Phytoavailability of biosolids phosphorus

• Published in: Journal of environmental quality 2004-03, Vol.33 (2), p.703-712
• Main Authors: O'Connor, G.A, Sarkar, D, Brinton, S.R, Elliott, H.A, Martin, F.G
• Format: Article
• Language: English
• Subjects: Agriculture; Agronomy; Agronomy. Soil science and plant productions; Aluminum; application rate; Applied sciences; bioavailability; Biological; Biological and medical sciences; Biological Availability; Biosolids; biosolids composts; Categories; Composting; Copyrights; Digestion; Documents; Earth sciences; Earth, ocean, space; Engineering and environment geology. Geothermics; Environmental quality; Exact sciences and technology; Fertilizers; Fertilizing; Fundamental and applied biological sciences. Psychology; Grasses; Greenhouses; Iron; nutrient uptake; Paspalum notatum; Pasture; Phosphorus; Phosphorus - pharmacokinetics; Phosphorus removal; plant growth; Poaceae - chemistry; Pollution; Pollution, environment geology; Refuse Disposal; Sewage irrigation; soil amendments; soil chemical properties; Soils; Traveling salesman problem; triple superphosphate; Utilization; Waste water; Water treatment
• ISSN: 0047-2425; 1537-2537; 1537-2537
• DOI: 10.2134/jeq2004.0703

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 (50 g kg(-1)) total Fe and Al concentrations and processed to high (>60%) solids content.