TY - JOUR
T1 - Phytoavailability of Biosolids Phosphorus
AU - O'Connor, G. A.
AU - Sarkar, D.
AU - Brinton, S. R.
AU - Elliott, H. A.
AU - Martin, F. G.
PY - 2004
Y1 - 2004
N2 - Efficient utilization of biosolids P for agronomic purposes requires accounting for differences in the phytoavailability of P in various biosolids. Greenhouse studies were conducted with a common pasture grass grown in two P-deficient soils amended with 12 biosolids and a commercial fertilizer (triple superphosphate, TSP) to quantify P uptake and to assess the relative phytoavailabilities of the P sources. Biosolids were grouped into three general categories of phytoavailability relative to TSP: high (>75% of TSP), moderate (25-75% of TSP), and low (<25% of TSP). Two biosolids, produced via biological phosphorus removal (BPR) processes, were in the high category, and mimicked fertilizer P with regard to P phytoavailability. Most biosolids produced by conventional wastewater and solids digestion and additional treatments like composting were in the moderate category. Also included in this category was a BPR that had been pelletized and another BPR supplemented with Al. The low category included biosolids containing greater than normal (>50 g kg-1) total Fe and Al concentrations and processed to high (>60%) solids content.
AB - Efficient utilization of biosolids P for agronomic purposes requires accounting for differences in the phytoavailability of P in various biosolids. Greenhouse studies were conducted with a common pasture grass grown in two P-deficient soils amended with 12 biosolids and a commercial fertilizer (triple superphosphate, TSP) to quantify P uptake and to assess the relative phytoavailabilities of the P sources. Biosolids were grouped into three general categories of phytoavailability relative to TSP: high (>75% of TSP), moderate (25-75% of TSP), and low (<25% of TSP). Two biosolids, produced via biological phosphorus removal (BPR) processes, were in the high category, and mimicked fertilizer P with regard to P phytoavailability. Most biosolids produced by conventional wastewater and solids digestion and additional treatments like composting were in the moderate category. Also included in this category was a BPR that had been pelletized and another BPR supplemented with Al. The low category included biosolids containing greater than normal (>50 g kg-1) total Fe and Al concentrations and processed to high (>60%) solids content.
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U2 - 10.2134/jeq2004.7030
DO - 10.2134/jeq2004.7030
M3 - Article
C2 - 15074823
AN - SCOPUS:1642290957
SN - 0047-2425
VL - 33
SP - 703
EP - 712
JO - Journal of Environmental Quality
JF - Journal of Environmental Quality
IS - 2
ER -