WFRF:(Gustafsson Jon Petter)
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- Braun, SabinaSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för mark och miljö,Department of Soil and Environment (author)
Assessing the ability of soil tests to estimate labile phosphorus in agricultural soils : Evidence from isotopic exchange
- Article/chapterEnglish2019
Publisher, publication year, extent ...
- Elsevier,2019
- printrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:kth-236319
- https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-236319URI
- https://doi.org/10.1016/j.geoderma.2018.09.048DOI
- https://res.slu.se/id/publ/98332URI
Supplementary language notes
- Language:English
- Summary in:English
Part of subdatabase
- SwePubSwePub
Classification
Notes
- QC 20181120
- Efficient phosphorus (P) fertilization strategies are essential for intensive crop production with minimal negative environmental impacts. A key factor in sustainable P use is assessment of the plant available soil P pool using soil P tests. This study determined isotopically exchangeable P after six days of reaction with 33PO4 (P-E (6 d)) to determine how accurately two commonly used P tests, Olsen and AL (acid ammonium acetate lactate) can quantify the amount of labile P. Soil samples were taken from both highly P-amended and unamended plots at six sites within the Swedish long-term soil fertility experiments. According to P K-edge XANES spectroscopy, the P speciation was dominated by Al-bound P and organic P, with additional contributions from Fe-bound P and Ca phosphates in most soils. The results showed that the AL test overestimated P-E (6 d) by a factor of 1.70 on average. In contrast, the Olsen test underestimated P-E (6 d), with the mean ratios of P-Olsen to P-E (6 d) being 0.52 for high-P and 0.19 for low-P soils. The 33P/31P ratio in the Olsen extract of a 33PO4 spiked soil was closer to that of a 0.005 mol L−1 CaCl2 soil extract than the corresponding ratio in the AL extract, suggesting that AL extraction solubilized more non-labile P. In conclusion, the AL and Olsen methods are not suitable for direct quantification of the isotopically exchangeable soil P pool after 6 days of equilibration. However, based on the results, Olsen may be superior to AL for classification of soil P status, due to its even performance for calcareous and non-calcareous soils and lower extraction of non-labile P.
Subject headings and genre
- LANTBRUKSVETENSKAPER Annan lantbruksvetenskap hsv//swe
- AGRICULTURAL SCIENCES Other Agricultural Sciences hsv//eng
- LANTBRUKSVETENSKAPER Lantbruksvetenskap, skogsbruk och fiske Markvetenskap hsv//swe
- AGRICULTURAL SCIENCES Agriculture, Forestry and Fisheries Soil Science hsv//eng
- Chemical analysis
- Isotopes P-33
- Isotopic exchange kinetic technique
- Phosphorus
- Soil P test
- Soils
- Chlorine compounds
- Cultivation
- Environmental impact
- Extraction
- Isotopes
- Soil testing
- X ray absorption near edge structure spectroscopy
- Agricultural soils
- Ammonium acetate
- Crop production
- IS assessment
- Isotopic exchange
- Isotopic exchange kinetics
- Noncalcareous soils
- Soil fertility
- Land and Water Resources Engineering
- Mark- och vattenteknik
Added entries (persons, corporate bodies, meetings, titles ...)
- Warrinnier, RubenKU Leuven, Belgium (author)
- Börjesson, GunnarSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för mark och miljö,Department of Soil and Environment(Swepub:slu)49477 (author)
- Ulen, BarbroSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för mark och miljö,Department of Soil and Environment(Swepub:slu)50662 (author)
- Smolders, ErikKU Leuven, Belgium (author)
- Gustafsson, Jon Petter,1964-Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,KTH,Vatten- och miljöteknik,Institutionen för mark och miljö,Department of Soil and Environment,Royal Institute of Technology (KTH)(Swepub:slu)49826 (author)
- Sveriges lantbruksuniversitetInstitutionen för mark och miljö (creator_code:org_t)
- Sveriges lantbruksuniversitet
Related titles
- In:Geoderma: Elsevier337, s. 350-3580016-70611872-6259
Internet link
- https://doi.org/10.1016/j.geoderma.2018.09.048Fulltext
- https://www.sciencedirect.com/science/article/pii/S0016706117321687Publisher
- https://doi.org/10.1016/j.geoderma.2018.09.048
- https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-236319
- https://doi.org/10.1016/j.geoderma.2018.09.048
- https://res.slu.se/id/publ/98332
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