Contrasting effects of exogenous phosphorus application on N2O emissions from two tropical forest soils with contrasting phosphorus availability

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Table 3 Soil microbial biomas C, N, and their ratio to CO₂ and N₂O emissions

Soil	Treatment	MBC (μg C g soil⁻¹)		MBN (μg N g soil⁻¹)		MBC/CO₂ emissions		MBN/N₂O emissions
Soil	Treatment	Avr.	SE	Avr.	SE	Avr.	SE	Avr.	SE
Meta-sedimentary (MS)	Control	599.1	162.7	92.8	31.9	16.9	4.7	75.0	22.5
Meta-sedimentary (MS)	P-added	919.3	73.3	163.9	13.2	34.6*	3.6	174.5*	19.2
Ultrabasic (UB)	Control	825.5	130.6	121.7	31.5	26.4	6.0	206.2	123.0
Ultrabasic (UB)	P-added	1030.2	32.8	201.8	16.3	27.4	2.5	389.8	296.3

MBC soil microbial biomass C, MBN soil microbial biomass N, SE standard error
* P < 0.05