烟草各部位镉含量、植烟土壤中镉含量和土壤p H的影响。结果表明:生物炭与肥料配施能够促进烟叶生物量的增加,烟叶生物量依次为有机肥+无机肥+生物炭>无机肥+生物炭>有机肥+无机肥>无机肥>未施肥;生物炭与不同肥料配施时烟叶各叶位镉含量较低,生育期内生物炭与有机肥+无机肥配施下烟叶镉含量较有机肥和无机肥配施降低了52.57%,根茎中降低的镉含量最高达59.69%;各处理土壤中的有效态镉含量均有不同程度降低,降幅顺序为有机肥+无机肥+生物炭>无机肥+生物炭>有机肥+无机肥>无机肥>未施肥。上述结果表明生物炭与有机肥和无机肥配施既能促进烟叶生长,也能降低土壤有效态镉的相对含量,减少烟叶中镉的吸收积累,进而降低烟叶中镉含量,适合在重金属污染烟田施用。
In order to explore the biochar and fertilizer combination to reduce the absorption of heavy metal cadmium in tobacco leaves and the feasibility of cadmium in soil, pot experiments were conducted to study the effects of biochar and different fertilizers on biomass, Cadmium content, cadmium content in tobacco planting soil and soil p H. The results showed that the combination of biochar and fertilizer could increase the biomass of tobacco leaves. The biomass of tobacco leaf followed by organic fertilizer, inorganic fertilizer, biochar, inorganic fertilizer, biochar, organic fertilizer, inorganic fertilizer, inorganic fertilizer, Compared with organic fertilizer and inorganic fertilizer, the content of cadmium in tobacco leaves decreased by 52.57% with the combination of biochar and organic manure + inorganic fertilizer during the growth period, and decreased in rhizomes The content of cadmium is up to 59.69%; the content of available Cd in soil is decreased to some extent, the decreasing order is organic fertilizer + inorganic fertilizer + biochar> inorganic fertilizer + biochar> organic fertilizer + inorganic fertilizer> inorganic fertilizer> Fertilization. The above results show that the combination of biochar with organic and inorganic fertilizers not only can promote the growth of tobacco leaves, but also reduce the relative content of available cadmium in soil, reduce the absorption and accumulation of cadmium in tobacco leaves, and then reduce the content of cadmium in tobacco leaves, Tian applied.