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Potential phosphorus release from catch crop shoots and roots after freezing-thawing

Liu, Jian and Khalaf, Rafa Abdulhassan and Ulen, Barbro and Bergkvist, Göran (2013). Potential phosphorus release from catch crop shoots and roots after freezing-thawing. Plant and soil. 371:1-2, 543-557
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Abstract

Background and Aims Catch crops used for mitigating nutrient losses to water can release phosphorus (P) when exposed to repeated freezing-thawing cycles (FTCs). This study sought to evaluate potential P losses from shoots and roots of eight catch crops. Methods Shoots and roots sampled from perennial ryegrass (Lolium perenne L.), cocksfoot (Dactylis glomerata L.), chicory (Cichorium intybus L.), phacelia (Phacelia tanacetifolia L.), red clover (Trifolium pratense L.), white mustard (Sinapis alba L.), oilseed radish (Raphanus sativus var. oleiformis L.) and white radish (R. sativus var. longipinnatus L.) were treated with no freezing, one single FTC, four continuous FTCs and four discontinuous FTCs. All samples were analysed for water-extractable P (WEP), and root samples also for characteristics such as specific root surface area (SSA). Results Freezing-thawing significantly increased potential P losses from both shoots and roots compared with no freezing. The two radish species and white mustard contained significantly higher concentrations of WEP than the other species, among which chicory and phacelia had the lowest WEP. On average, shoots had 43% higher WEP than roots. Cumulative P release from shoots and roots was strongly correlated with their total-P content (p=0.006 and p=0.002, respectively). Cumulative release of P from taproots was correlated with SSA (p=0.03). Conclusions Chicory, and possibly phacelia, appear to be promising catch crops for P.

Authors/Creators:Liu, Jian and Khalaf, Rafa Abdulhassan and Ulen, Barbro and Bergkvist, Göran
Title:Potential phosphorus release from catch crop shoots and roots after freezing-thawing
Series/Journal:Plant and soil (0032-079X)
Year of publishing :2013
Volume:371
Number:1-2
Page range:543-557
Number of Pages:15
Publisher:Springer
ISSN:0032-079X
Language:English
Additional Information:Publicerad open access med Springer. Copyright författarna.
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 405 Other Agricultural Sciences > Environmental Sciences related to Agriculture and Land-use
Keywords:Water-extractable phosphorus, Catch crop, Cover crop, Root morphology, Freezing-thawing, Climate change
URN:NBN:urn:nbn:se:slu:epsilon-e-1985
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-1985
Additional ID:
Type of IDID
Web of Science (WoS)000324882500041
DOI10.1007/s11104-013-1716-y
ID Code:11229
Faculty:NL - Faculty of Natural Resources and Agricultural Sciences (until 2013)
Department:(NL, NJ) > Dept. of Crop Production Ecology
(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment
Deposited By: SLUpub Connector
Deposited On:30 Jun 2014 09:18
Metadata Last Modified:10 Dec 2014 09:07

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