3.3. Dynamics of available P, MBC, APA and ALP
Soil available P concentration in the M treatment was less than in the B treatment in all growth periods, except 100 DAS in 2009 and 40 DAS in 2010 (Fig. 1). The LSD bar in Fig. 2 shows the significance of soil available P differences between treatments. The MBC concentration in the M treatment was significantly higher (P≤0.05)than in the B treatment at 70 DAS in 2009 and at 70 and 100 DAS in 2010, but was significantly lower (P≤0.05) than the B treatment at 70 DAS in 2009 and 0 DAS in 2010. Moreover, MBC concentration was significantly less (P ≤ 0.05) in all treatments from the beginning
to the end of the experiment (Fig. 1).