Fig.2 (a)), available P contents in Ab were kept no significant different to that of A from 0 to 5 days, and
20 to 110 days, and was higher from 5 to 20 days. As for the treatments B and Bb (in Fig.2 (b)), the trend
was same. The peak value of available P content in the treatments of A and Ab were slightly higher than
those of B and Bb, and all of them were significantly higher than that of CK.