Factors Controlling Carbon Metabolism and Humification in Different Soil Agroecosystems

Table 2

Biochemical properties at T1 and T2 sampling times. For each site, different letters indicate statistically different values among the treatments ( < 0.05).

		EG	TG	DH-ase
		mg PNP kg^−1 h^−1	mg PNP kg^−1 h^−1	mg INTF kg^−1 h^−1
T1
Abanilla-Spain	S-C	3.3^b	117^a	1.08^b
	S-WOF	44.1^a	405^b	3.21^a
Alberese-Italy	I-CA	6.7^a	511^b	2.10^b
	I-BA	6.6^a	883^a	2.52^a
Puch-Germany	P-CA	16.1^b	95^b	4.67^a
	P-IT	4.4^c	82^c	1.38^c
	P-C	44.7^a	182^a	2.26^b
T2
Abanilla-Spain	S-C	3.6^b	75^b	1.78^b
	S-WOF	31.3^a	438^a	5.06^a
Alberese-Italy	I-CA	6.3^a	639^b	2.98^b
	I-BA	6.4^a	823^a	3.58^a
Puch-Germany	P-CA	15.8^b	145^b	4.31^a
	P-IT	4.3^c	50^c	1.22^c
	P-C	40.4^a	190^a	2.86^b

EG, extracellular -glucosidase activity; TG, total -glucosidase activity; DH-ase, dehydrogenase activity.
C, control; WOF, waste organic fraction addition; CA, conventional agriculture; BA, organic agriculture; IT, intensive tillage. T1, initial sampling time; T2, one year later.