有机中性化技术对重金属污染土壤锌有效性的长期影响

The Long-term Effects of Organo-neutralization on the Availability of Zinc in Heavy Metal-contaminated Soil

通过田间定位试验,研究了石灰(L)、钙镁磷肥(G)、泥炭(P)、猪粪(M)、石灰+泥炭(L+P)、石灰+猪粪(L+M)、钙镁磷肥+泥炭(G+P)、钙镁磷肥+猪粪(G+M)等改良材料对新罗区特钢厂附近的重金属污染田的长期改良效应。结果表明:大部分处理可提高土壤的pH值、有机质含量,降低了土壤的有效锌含量,石灰+泥炭、钙镁磷肥+泥炭的改良效果要优于单施有机、中性化改良剂和其它处理,和对照相比,有效锌含量和糙米锌含量最高分别降低了59.2%、36.2%。

A long-term field experiment at heavy-metal contaminated field in the suburb of Xinluo County, Fujian Province was conducted. Lime, calcium magnesium phosphate, manure and peat were applied into the soils both separately or assembly as remediation materials. Nine treatments, control （CK）, lime （L）, calcium magnesium phosphate （G）, peat （P）, hog manure （M）, lime with peat （LP）, lime with hog manure （LM）, calcium magnesium phosphate with peat （GP） and calcium magnesium phosphate with hog manure （GM）, are included in this experiment. The results indicated that the most treatments could increase the soil pH,organic matter,decrease the content of soil available Zn and the concentration of Zn in rice grains. The treatments of LP and GP showed better effects in lowering available Zn and the concentration of Zn in rice grains than the others, compared with the comparison,superlatively reduced 59.2%、36.2% separately.