Diazotrophic Bacterial Community of Degraded Pastures

Table 2

Population density of the cultivated diazotrophic bacterial community in different niches of plant/bacteria association in B. decumbens Stapf. pasture in different degradation stages.

Pasture degradation stage	Niche of plant/bacteria association		Mean
	Rhizospheric soil	Root-endophytic
	CFU/g ()
Highly degraded			6.31
Partially degraded			6.51
Slightly degraded			6.23
Mean	6.70	5.99
	test ()
Degradation stage
Niche of association
Stage × association
CV	7.34

of variation (CV) = 100 × standard deviation/average. Means followed by the same letter, uppercase in the row and lowercase in the column, do not differ statistically by the Scott-Knott test (). at 5 and 1% probability by test, respectively. significant.