At the same irrigation level, the
salinity build-up in biochar amended pots was slightly higher than
in non-biochar amended pots, i.e. at 0 mM, 25 mM and 50 mM NaCl
irrigation, the averaged electrical conductivity (EC) levels were 2.3,
7.2 and 10.9 dS m−1 in the non-biochar treated soil and 2.8, 8.1 and
11.8 dS m−1 in the biochar amended soil, respectively. The ECs of
soil and soil–biochar mixture were measured using conductivity
meter in a 1:1 (soil: deionized water) soil saturated paste. The slight
difference in ECs between amended and un-amended biochar treatment
could have been due to higher concentration of nutrients in
biochar as shown in Table 1.