Impacts of Biochar on Physical Properties and Erosion Potential of a Mudstone Slopeland Soil

Table 4

Soil organic carbon contents and microbial biomass carbon of the studied soils after 168 d incubation.

Treatments	Application rate	Organic carbon contents^∗	Microbial biomass carbon
		g kg^−1	mg kg^−1
Control	0%	0.68 ± 0.05^a	31.3 ± 1.18^a
RHB-400	2.5%	1.51 ± 0.08^b	33.7 ± 2.08^a
	5.0%	2.08 ± 0.03^c	53.8 ± 25.2^ab
	10%	3.71 ± 0.10^d	129 ± 26.3^c

Organic carbon contents were determined by differences between contents of total carbon and carbon derived from CaCO₃. Different letters beside the values mean significant difference (P < 0.05) at the same column.