The concentration of Ca2-P, Ca8-P and Al-P in the M treatment was significantly lower than in the B treatment 130 DAS in 2009. In 2010, Fe-P concentration in the M treatment was significantly higher than in the B treatment at 130 DAS, but the O-P concentration
was significantly lower. At sowing (0 DAS) in 2010, Ca10-P concentration in the M treatment was significantly lower than in the B treatment. The inorganic P fractions did not significantly differ between treatments at other growth stages (Table 4).