For SIC, the rate was 1.34 at 0-1 m depth to 5.33 g C m -2 yr -1 at 3-6 m depth, with an increasing trend with depth ( Figure 5 ).
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Storage/Turnover rate of inorganic carbon and its dissolvable part in the profile of saline/alkaline soils.
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pH values at depths of 3.0-6.0 m in alkaline soil showed a trend similar to the saline soil ( Figure 1 ).
The long-term carbon accumulation rate for SDIC ranges from 29.54 at 0-1 m depth to 7.58 g C m -2 yr -1 at 3-6 m depth, with a decreasing trend with depth.