The Presence of the Biochar Interlayer Effectively Inhibits Soil Water Evaporation and Salt Migration to the Soil Surface

To reveal the mechanisms of water conservation and soil salinity control in biochar interlayer, effects addition as an interlayer on infiltration, evaporation, salt transport were studied. Through indoor soil-column simulation test, columns set up by packing homogeneous (CK) spacers into at different burial depths 10, 20, 30 cm. The decreased infiltration capacity soil, with average rate decreasing from 0.72 cm·h−1 to ranges 0.39–0.48 CK column, leaching efficiency was improved. content bottom layer column reduced within range 19.96–47.46% compared that barrier column. presence improved distribution salt. upper above around 7.79–13.68% higher than CK, whereas 6.44–60.40% lower CK. inhibited cumulative evaporation this 32.34–42.10% accumulation 16.36–51.36% could not only retain for a long time, but also adsorb leached layer, thus, inhibit reverse flux layer. creation cm play role conservation, can provide basis reference improvement saline-alkali farmland arid semi-arid areas.