The invention provides a preparation method of
eucalyptus man-made forest waste
biochar, which comprises the following steps: collecting
eucalyptus man-made forest waste, removing soil and impurities on the surface of the
eucalyptus man-made forest waste, cleaning with water, naturally airing for 8 hours,
drying at 60-80 DEG C until the
water content is 15%, and crushing to obtain crushed eucalyptus man-made forest waste; and heating to 300-700 DEG C at a heating rate of 20 DEG C / min in the presence of
nitrogen or
argon, carrying out constant-temperature
carbonization for 2-4 hours, cooling to
room temperature, crushing, and screening with a 100-mesh
sieve to obtain the eucalyptus artificial forest waste
biochar. The eucalyptus man-made forest waste
biochar prepared by the invention can be used as a
soil conditioner for practical application, can effectively relieve
soil acidification of the eucalyptus man-made forest, improve
soil fertility and reduce the risk of heavy
metal cadmium, lead and
arsenic pollution of the soil, has a good removal effect on pesticides
paraquat,
glyphosate and
thiophanate methyl, and has a good application prospect. The yield and the quality of the pakchoi in the heavy
metal contaminated soil are improved, and good application prospects are achieved.