Phosphorus-acquisition strategies of canola, wheat and barley in soil amended with sewage sludges

Nobile, Cécile; Houben, D.; Michel, E.; Firmin, S.; Lambers, Hans; Kandeler, Ellen; Faucon, M.-P.

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Nobile, Cécile ; Houben, D. ; Michel, E. ; Firmin, S. ; Lambers, Hans ; Kandeler, Ellen ; Faucon, M.-P.

Phosphorus-acquisition strategies of canola, wheat and barley in soil amended with sewage sludges

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URN: urn:nbn:de:bsz:100-opus-16779
URL: http://opus.uni-hohenheim.de/volltexte/2020/1677/

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SWD-Schlagwörter:

Phosphor , Gärrest , Boden , Nährstoffaufnahme

Freie Schlagwörter (Englisch):

organic P fertilizer, mineral P fertilizer, carboxylate, phosphatase activity

Institut:

Institut für Bodenkunde und Standortslehre

DDC-Sachgruppe:

Landwirtschaft, Veterinärmedizin

Dokumentart:

ResearchPaper

Sprache:

Englisch

Erstellungsjahr:

2019

Publikationsdatum:

03.02.2020

Lizenz:

Dieser Inhalt ist unter einer Creative Commons-Lizenz lizenziert.

Kurzfassung auf Englisch:

Crops have different strategies to acquire poorly-available soil phosphorus (P) which are dependent on their architectural, morphological, and physiological root traits, but their capacity to enhance P acquisition varies with the type of fertilizer applied. The objective of this study was to examine how P-acquisition strategies of three main crops are affected by the application of sewage sludges, compared with a mineral P fertilizer. We carried out a 3-months greenhouse pot experiment and compared the response of P-acquisition traits among wheat, barley and canola in a soil amended with three sludges or a mineral P fertilizer. Results showed that the P-acquisition strategy differed among crops. Compared with canola, wheat and barley had a higher specific root length and a greater root carboxylate release and they acquired as much P from sludge as from mineral P. By contrast, canola shoot P content was greater with sludge than with mineral P. This was attributed to a higher rootreleased acid phosphatase activity which promoted the mineralization of sludge-derived P-organic. This study showed that contrasted P-acquisition strategies of crops allows increased use of renewable P resources by optimizing combinations of crop and the type of P fertilizer applied within the cropping system.