Biosolids Applications to Tall Fescue Have Long-Term Influence on Soil Nitrogen, Carbon, and Phosphorus
| Autor: | Andy I. Bary, Ann-Marie Fortuna, Craig G. Cogger, Elizabeth A. Myhre |
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| Rok vydání: | 2013 |
| Předmět: |
Environmental Engineering
Biosolids Soil test Nitrogen Phosphorus Ammonium nitrate Field experiment Soil organic matter chemistry.chemical_element Forage Management Monitoring Policy and Law Pollution Carbon Soil chemistry.chemical_compound chemistry Agronomy Environmental science Fertilizers Waste Management and Disposal Water Science and Technology |
| Zdroj: | Journal of Environmental Quality. 42:516-522 |
| ISSN: | 0047-2425 |
| DOI: | 10.2134/jeq2012.0269 |
| Popis: | Repeated applications of biosolids provide long-term benefits by increasing soil organic matter and N supply but can cause excess accumulation of P. Our objective was to determine the residual effects of repeated surface applications of biosolids on N availability and fate, tall fescue ( Schreb.) response, soil C, and P. A field experiment was started in 1993 to compare two biosolids products, each applied at three rates (6.7, 13.4, and 20.1 Mg ha yr), with synthetic N fertilizer (0 and 403 kg N ha yr as ammonium nitrate). Treatments were surface applied for 10 yr, followed by a 9-yr residual period where all plots received a reduced rate of inorganic N (202 kg N ha yr). Annual measurements included forage yield, N uptake, and soil nitrate N. Soil samples collected in 2002 and 2011 were analyzed for total C and N and Bray-1 P. Cumulative apparent N recoveries in harvested grass (1993-2010) were 51% for biosolids N and 72% for ammonium nitrate. Net fall soil nitrate N summed for the period 1993-2002 ranged from |
| Databáze: | OpenAIRE |
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