The invention relates to a method for repairing
chromium-contaminated soil by using bacterial residue and
sorghum bicolor, and can effectively solve the problems of improving
soil fertility, increasing the growth amount of the
sorghum bicolor and improving the repairing efficiency of the
sorghum bicolor to the
chromium-contaminated soil. The method comprises the following steps: performing autoclaved sterilization on waste bacterial rods after
mushroom cultivation,
drying in air, crushing, uniformly spreading on the
surface layer of the
chromium-contaminated soil, plowing the soil, raking, planting the
sorghum bicolor with
sowing row spacing of 40-50 cm,
sowing amount of 2.5-3.5 kg / mu, and
sowing depth of 4 ~ 5 cm, covering the soil in time, watering regularly in the process of
plant growth, managing according to the
normal growth requirements of the
sorghum bicolor, and collecting soil and
plant samples for determination after 30 days of growth of the
sorghum bicolor. The method can effectively improve the
soil fertility, increase the growth of the sorghum bicolor, and improve the remediation of the chromium-contaminated soil by the sorghum bicolor, the bacterial residue can improve the soil, improve the
soil fertility, increase the growth of plants, improve the remediation efficiency of the plants on the chromium-contaminated soil, and the method is
pollution-free,
pollution-free and environment-friendly.