NDLI: The effect of soil water status on fertiliser, topsoil and subsoil phosphorus utilisation by wheat

Content Provider	Springer Nature Link
Author	McBeath, T. M. McLaughlin, M. J. Kirby, J. K. Armstrong, R. D.
Copyright Year	2012
Abstract	Crop phosphorus (P) content is controlled by P uptake from both banded P fertiliser and from P throughout the soil profile. These P supply factors are in turn controlled by soil, climatic and plant factors. The aim of this experiment was to measure the contribution of fertiliser, topsoil and subsoil P to wheat plants under wet and dry growing season conditions.An isotopic tracer technique was used to measure P uptake from fertiliser at seven agricultural field sites under wet and dry growing season conditions. At three of these sites a dual isotopic technique was used to distinguish between wheat uptake of P from fertiliser, topsoil (0–15 cm) and subsoil (below 15 cm).The amount of P fertiliser used by wheat was in the order of 3–30% of the P applied and increased with increasing rainfall. Topsoil P was the most important P source, but when sufficient P was present in the subsoil, P fertiliser addition stimulated the use of subsoil P.Most crop P uptake was from the topsoil, however P fertiliser banded below the seed increased plant P uptake and stimulated the use of subsoil P in one soil type in a decile 7 (above average rainfall) growing season.
Starting Page	337
Ending Page	348
Page Count	12
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	358
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-03-03
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Fertiliser efficiency Isotopic tracing Isotopic dilution Drought Crop nutrition Plant Physiology Soil Science & Conservation Ecology Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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