Available P and inorganic P, Ca2-P had a significant (P≤0.05) positive correlation in both treatments in 2009, and in the M treatment in 2010 (Table 7). Available P had a significant (P≤0.05) positive correlation with Al-P, Fe-P and Ca10-P, and a negative correlation with O-P in the M treatment in 2009, but no significant correlation in the B treatment (Table 7). In 2010, available P and O-P had a significant (P≤0.05) negative correlation in both treatments, and available P and Ca2-P had a significant (P≤0.05) positive correlation in the M treatment. Other soil inorganic P fractions had no significant correlation with available P in either treatment in 2010 (Table 7).