Search: WFRF:(Hu Yongfeng)
> (2020-2023) >
Soils potentially v...
Soils potentially vulnerable to phosphorus losses : speciation of inorganic and organic phosphorus and estimation of leaching losses
-
- Djodjic, Faruk (author)
- Swedish University of Agricultural Sciences, Sweden
-
- Bergström, Lars (author)
- Swedish University of Agricultural Sciences, Sweden
-
- Schmieder, Frank (author)
- Linnéuniversitetet,Institutionen för biologi och miljö (BOM)
-
show more...
-
- Sandström, Corine (author)
- Swedish University of Agricultural Sciences, Sweden
-
- Agback, Peter (author)
- Swedish University of Agricultural Sciences, Sweden
-
- Hu, Yongfeng (author)
- Univ Saskatchewan, Canada
-
show less...
-
(creator_code:org_t)
- Springer, 2023
- 2023
- English.
-
In: Nutrient Cycling in Agroecosystems. - : Springer. - 1385-1314 .- 1573-0867. ; 127, s. 225-245
- Related links:
-
https://doi.org/10.1...
-
show more...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
show less...
Abstract
Subject headings
Close
- 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.
Subject headings
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Markvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Soil Science (hsv//eng)
Keyword
- Phosphorus
- Eutrophication
- Agriculture
- Soil
- Leaching losses
- Miljövetenskap
- Environmental Science
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database