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Fractionation and mobility of phosphorus in a sandy forest soil amended with biosolids
- Source :
- Environmental science and pollution research international. 14(7)
- Publication Year :
- 2007
-
Abstract
- Biosolids, i.e., treated sewage sludge, are commonly used as a fertilizer and amendment to improve soil productivity. Application of biosolids to meet the nitrogen (N) requirements of crops can lead to accumulation of phosphorus (P) in soils, which may result in P loss to water bodies. Since 1996, biosolids have been applied to a Pinus radiata D. Don plantation near Nelson City, New Zealand, in an N-deficient sandy soil. To investigate sustainability of the biosolids application programme, a long-term research trial was established in 1997, and biosolids were applied every three years, at three application rates, including control (no biosolids), standard and high treatments, based on total N loading. The objective of this study was to evaluate the effect of repeated application of biosolids on P mobility in the sandy soil. Soil samples were collected in August 2004 from the trial site at depths of 0–10, 10–25, 25–50, 50–75, and 75–100 cm. The soil samples were analysed for total P (TP), plant-available P (Olsen P and Mehlich 3 P), and various P fractions (water-soluble, bioavailable, Fe and Al-bound, Ca-bound, and residual) using a sequential P fractionation procedure. Soil TP and Olsen P in the high biosolids treatment (equivalent to 600 kg N ha−1 applied every three years) had increased significantly (P
- Subjects :
- Topsoil
Soil test
Biosolids
Sewage
Health, Toxicology and Mutagenesis
Water Pollution
Amendment
Phosphorus
General Medicine
engineering.material
Chemical Fractionation
Pinus
Pollution
Carbon
Trees
Soil
Agronomy
Soil water
engineering
Environmental Chemistry
Environmental science
Soil horizon
Fertilizer
Leaching (agriculture)
Fertilizers
Subjects
Details
- ISSN :
- 09441344
- Volume :
- 14
- Issue :
- 7
- Database :
- OpenAIRE
- Journal :
- Environmental science and pollution research international
- Accession number :
- edsair.doi.dedup.....fe3cb8b5e5925ae5d29da6c9bc88f089