不同改良剂对铁尾矿pH值和有机质含量的影响

Effect of different amendments on pH value and organic matter content of iron tailings

为使铁尾矿的pH值和有机质含量两项指标满足植物生长的条件，现采用生物炭、有机肥、稻壳、客土4种改良剂对尾矿基质进行改良．其中生物炭、有机肥、稻壳的添加比例均为铁尾矿的0，1％，3％，5％，10％；客土添加比例为0，10％，30％，50％，80％、得到的结论是，对于尾矿基质pH值的影响，客土改良效果最明显，添加比例达到30％以上时可将尾矿基质的pH值降至6-8，使其适宜植物生长；对于尾矿基质中有机质含量的影响，生物炭的改良效果最明显，但因为其碱性较强，所以需同时搭配有机肥、客土或者稻壳对铁尾矿进行改良，才能达到更好的效果，复合比例还需进一步探究。

In order to make the two indicators of pH value and organic matter content of the iron tailings meet the plant growth conditions, four amendments of biochar, organic fertilizer, rice husk, foreign soil were used to improve the tailings matrix, The addition ratio of biochar, organic fertilizer, rice husk are 0, 1%, 3%, 5%, 10% of iron taiqings ; foreign soil add a ratio of 0,10%, 30%, 50%, 80% .The conclusion is that for the effect of pH on tailings matrix, the most obvious effect of new soil, when the addition ratio reaches 30% or more,the tailings matrix pH reduce to the range of 6 to 8, which is suitable for plant growth; fororganic matter content oftailings matrix, the effect of biochar is most obvious, because of its strong alkaline, the need to mix organic fertilizer, rice husk or foreign soil need to be added to iron tailings at the same time to achieve better effect, and the composite ratio needs to be further explored.