Figure 1.
Relationship between soil organic C decomposition rates in organic material treatment and in control.
Each point represents a single comparison between the external organic C addition and control treatment. Values falling on the 1:1 line indicate a similar decay response for organic C addition vs control treatments, whereas points above or below the line indicate a stimulation or inhibition in decomposition, respectively.
Figure 2.
Response of soil organic C decomposition to external organic C addition when the data were grouped by (b) soil organic C content, (c) soil total N content, (d) the C:N ratio in soil and (e) soil texture.
The number of effect-size comparisons for each response variable is shown in parentheses.
Table 1.
Effect of organic material additions on between-group heterogeneity (Qb) for soil organic C decomposition rate.
Figure 3.
Response of soil organic C decomposition to external organic C addition when the data were grouped by (a) incubation stage, (b) organic material addition rate (expressed as % of soil C) (c) incubation temperature, (d) organic C quality.
The number of effect-size comparisons for each response variable is shown in parentheses.