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Soils potentially v...
Soils potentially vulnerable to phosphorus losses : speciation of inorganic and organic phosphorus and estimation of leaching losses
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- Djodjic, Faruk (författare)
- Swedish University of Agricultural Sciences, Sweden
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- Bergström, Lars (författare)
- Swedish University of Agricultural Sciences, Sweden
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- Schmieder, Frank (författare)
- Linnéuniversitetet,Institutionen för biologi och miljö (BOM)
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- Sandström, Corine (författare)
- Swedish University of Agricultural Sciences, Sweden
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- Agback, Peter (författare)
- Swedish University of Agricultural Sciences, Sweden
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- Hu, Yongfeng (författare)
- Univ Saskatchewan, Canada
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(creator_code:org_t)
- Springer, 2023
- 2023
- Engelska.
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Ingår i: Nutrient Cycling in Agroecosystems. - : Springer. - 1385-1314 .- 1573-0867. ; 127, s. 225-245
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Eutrophication is an important threat to aquatic ecosystems world-wide, and reliable identification of areas vulnerable to phosphorus (P) losses from diffuse sources is essential for high efficiency of mitigation measures. In this three-step study we investigated (i) relationships between the agronomic (Olsen-P and P-AL) and environmental soil P tests (P-CaCl2) with molecular techniques (P-31 NMR and XANES) followed by (ii) rainfall simulation experiment on topsoil lysimeters and (iii) comparison to long-term field measurements of water quality. Soil samples were collected from seven sites indicated to be vulnerable to nutrient losses due to underlying geology. High P release correlated to standard agronomic P tests (Olsen P, r = 0.67; and P-AL, r = 0.74) and low P sorption capacity (r = - 0.5). High content of iron-bound P compounds indicated more labile P and higher release of dissolved P (r = 0.67). The leaching experiment showed that three out of four soils with high initial soil P status had both higher P leaching concentrations before fertilization (0.83-7.7 mg P l(-1)) compared to soil with low initial soil P status (0.007-0.23 mg P l(-1)), and higher increase in P concentrations after fertilization. Higher soil P sorption capacity reduced P leaching losses. Finally, long-term monitoring data show no significant trends in P losses in a field with low initial P content and moderate P fertilization rates whereas high and over time increasing P losses were recorded in a field with high initial soil P content and repetitively high P fertilization rates.
Ämnesord
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Markvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Soil Science (hsv//eng)
Nyckelord
- Phosphorus
- Eutrophication
- Agriculture
- Soil
- Leaching losses
- Miljövetenskap
- Environmental Science
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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