Phosphorus Sorption and Redistribution on Soil Solid Phase in a Brazilian Haplorthox Amended with Biosolids

Table 4

Phosphorus fractions in a soil treated with increasing rates of biosolids.

Phosphorus rate	CaCl2	NaHCO3			NaOH			HCl	Residual	Total (sum)	Total
		Po	Pi	Pt	Po	Pi	Pt
kg ha^−1	mg kg^−1
0	5	11	36	47	6f	32	38	15	289	394	343
250	6	51	47	98	14	54	68	36	260	468	367
1000	8	41	80	121	32	103	135	33	322	618	507
2000	14	44	165	209	103	170	273	39	378	913	787

P_i: inorganic phosphorus; P_o: organic phosphorus; P_t: total phosphorus.