Growth and phosphorus uptake of faba bean and cotton are related to Colwell-P concentrations in the subsoil of Vertosols

McLaren, Timothy, Bell, Michael, Rochester, Ian, Guppy, Christopher, Tighe, Matthew and Flavel, Richard (2013) Growth and phosphorus uptake of faba bean and cotton are related to Colwell-P concentrations in the subsoil of Vertosols. Crop and Pasture Science, 64 8: 825-833. doi:10.1071/CP13025

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Author McLaren, Timothy
Bell, Michael
Rochester, Ian
Guppy, Christopher
Tighe, Matthew
Flavel, Richard
Title Growth and phosphorus uptake of faba bean and cotton are related to Colwell-P concentrations in the subsoil of Vertosols
Journal name Crop and Pasture Science   Check publisher's open access policy
ISSN 1836-0947
1836-5795
Publication date 2013
Year available 2013
Sub-type Article (original research)
DOI 10.1071/CP13025
Open Access Status
Volume 64
Issue 8
Start page 825
End page 833
Total pages 9
Place of publication Collingwood, VIC, Australia
Publisher C S I R O Publishing
Collection year 2014
Language eng
Formatted abstract
Recent studies report low and variable phosphorus (P) fertiliser use efficiency (PUE) for cotton in the northern grains region (NGR) of eastern Australia. This may be due to cotton accessing P pools that are not currently tested for in the subsoil (10 – 30 cm) or variation in response to P source and placement strategy. Two glasshouse studies were used to investigate this, incorporating two soil P tests to assess readily and slowly available P pools (Colwell, and a dilute acid colloquially referred to as the BSES extractant), and five different P fertiliser placement strategies in the subsoil. Eighteen Vertosols were collected across southern to central Queensland of the NGR, and then used to grow faba bean (Vicia faba L.) and cotton (Gossypium hirsutum L.) sequentially in the same 28 L pot. Readily available P pools assessed by Colwell-P were of major importance for faba bean and cotton dry matter, as well as tissue P concentrations. Cotton was less responsive to extractable subsoil P concentrations than faba bean, suggesting either greater internal PUE or an improved ability to accumulate P under conditions of limited availability. We recommend that subsoil P fertilisation should occur prior to sowing faba bean to maximise PUE in a cotton/faba bean rotation. Faba bean and cotton both recovered more P when the subsoil was fertilised, but no individual P fertiliser placement strategy was superior. Phosphorus extracted using the BSES method was not correlated with faba bean/cotton dry matter or tissue P concentration over the single crop cycle. We also recommend that Colwell-P be measured in the topsoil and subsoil to understand the quantity of plant available P in the NGR, and that further research is needed to describe the resupply of the readily available P pool from slowly available P pools during a single crop cycle.
Keyword Deep fertiliser placement
Nutrient management
Slowly available P
Vertisol
Yield response
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online: 29 October 2013.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Queensland Alliance for Agriculture and Food Innovation
Official 2014 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
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Created: Mon, 14 Oct 2013, 12:22:05 EST by Associate Professor Michael Bell on behalf of Centre for Plant Science