The invention discloses a
soil column leaching device, which comprises a device body; the upper part of the device body is a leaching area, the lower part of the device body is a filtrate
filtration area; the top of the device body is provided with an externally-connected type water
distributor, the leaching area is communicated with a filtrate collecting area through a
sieve and a porous plate; the leaching area is, from top to bottom, sequentially divided into a buffer layer, a surface soil layer, a
subsoil layer, a fine
quartz sand layer and a coarse
quartz sand layer, and adjacent
layers are respectively separated by at least one
layers of
sieve; the surface soil layer and the
subsoil layer are respectively provided with a plurality of sampling ports; the filtrate collecting area includes a filter layer at the upper end and a filtrate collector at the bottom end, a downward-extending part of the top part of the filtrate collecting area is used as a support frame, the filter layer is positioned below the porous plate, the filtrate collector is located just below the filter layer, the filter layer is communicated with the device body through the porous plate and the
sieve. The beneficial effects of the
soil column leaching device are that: soil
stratified sampling can be performed without segmentation of the device; by arrangement of the externally-connected type water
distributor and the filtrate collecting area, water distribution is uniform, and
solid-liquid separation can be achieved, and the
soil column leaching device is convenient for experiment analysis.