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ResearchPaper
2019
Phosphorus-acquisition strategies of canola, wheat and barley in soil amended with sewage sludges
Phosphorus-acquisition strategies of canola, wheat and barley in soil amended with sewage sludges
Abstract (English)
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.
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Faculty of Agricultural Sciences
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Institute of Soil Science and Land Evaluation
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English
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630 Agriculture
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@techreport{Faucon2019,
url = {https://hohpublica.uni-hohenheim.de/handle/123456789/6439},
author = {Faucon, M.-P. and Kandeler, Ellen and Lambers, Hans et al.},
title = {Phosphorus-acquisition strategies of canola, wheat and barley in soil amended with sewage sludges},
year = {2019},
school = {Universität Hohenheim},
}